Home » Public Forums » GMCnet » How to use a 48 volt inverter
| How to use a 48 volt inverter [message #339172] |
Fri, 30 November 2018 06:47  |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Senior Member |
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Help me figure out how to use this:
I came across a $1000+ APC brand smt3000 uninterruptible power supply tower at a yard sale. Bought it for next to nothing.
Full specs here
https://www.apc.com/shop/us/en/products/APC-Smart-UPS-3000VA-LCD-120V/P-SMT3000
It puts out pure sine wave. Has four 12 volt batteries in it, and thus is looking for 48 volts. It is heavy (100+ pounds)
I can't figure how to use it as an inverter drawing from the house batteries (which would eliminate redundant battery weight), or charge the 48 internal volt bank from 12 volt engine source. Of course I can charge the unit when on shore power or genny, and just run until done, but that defeats the extended boondocking goal.
Thoughts?
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: How to use a 48 volt inverter [message #339179 is a reply to message #339172] |
Fri, 30 November 2018 08:27  |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
Karma: 12
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Senior Member |
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Also keep in mind there are 2 types of UPSs. The cheapos pass AC through and turn on to synthesize AC when input AC falters. The real type which are more expensive always sythesize AC and use incoming AC source only to maintain batteries which feed the inverter section. That way the sine wave is always contiguous.
You need another yard sale with a sine wave 12 to 125V inverter to charge the UPS while driving. Just kidding as would draw too much on DC side.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: How to use a 48 volt inverter [message #339184 is a reply to message #339172] |
Fri, 30 November 2018 10:37 |
GatsbysCruise
Messages: 261
Registered: January 2017
Location: Waukegan, Illinois
Karma: 3
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Senior Member |
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Well that is a find
My experience with UPS units is they have little long term operating time.
Now a 48v sine wave inverter is good for certain uses, but I think you would have to
scratch your head to get it working in the GMC.
To extend the run time, or to run all the time would need solar panels and a battery bank.
The GMC probably would complain with the battery weight you would need from the battery bank.
I have a 12v ups I was going to use in the GMC until I connected a frequency meter to the
120v output. All was good at line power, 60 hertz but when the 120v power was dropped,
The frequency meter jumped to 200 hertz. This may or may not have been a glich with the
UPS but I decided to go with a Sine wave 12vdc inverter.
Either way if you are looking for big power out of an inverter, you will have a problem having a big enough
battery bank (WEIGHT) and if plans are to add solar, you can't get enough solar panels for heavy power
supply over a long term.
I'd have to crunch the numbers again but a 12v inverter with a tolerable battery bank may supply 1 to 5 amps
with little problems, 6to 8 would even work but maybe not continually and 9 amps and up for short periods.
The 48v unit just doesn't seem doable as a bank of 4 12v batteries connected in series for the 48v is going to be from 300 to 400 lbs and will only supply about 100 amps (the volts add up, not the AH's).
To get any good run times you'd have to add more batteries, 4 batts at a time, which not only questions the weight problem but where would you put them.
Charging the batteries would be the next question, and again, you don't have enough roof for solar panels for that 48v UPS batteries.
THE BEST SENARIO would be a 12v system, charged by solar (eventually) powering 12v applicances. An inverter
is a power hog, 10A at 120v needs 100A of 12v battery power. If you have 2 batteries in parallel, that might get you 18 hours, maybe.
so 100AH at 48v supplying a 10 amp load would run about 30 amps, (real rough figures) but you want to keep your battery load around 5A per bank which means you need about 5 or 6 battery banks of 4 each... It's starting to not sound so feasible.
Just to know
The higher the DC voltage supply, the lower the amp draw...
I can't see how you could get that unit operational in a GMC from its needs.
A 12vdc sine wave is pretty much doable, but you will have power limits and length of run but the battery bank is not impossible.
A 24v sine wave is also doable but now you have banks of 2 12v batteries in series, 100AH per bank. But weight will again factor in.
The only thing that might be possible is Lithium batteries, they put out big power, have large storage and are very
light, HOWEVER you need to do your homework with Lithiums.
