Home » Public Forums » GMCnet » most efficient sine wave inverter?
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| Re: most efficient sine wave inverter? [message #121454 is a reply to message #121444] |
Sun, 10 April 2011 11:17   |
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Thanks for the link Rob, gave me a quite a bit to look at, seems about 90% is the highest efficientcy for these things.so basically if I have 250 AH I really only have 225 usable assuming a total discharge, but probably wont wanna go more than a half cycle.
I may go with the Xantrex unit since it seems a good deal for the money, though I will probably get it off eBay since the Xantrex ProWatt SW 1kw can be had for about $250 there and since I have a $200 ebay gift card, and some ebay bux means my out of pocket will be about $25 B-) when on a budget I look for the absolute most pan free way of getting it done! though that site does have some good prices and its good to have a large selection of models to compare 
| idrob wrote on Sun, 10 April 2011 00:50 |
| Duce Apocalypse wrote on Sat, 09 April 2011 12:00 |
looking to get one in the 1kw range. does anyone have recommendations?
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Excellent site for all kinds of inverters at good prices. I understand good service also, but I have not ordered from them. A friend has.
http://www.donrowe.com/inverters/puresine.html
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73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
[Updated on: Sun, 10 April 2011 11:19] Report message to a moderator |
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| Re: most efficient sine wave inverter? [message #121458 is a reply to message #121454] |
Sun, 10 April 2011 11:42 |
idrob
Messages: 645
Registered: January 2005
Location: Central Idaho
Karma: 0
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Senior Member |
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| Duce Apocalypse wrote on Sun, 10 April 2011 09:17 |
Thanks for the link Rob, gave me a quite a bit to look at, seems about 90% is the highest efficientcy for these things.so basically if I have 250 AH I really only have 225 usable assuming a total discharge, but probably wont wanna go more than a half cycle.
I may go with the Xantrex unit since it seems a good deal for the money, though I will probably get it off eBay since the Xantrex ProWatt SW 1kw can be had for about $250 there and since I have a $200 ebay gift card, and some ebay bux means my out of pocket will be about $25 B-) when on a budget I look for the absolute most pan free way of getting it done! though that site does have some good prices and its good to have a large selection of models to compare
| idrob wrote on Sun, 10 April 2011 00:50 |
| Duce Apocalypse wrote on Sat, 09 April 2011 12:00 |
looking to get one in the 1kw range. does anyone have recommendations?
|
Excellent site for all kinds of inverters at good prices. I understand good service also, but I have not ordered from them. A friend has.
http://www.donrowe.com/inverters/puresine.html
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Glad it was helpful to you. The Xantrex units have been good in the past so you probably will be happy with that choice. We all try to save as many dollars as possible, so picking it up where the price is right for you is nothing to be sneezed at.
Do you really need a 1000 watt capacity? The smaller units may have lower standby losses, and the 90% efficiency they quote is always at higher loads, lower loads usually mean lower efficiency. So, a small inverter with a 100 watt load will be more efficient overall than a large inverter supplying that same 100 watt load. That is a general statement, and I have no real numbers to back it up, but I think it is generally true.
Be sure to have a way of disconnecting it, and a fuse in the circuit. Those costs are extra, but the safety is important.
Rob Allen
former owner of '76 x-PB
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| Re: most efficient sine wave inverter? [message #121463 is a reply to message #121444] |
Sun, 10 April 2011 15:17 |
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[quote title=idrob wrote on Sat, 09 April 2011 22:50]| Duce Apocalypse wrote on Sat, 09 April 2011 12:00 |
looking to get one in the 1kw range. does anyone have recommendations?
|
Excellent site for all kinds of inverters at good prices. I understand good service also, but I have not ordered from them. A friend has.
