| [GMCnet] Coach Batteries [message #260161] |
Tue, 26 August 2014 20:21  |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
|
Senior Member |
|
|
We were in the full hookup RV park behind the three event buildings in space E22. They only recently added those full hookup sites to the fair complex. Very nice, lots of sites and just like a normal upscale RV park except the spaces do not have large patio separation as they are designed for the event participants. We were in our 78 Royale (cream white with a burgundy stripe). Hope to catch you at the next one.
This battery, load and inverter thing is becoming quite interesting. If you say my post earlier today I was fighting what I thought was a battery capacity issue (is a 460 amp hour bank in the Royale) or a wiring issue (I wound up changing out all the battery interconnect cables to 00 size with soldered connectors) or an inverter issue (I changed out a perfectly good KISMIE 2000 watt pure sine wave inverter for a more expensive Xantrax SW 2000) only to find out the real issue was the microwave manufacturer (Panasonic) drastically under rated the amp draw on their inverter microwave units. What the plate showed as a 12.5 amp draw was really a 17 amp draw that eventually reached 12.5 amps after the microwave was on for over three hours and that is why my system would not run that inverter and why I was seeing a large voltage sag.
I don't know how a manufacturer could get that past UL. Obviously they wanted the consumer to think it was fine to plug into a 15 amp wall plug and did not want to be saddled with the 20 amp plug that should have been on that unit. I guess they thought many 15 amp breakers would hold the 17 amps draw long enough to pop popcorn or whatever people normally do with such units. And, they must of thought the cord and 15 amp plug they put on the microwave would reject the resistance heat long enough not to burn someones house down, but man, that just makes no sense to me. I could have saved a lot of money and aggravation if I had known that the plate on the microwave was bogus. It would have been lots cheaper to buy a Sharp convection microwave that is properly rated to replace the Panasonic bogus rated unit.
Jerry
Jerry Work
The Dovetail Joint
Fine furniture designed and hand crafted in the 1907 former Masonic Temple building in historic Kerby, OR
Visitors always welcome!
glwork@mac.com
http://jerrywork.com
,,,,,,,,,,,,
That wouldn't have been you we missed would it?
Hal
--
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Jerry & Sharon Work
78 Royale
Kerby, OR
|
|
|
|
 Re: [GMCnet] Coach Batteries [message #260188 is a reply to message #260161] |
Wed, 27 August 2014 00:04  |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
|
Senior Member |
|
|
Jerry, I feel your pain  I have a Convection/microwave that draws WAY more than name plate current and it has pretty much squashed my inverter ideas. I just rebuilt the kitchen cabinet and built the oven into it so don't relish buying a new oven and redoing the woodwork. I've about decided that I need to run the genset when using the oven. In my SOB I try to run the gen if we do much micro oven use because of the huge hit it can take on the battery bank-and I have a 1200 ah bank. I have a Xantrax 1000, 1800 (Trace) and SW 2500 Trace on the shelf and the little guy seems to make the most sense for our GMC at this point.
As for UL listings,you'd be shocked at what gets through. Their job is not what people expect. In my 'former' life,(working) we had questioned UL on many occasions and some of their responses were real eye openers.
Sorry we missed you in the park. The GMC we saw was in the grass but had no power. We drove around but must have missed you. We were parked in the gravel with our CVC Bus group grinding away with our generators. Maybe next time.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
|
|
|
|
| Re: [GMCnet] Coach Batteries [message #260202 is a reply to message #260161] |
Wed, 27 August 2014 06:56 |
 |
Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
|
Senior Member |
|
|
glwgmc wrote on Tue, 26 August 2014 21:21<snip>
This battery, load and inverter thing is becoming quite interesting. If you say my post earlier today I was fighting what I thought was a battery capacity issue (is a 460 amp hour bank in the Royale) or a wiring issue (I wound up changing out all the battery interconnect cables to 00 size with soldered connectors) or an inverter issue (I changed out a perfectly good KISMIE 2000 watt pure sine wave inverter for a more expensive Xantrax SW 2000) only to find out the real issue was the microwave manufacturer (Panasonic) drastically under rated the amp draw on their inverter microwave units. What the plate showed as a 12.5 amp draw was really a 17 amp draw that eventually reached 12.5 amps after the microwave was on for over three hours and that is why my system would not run that inverter and why I was seeing a large voltage sag.
<snip>
Jerry
Wow Jerry,
That explains a whole lot!!
UL is a private company like NSF. Companies pay them to get the product tested and listed. If a manufacturer changes the unit without changing the model number or specifications after it was tested, the listing stands.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