They are EXPENSIVE to purchase and they have limitations. They can't be charged if in freezing cold temperatures. If you try, the battery is destroyed. Lithium batteries like a more "normal" temperature operating range. I read that range is 70 to 80 but the electric cars have them. HOWEVER, keep in mind, and I will use the Chevy VOLT as an example.
The VOLT lithium battery has many monitors on it and temperature is one of the main monitor points. The car will heat or cool the battery as needed to prevent warping and shorting of the battery plates. They use a separate radiator cooling/heating system to accomplish this.
A lot of people are jumping on the lithium battery band wagon, which in a way is good, but are not being told about these limitations...
GatsbysCruise. \
74GMC260 Former Glacier Model style. \
Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO - UBUNTU VOYAGER - Berzin Auto Center
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| Re: [GMCnet] How to use a 48 volt inverter [message #339189 is a reply to message #339184] |
Fri, 30 November 2018 11:18 |
Richard Denney
Messages: 920
Registered: April 2010
Karma: 9
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Senior Member |
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Sorry, can’t trim the long quote in this software.
A bank of four 12v batteries will indeed provide four times the run time
even at the same amp-hour rating. If the inverter is supplying, say, 1200
watts at 120VAC, it will draw 1200 watts from the 48VDC, plus inversion
losses (which I’ll ignore because it’s not part of my point). 1200 watts at
48 volts is 25 amps, and a bank that can supply 100 amp-hours (using four
100AH 12V batteries in series) will run four hours, nominally. Those same
four batteries, wired in parallel and feeding a 12V inverter, will provide
400ah, but that 1200 watts will require 100 amps, and the bank will still
last four hours.
The difference is the wiring. Wiring for 25 amps will be much smaller than
for 100 amps.
But the problem is figuring out how to charge a 48-volt battery bank.
Rick “power is power” Denney
On Fri, Nov 30, 2018 at 11:45 AM slc wrote:
> Well that is a find
>
> My experience with UPS units is they have little long term operating time.
>
> Now a 48v sine wave inverter is good for certain uses, but I think you
> would have to
> scratch your head to get it working in the GMC.
>
> To extend the run time, or to run all the time would need solar panels and
> a battery bank.
> The GMC probably would complain with the battery weight you would need
> from the battery bank.
>
> I have a 12v ups I was going to use in the GMC until I connected a
> frequency meter to the
> 120v output. All was good at line power, 60 hertz but when the 120v power
> was dropped,
> The frequency meter jumped to 200 hertz. This may or may not have been a
> glich with the
> UPS but I decided to go with a Sine wave 12vdc inverter.
>
> Either way if you are looking for big power out of an inverter, you will
> have a problem having a big enough
> battery bank (WEIGHT) and if plans are to add solar, you can't get enough
> solar panels for heavy power
> supply over a long term.
>
> I'd have to crunch the numbers again but a 12v inverter with a tolerable
> battery bank may supply 1 to 5 amps
> with little problems, 6to 8 would even work but maybe not continually and
> 9 amps and up for short periods.
>
> The 48v unit just doesn't seem doable as a bank of 4 12v batteries
> connected in series for the 48v is going to be from 300 to 400 lbs and will
> only
> supply about 100 amps (the volts add up, not the AH's).
> To get any good run times you'd have to add more batteries, 4 batts at a
> time, which not only questions the weight problem but where would you put
> them.
>
> Charging the batteries would be the next question, and again, you don't
> have enough roof for solar panels for that 48v UPS batteries.
>
> THE BEST SENARIO would be a 12v system, charged by solar (eventually)
> powering 12v applicances. An inverter
> is a power hog, 10A at 120v needs 100A of 12v battery power. If you have
> 2 batteries in parallel, that might get you 18 hours, maybe.
> so 100AH at 48v supplying a 10 amp load would run about 30 amps, (real
> rough figures) but you want to keep your battery load around 5A per bank
> which
> means you need about 5 or 6 battery banks of 4 each... It's starting to
> not sound so feasible.
>
> Just to know
>
> The higher the DC voltage supply, the lower the amp draw...
> I can't see how you could get that unit operational in a GMC from its
> needs.
>
> A 12vdc sine wave is pretty much doable, but you will have power limits
> and length of run but the battery bank is not impossible.
> A 24v sine wave is also doable but now you have banks of 2 12v batteries
> in series, 100AH per bank. But weight will again factor in.
