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| [GMCnet] Interesting electrical/battery issue [message #259746] |
Fri, 22 August 2014 09:44 |
glwgmc
Messages: 1014
Registered: June 2004
Karma: 10
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Senior Member |
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Matt,
Thanks for your two very helpful responses. The part about the modern switching inverter design possibly setting up a harmonic interference with the inverter microwave and the perhaps weak batteries was especially informative. You are right, that Heart was a big, heavy sucker so today's Chinese switching sine wave inverters, even a supposedly good one like this Xantrax SW, may just not be up to the task with an inverter microwave. I have AGMs in the Clasco (rolled start and a single 4D plate house) and a 1994 non-inverter convection microwave so may retry there. I will first try to run that microwave off of the Royale inverter and wet cell batteries using a heavy extension cord on the AC side, then will move the inverter from the Royale to the Clasco and see if it will run that microwave using the AGM house battery. That should begin to narrow down the possibilities.
The Royale is decked out with all the energy saving things like LED lighting throughout so that wet cell battery bank will last a long time yet if I don't try to run the heavy load of that microwave.
This is all a bit of a Don Quixote quest anyway as the generators work perfectly well in both coaches so it would be no problem to just turn them on, use the microwave, and turn them off. But, I had to try.....
Among several interesting things I have learned while on this quest is just how expensive large diameter copper wire has become. It was over $100 to make up the 00 set to interconnect the four batteries, send power to the inverter, ground the inverter back to the load side of the shunt and run the negative from the battery bank back to the ground side of the shunt. The longest two of these wires was 30", two were 18" and the other three 12".
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
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Jerry,
Before the boat business died a painful death as a result of the depression, I was keeping about an half a dozen boats all with Lifeline AGM house
banks. (The main engine start - if I had anything to do with it - was a rolled cell AGM.) Here is where the unfortunate problem is.... None that I
know of had had to be replaced. The oldest is now about ten years and the only older have moved out of my area. But I do know from (in your face)
experience that they will not suffer for the deeper discharge, and the internal resistance - even on the flat plate cells is lower than a flooded
cell. Rolled cell have REAL low internal resistance, but their capacity per unit volume sucks.
The only thing bad about them is the cost of acquisition.
Matt
--
Matt & Mary Colie - Members GMCMI, GMCES
'73 Glacier 23 - Still Loving the Applied Rear Brake Control Arms
SE Michigan - Twixt A2 and Detroit
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Jerry & Sharon Work
78 Royale
Kerby, OR
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