I bought a 600 watt sine wave from Rowe. I use it to run my refrigerator and TV. It has performed flawlessly for many hours and I'd recommend it, as it has a good price also.
geo groth '73 260 Sequoia
Carson City Nevada 89703
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| Re: most efficient sine wave inverter? [message #121594 is a reply to message #121458] |
Tue, 12 April 2011 10:09 |
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Well I figered the 1kw would have enough headroom to run my 42" flatscreen, coffee maker, and possibly even my small microwave but I think it may have too much power. as for standing losses, the ProWatt SW from Xantrex seems to have dead even stats in terms of no load draw (0.6a DC) between the 1kw and 600w versions, both list optimal efficientcy of 90%, when you go to the 2 kw version thats when no load goes up considerably.
I saw some inverters which advertised a better efficientcy at part load, wouldnt having a higher load = more heat, and thus a decreased efficientcy? I have a DC amp meter, but I would hate to have to buy 2 inverters just to test their part throttle loads! lol
As for the wiring and loss, this wil lgive me an oppertunity to finally address the loss prone house DC system, which on my 73 is still fet by that single 10ga wire! volatage drops are noticable when ever you run say the furnace amd then turn on the water and all the lights dim, or the lights in the bathroom will slow any motor, water, vent or furnace, so simply 10ga wire, which on the 73 pulls its current from the battery selector up front rather than off the battery, means current must travel though about 40 feet of wire before it reaches my distribution pannel, its pretty lossey to say the least.
I have access to some left over 0/4 gauge cable, which may be a touch over kill but will definately not loose voltage over such short distances, with such large cable. I would replace the stock connection with a wire a fused connection right off the battery, to a buss bar which I would located inside the electrical cabinet, from there I would split power to inverter and converter/charger distribution pannel (I installed a PD 4590 box a while back) off the bus bar with the stoutest wire possible, since the connections will be super short at that point I dont think there will be much loss, and should be a huge upgrade over the stock 10ga wire. I will probably run a bit of 0 ga to the inverter and 6 ga to the distribution box. everything will be fused natrually, and I will investigate a hard line disconnect for the inverter. I have a lot of what I need left over from past projects including a car audio install so now I finally have use for that stuff
| idrob wrote on Sun, 10 April 2011 11:42 |
| Duce Apocalypse wrote on Sun, 10 April 2011 09:17 |
Thanks for the link Rob, gave me a quite a bit to look at, seems about 90% is the highest efficientcy for these things.so basically if I have 250 AH I really only have 225 usable assuming a total discharge, but probably wont wanna go more than a half cycle.
I may go with the Xantrex unit since it seems a good deal for the money, though I will probably get it off eBay since the Xantrex ProWatt SW 1kw can be had for about $250 there and since I have a $200 ebay gift card, and some ebay bux means my out of pocket will be about $25 B-) when on a budget I look for the absolute most pan free way of getting it done! though that site does have some good prices and its good to have a large selection of models to compare
| idrob wrote on Sun, 10 April 2011 00:50 |
| Duce Apocalypse wrote on Sat, 09 April 2011 12:00 |
looking to get one in the 1kw range. does anyone have recommendations?
|
Excellent site for all kinds of inverters at good prices. I understand good service also, but I have not ordered from them. A friend has.
http://www.donrowe.com/inverters/puresine.html
|
|
Glad it was helpful to you. The Xantrex units have been good in the past so you probably will be happy with that choice. We all try to save as many dollars as possible, so picking it up where the price is right for you is nothing to be sneezed at.
Do you really need a 1000 watt capacity? The smaller units may have lower standby losses, and the 90% efficiency they quote is always at higher loads, lower loads usually mean lower efficiency. So, a small inverter with a 100 watt load will be more efficient overall than a large inverter supplying that same 100 watt load. That is a general statement, and I have no real numbers to back it up, but I think it is generally true.
Be sure to have a way of disconnecting it, and a fuse in the circuit. Those costs are extra, but the safety is important.
|
73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA
[Updated on: Tue, 12 April 2011 10:12] Report message to a moderator |
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