>
> The only thing that might be possible is Lithium batteries, they put out
> big power, have large storage and are very
> light, HOWEVER you need to do your homework with Lithiums.
> They are EXPENSIVE to purchase and they have limitations. They can't be
> charged if in freezing cold temperatures. If you try, the battery is
> destroyed. Lithium batteries like a more "normal" temperature operating
> range. I read that range is 70 to 80 but the electric cars have them.
> HOWEVER, keep in mind, and I will use the Chevy VOLT as an example.
> The VOLT lithium battery has many monitors on it and temperature is one of
> the main monitor points. The car will heat or cool the battery as needed
> to prevent warping and shorting of the battery plates. They use a
> separate radiator cooling/heating system to accomplish this.
> A lot of people are jumping on the lithium battery band wagon, which in a
> way is good, but are not being told about these limitations...
> --
> GatsbysCruise. \
> 74GMC260 Former Glacier Model style. \
> Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS
> FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO -
> UBUNTU VOYAGER - Berzin Auto Center
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
Rick Denney
73 x-Glacier 230 "Jaws"
Off-list email to rick at rickdenney dot com
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| Re: [GMCnet] How to use a 48 volt inverter [message #339194 is a reply to message #339184] |
Fri, 30 November 2018 11:41 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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You need to check into this -
https://voltapowersystems.com/wp-content/uploads/2018/01/Level-Three_1.8.17_WEB.pdf
They have a gold plated customer list, and their stuff isn’t cheap.
The claim is overnight with a 15,000 btu AC, but there’s this caveat - 50% duty cycle.
I use Liebert “Online” UPS’s for data and my media center at home. 96v of batteries, and the inverters reliably deliver the 2kVa advertised.
Dolph Santorine
DE AD0LF
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
Sullybuilt Bags, Reaction Arms, Manny Transmission
> On Nov 30, 2018, at 11:37 AM, slc wrote:
>
> Well that is a find
>
> My experience with UPS units is they have little long term operating time.
>
> Now a 48v sine wave inverter is good for certain uses, but I think you would have to
> scratch your head to get it working in the GMC.
>
> To extend the run time, or to run all the time would need solar panels and a battery bank.
> The GMC probably would complain with the battery weight you would need from the battery bank.
>
> I have a 12v ups I was going to use in the GMC until I connected a frequency meter to the
> 120v output. All was good at line power, 60 hertz but when the 120v power was dropped,
> The frequency meter jumped to 200 hertz. This may or may not have been a glich with the
> UPS but I decided to go with a Sine wave 12vdc inverter.
>
> Either way if you are looking for big power out of an inverter, you will have a problem having a big enough
> battery bank (WEIGHT) and if plans are to add solar, you can't get enough solar panels for heavy power
> supply over a long term.
>
> I'd have to crunch the numbers again but a 12v inverter with a tolerable battery bank may supply 1 to 5 amps
> with little problems, 6to 8 would even work but maybe not continually and 9 amps and up for short periods.
>
> The 48v unit just doesn't seem doable as a bank of 4 12v batteries connected in series for the 48v is going to be from 300 to 400 lbs and will only
> supply about 100 amps (the volts add up, not the AH's).
> To get any good run times you'd have to add more batteries, 4 batts at a time, which not only questions the weight problem but where would you put
> them.
>
> Charging the batteries would be the next question, and again, you don't have enough roof for solar panels for that 48v UPS batteries.
>
> THE BEST SENARIO would be a 12v system, charged by solar (eventually) powering 12v applicances. An inverter
> is a power hog, 10A at 120v needs 100A of 12v battery power. If you have 2 batteries in parallel, that might get you 18 hours, maybe.
> so 100AH at 48v supplying a 10 amp load would run about 30 amps, (real rough figures) but you want to keep your battery load around 5A per bank which
> means you need about 5 or 6 battery banks of 4 each... It's starting to not sound so feasible.
>
> Just to know
>
> The higher the DC voltage supply, the lower the amp draw...
> I can't see how you could get that unit operational in a GMC from its needs.
>
> A 12vdc sine wave is pretty much doable, but you will have power limits and length of run but the battery bank is not impossible.
> A 24v sine wave is also doable but now you have banks of 2 12v batteries in series, 100AH per bank. But weight will again factor in.
>
> The only thing that might be possible is Lithium batteries, they put out big power, have large storage and are very
> light, HOWEVER you need to do your homework with Lithiums.
> They are EXPENSIVE to purchase and they have limitations. They can't be charged if in freezing cold temperatures. If you try, the battery is
> destroyed. Lithium batteries like a more "normal" temperature operating range. I read that range is 70 to 80 but the electric cars have them.
> HOWEVER, keep in mind, and I will use the Chevy VOLT as an example.
> The VOLT lithium battery has many monitors on it and temperature is one of the main monitor points. The car will heat or cool the battery as needed
> to prevent warping and shorting of the battery plates. They use a separate radiator cooling/heating system to accomplish this.
> A lot of people are jumping on the lithium battery band wagon, which in a way is good, but are not being told about these limitations...
> --
> GatsbysCruise. \
> 74GMC260 Former Glacier Model style. \
> Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO -
> UBUNTU VOYAGER - Berzin Auto Center
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] How to use a 48 volt inverter [message #339198 is a reply to message #339194] |
Fri, 30 November 2018 15:30 |
johnd01
Messages: 354
Registered: July 2017
Location: Sacrameot
Karma: -1
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Senior Member |
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Good stuff so far. Richard left out that you should not pull more than 50%
from the battery bank he was talking about. The batteries in your UPS may
need to be replaced.
You could fit up to 8 SolarWorld SW345 XL solar panels on the roof. They
would have to go over everything on the roof for a 2760 watts DC nameplate
rating. You may get half that out of a system with good sunlight.
https://www.wholesalesolar.com/1922348/solarworld/solar-panels/solarworld-swa-345-xl-black-frame-mono-solar-panel
You could install a Tesla PowerWall2 or you could build your own by
understanding this guy.
https://www.youtube.com/user/jehugarcia/videos
https://www.youtube.com/watch?v=akLOCPeKavc
https://www.youtube.com/watch?v=g7V9XQ34chc
https://www.youtube.com/watch?v=WvYlfZCOacE
https://www.youtube.com/watch?v=tbaeMWdDlqY
This is a site to get some questions answered
https://secondlifestorage.com/
On Fri, Nov 30, 2018 at 9:42 AM Adolph Santorine
wrote:
> You need to check into this -
>
>
> https://voltapowersystems.com/wp-content/uploads/2018/01/Level-Three_1.8.17_WEB.pdf
>
> They have a gold plated customer list, and their stuff isn’t cheap.
>
> The claim is overnight with a 15,000 btu AC, but there’s this caveat - 50%
> duty cycle.
>
> I use Liebert “Online” UPS’s for data and my media center at home. 96v of
> batteries, and the inverters reliably deliver the 2kVa advertised.
>
>
> Dolph Santorine
>
> DE AD0LF
>
> Wheeling, West Virginia
>
> 1977 ex-Palm Beach TZE167V100820
> Sullybuilt Bags, Reaction Arms, Manny Transmission
>
>
>> On Nov 30, 2018, at 11:37 AM, slc wrote:
>>
>> Well that is a find
>>
>> My experience with UPS units is they have little long term operating
> time.
>>
>> Now a 48v sine wave inverter is good for certain uses, but I think you
> would have to
>> scratch your head to get it working in the GMC.
>>
>> To extend the run time, or to run all the time would need solar panels
> and a battery bank.
>> The GMC probably would complain with the battery weight you would need
> from the battery bank.
>>
>> I have a 12v ups I was going to use in the GMC until I connected a
> frequency meter to the
>> 120v output. All was good at line power, 60 hertz but when the 120v
> power was dropped,
>> The frequency meter jumped to 200 hertz. This may or may not have been
> a glich with the
>> UPS but I decided to go with a Sine wave 12vdc inverter.
>>
>> Either way if you are looking for big power out of an inverter, you will
> have a problem having a big enough
>> battery bank (WEIGHT) and if plans are to add solar, you can't get
> enough solar panels for heavy power
>> supply over a long term.
>>
>> I'd have to crunch the numbers again but a 12v inverter with a tolerable
> battery bank may supply 1 to 5 amps
>> with little problems, 6to 8 would even work but maybe not continually
> and 9 amps and up for short periods.
>>
>> The 48v unit just doesn't seem doable as a bank of 4 12v batteries
> connected in series for the 48v is going to be from 300 to 400 lbs and will
> only
>> supply about 100 amps (the volts add up, not the AH's).
>> To get any good run times you'd have to add more batteries, 4 batts at a
> time, which not only questions the weight problem but where would you put
>> them.
>>
>> Charging the batteries would be the next question, and again, you don't
> have enough roof for solar panels for that 48v UPS batteries.
>>
>> THE BEST SENARIO would be a 12v system, charged by solar (eventually)
> powering 12v applicances. An inverter
>> is a power hog, 10A at 120v needs 100A of 12v battery power. If you
> have 2 batteries in parallel, that might get you 18 hours, maybe.
>> so 100AH at 48v supplying a 10 amp load would run about 30 amps, (real
> rough figures) but you want to keep your battery load around 5A per bank
> which
>> means you need about 5 or 6 battery banks of 4 each... It's starting
> to not sound so feasible.
>>
>> Just to know
>>
>> The higher the DC voltage supply, the lower the amp draw...
>> I can't see how you could get that unit operational in a GMC from its
> needs.
>>
>> A 12vdc sine wave is pretty much doable, but you will have power limits
> and length of run but the battery bank is not impossible.
>> A 24v sine wave is also doable but now you have banks of 2 12v
> batteries in series, 100AH per bank. But weight will again factor in.
>>
>> The only thing that might be possible is Lithium batteries, they put out
> big power, have large storage and are very
>> light, HOWEVER you need to do your homework with Lithiums.
>> They are EXPENSIVE to purchase and they have limitations. They can't be
> charged if in freezing cold temperatures. If you try, the battery is
>> destroyed. Lithium batteries like a more "normal" temperature operating
> range. I read that range is 70 to 80 but the electric cars have them.
>> HOWEVER, keep in mind, and I will use the Chevy VOLT as an example.
>> The VOLT lithium battery has many monitors on it and temperature is one
> of the main monitor points. The car will heat or cool the battery as needed
>> to prevent warping and shorting of the battery plates. They use a
> separate radiator cooling/heating system to accomplish this.
>> A lot of people are jumping on the lithium battery band wagon, which in
> a way is good, but are not being told about these limitations...
>> --
>> GatsbysCruise. \
>> 74GMC260 Former Glacier Model style. \
>> Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS
> FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO -
>> UBUNTU VOYAGER - Berzin Auto Center
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
--
*John Phillips*
_______________________________________________
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Johnd01
John Phillips
Avion A2600 TZE064V101164
Rancho Cordova, CA (Sacramento)
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| Re: How to use a 48 volt inverter [message #339199 is a reply to message #339172] |
Fri, 30 November 2018 16:56 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Could you use something like this to put on 48v golf cart to run 110v hedge clippers, pole saw, elec chain saw, etc for yard and construction work instead of toting around a gas generator? Feasable?
C. Boyd
76 Crestmont
East Tennessee
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| Re: How to use a 48 volt inverter [message #339200 is a reply to message #339199] |
Fri, 30 November 2018 17:22 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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The 2018 Ford 3/4 ton pu I looked at had an inverter under the back seat with a 110 outlet in the bed and the Lincoln Continental Livery model has 110 outlets also in It but are surely 12v powered like the auxiliary one in our coach. Just don't think they would work on a daily basis. Maybe by keeping the engine running but would surely use more gas than the 2500 Honda generator.
C Boyd wrote on Fri, 30 November 2018 17:56Could you use something like this to put on 48v golf cart to run 110v hedge clippers, pole saw, elec chain saw, etc for yard and construction work instead of toting around a gas generator? Feasable?
C. Boyd
76 Crestmont
East Tennessee
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| Re: How to use a 48 volt inverter [message #339204 is a reply to message #339202] |
Fri, 30 November 2018 20:19 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Thank you..
RF_Burns wrote on Fri, 30 November 2018 18:58Chuck,
The inverters in my 2014,15,16 & 2018 Chev and GMC pickups are all low power ~300 watt inverters. The tools you want to run are all powered by universal motors (usually). They have a high startup current that will likely trip the overload of that UPS.
Might as well stick with the generator!
C. Boyd
76 Crestmont
East Tennessee
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| Re: How to use a 48 volt inverter [message #339237 is a reply to message #339172] |
Sun, 02 December 2018 07:36 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Can you do it? Yeah. Is it reasonable to do? Probably not. You'd need a four battery bank, and some heavy switches and some 00 cables with ends crimped on. The switches would allow you to parallel the batteries for charging when you have the engine running or shore power running; and series them to run the inverter. Do-able, but more trouble than it's worth.
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] How to use a 48 volt inverter [message #339245 is a reply to message #339237] |
Sun, 02 December 2018 10:35 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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The Volta system requires a second 48v alternator.
Dolph Santorine
DE AD0LF
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
Sullybuilt Bags, Reaction Arms, Manny Transmission
> On Dec 2, 2018, at 8:36 AM, Johnny Bridges via Gmclist wrote:
>
> Can you do it? Yeah. Is it reasonable to do? Probably not. You'd need a four battery bank, and some heavy switches and some 00 cables with ends
> crimped on. The switches would allow you to parallel the batteries for charging when you have the engine running or shore power running; and series
> them to run the inverter. Do-able, but more trouble than it's worth.
> --
> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] How to use a 48 volt inverter [message #339250 is a reply to message #339245] |
Sun, 02 December 2018 16:13 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Dolph & Johnny.. so the golf cart has 4 12volt trojan t1275 batteries in series @48 volts that I could hook the 48v inverter to so I could plug in the hedge trimmers and the Club Car 48 volt 10 amp smart charger and go for it? Y'all really make it sound simple and I have never stayed at a Holiday Inn Express!
Dolph Santorine wrote on Sun, 02 December 2018 11:35The Volta system requires a second 48v alternator.
Dolph Santorine
DE AD0LF
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
Sullybuilt Bags, Reaction Arms, Manny Transmission
> On Dec 2, 2018, at 8:36 AM, Johnny Bridges via Gmclist wrote:
>
> Can you do it? Yeah. Is it reasonable to do? Probably not. You'd need a four battery bank, and some heavy switches and some 00 cables with ends
> crimped on. The switches would allow you to parallel the batteries for charging when you have the engine running or shore power running; and series
> them to run the inverter. Do-able, but more trouble than it's worth.
> --
> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
> Braselton, Ga.
> "I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
>
>
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C. Boyd
76 Crestmont
East Tennessee
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| Re: [GMCnet] How to use a 48 volt inverter [message #339268 is a reply to message #339250] |
Sun, 02 December 2018 19:54 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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It’s so easy, not everyone is doing it.
Including me.
Yet. I really like the Volta setup (can’t you tell). Lots of pictures of Ben Franklin, though.
Dolph
DE AD0LF
Wheeling, West Virginia
1977 26’ ex-PalmBeach
Howell EFI & EBL, Reaction Arms, Sullybilt Bags, Manny Transmission
“The Aluminum and Fiberglass Mistress"
> On Dec 2, 2018, at 5:13 PM, Charles Boyd wrote:
>
> Dolph & Johnny.. so the golf cart has 4 12volt trojan t1275 batteries in series @48 volts that I could hook the 48v inverter to so I could plug in
> the hedge trimmers and the Club Car 48 volt 10 amp smart charger and go for it? Y'all really make it sound simple and I have never stayed at a
> Holiday Inn Express!
>
>
>
>
> Dolph Santorine wrote on Sun, 02 December 2018 11:35
>> The Volta system requires a second 48v alternator.
>>
>> Dolph Santorine
>>
>> DE AD0LF
>>
>> Wheeling, West Virginia
>>
>> 1977 ex-Palm Beach TZE167V100820
>> Sullybuilt Bags, Reaction Arms, Manny Transmission
>>
>>
>>> On Dec 2, 2018, at 8:36 AM, Johnny Bridges via Gmclist wrote:
>>>
>>> Can you do it? Yeah. Is it reasonable to do? Probably not. You'd need a four battery bank, and some heavy switches and some 00 cables
>>> with ends
>>> crimped on. The switches would allow you to parallel the batteries for charging when you have the engine running or shore power running; and
>>> series
>>> them to run the inverter. Do-able, but more trouble than it's worth.
>>> --
>>> Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
>>> Braselton, Ga.
>>> "I forgive them all, save those who hurt the dogs. They must answer to me in hell" - ol Andy, paraphrased
>>>
>>>
>>> _______________________________________________
>>> GMCnet mailing list
>>> Unsubscribe or Change List Options:
>>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> --
> C. Boyd
> 76 Crestmont
> East Tennessee
>
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| Re: How to use a 48 volt inverter [message #339269 is a reply to message #339237] |
Mon, 03 December 2018 06:57 |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Thanks for the thoughts, Johnny's response about switching between paralllel for charging and series for running it is closest to what I was thinking. If I did not want to increase overall capacity of the unit, and use the batteries in it already, they have pretty small wire compared to the inverter setups I see for RVs. They are less than a foot for one thing, but I would say 10 gauge as an amatuer guess.
My current use of the inverter I have is a 400 watt that runs four strings of LED Christmas lights (2 outside, 2 inside), a filament bulb lit star in one window, and a small disco spinner color light (one filament candlelabra bulb is all it has). I do tacky light tours, run the neighborhood little kids around, and take groups Christmas caroling in it. Add one string of filament bulbs and it is overloaded.
Now I guess I'll see what I can get for the big inverter on Craigslist! Anyone here need a $1200 retail, network control, 30 amp wall socket pure sine output, inverter?
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: How to use a 48 volt inverter [message #339859 is a reply to message #339172] |
Mon, 31 December 2018 11:57 |
Tilerpep
Messages: 404
Registered: June 2013
Location: Raleigh, NC
Karma: 7
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Senior Member |
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I just found this 9 part series by a guy who did some major teaching/ upgrading/ testing of a 24 volt UPS
https://youtu.be/2HXvV30E7wQ
It confirms much of what this thread already lent itself to: the unit I have is not a great fit for RV use. If you like to learn why, and not just if, it is pretty good in a DIY way.
My next question/ test might be this:
If I just put the whole unit in as it is...can a 400 watt modified sine inverter successfully charge the SMT3000? Inefficiency aside for now...going down the road the 400 watt would just power the standard plug on the big one with built in quad battery setup. Then any load would run off the big unit. My fear is burning up the thinker on the SMT3000 with the little guy sourcing 120volt. Another advantage of this is redundancy, essentially an engine 12 v electrical system, house 12 v system, and a house 120 system while boondocking...any of the three can be run to full edge of capacity, and it doesn't leave you stranded or optionless.
Daughter's boyfriend says "sell it and get the normal solution" - ha, he is not fully indoctrinated in the 'what can i do with what I have, and what will i learn (easy or hard way) as I do it?"
1975 Glenbrook, 1978 Royale rear bath
Raleigh, NC
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| Re: How to use a 48 volt inverter [message #339868 is a reply to message #339172] |
Mon, 31 December 2018 17:53 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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Senior Member |
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Chuck it depends the starting surge of the tool and the surge capacity of the power supply... which usually isn't great. You 'bout hafta try. They don't have a flywheel and engine spinning around with stored up energy. Overload it and it stalls - just quits and shuts off usually. See if somebody has an AC ammeter you can borroy and measure the draw on the tool. Be sure you measure with the tool loaded - cutting.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: How to use a 48 volt inverter [message #339872 is a reply to message #339868] |
Mon, 31 December 2018 18:10 |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Senior Member |
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Th@nks Johnny.
I do h@ve @n ac @mpmeter that Wally gave me. This iPad did #ome updating all on its on and started randomly changing s9me characters. I have alw@ys wondered why a comp@ny would have a apple for a logo with a bite out of it. It is starting to make sense. Like push enter to exit th3 program. Or push start to turn it off..
Johnny Bridges wrote on Mon, 31 December 2018 18:53Chuck it depends the starting surge of the tool and the surge capacity of the power supply... which usually isn't great. You 'bout hafta try. They don't have a flywheel and engine spinning around with stored up energy. Overload it and it stalls - just quits and shuts off usually. See if somebody has an AC ammeter you can borroy and measure the draw on the tool. Be sure you measure with the tool loaded - cutting.
--johnny
C. Boyd
76 Crestmont
East Tennessee
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