| [GMCnet] Riddle me this one.....inverter [message #346134] |
Tue, 06 August 2019 23:49  |
glwgmc
Messages: 1014
Registered: June 2004
Karma:
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Senior Member |
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At the GMCWS rally at Seven Feathers Casino at Canyonville, OR, in October I will give a presentation on whether and how to update your GMC to modern electronically controlled lithium batteries. In that presentation I will cover in detail things like converter/battery chargers, inverters, smart combiners and etc. if you can get there it might answer most of your questions.
The very short version is your GMC has both a starting battery that supplies power to start your coach, the chassis lights, and dash heater. You also have a house battery bank which could be anything from one to four batteries, some of which could be up front and/or in the rear. That house battery bank supplies 12vdc for lights in the house portion of your coach, the furnace, the refer if so equipped and other 12vdc appliances like roof vents, etc. you also have a power cord which can be plugged into a shore power source to supply 120vac for household appliances like a microwave and roof ac. When no shore power is available you can turn on your generator to supply 120vac for the same purposes.
Each of these are independent but can be combined in some circumstances. When 120vac are available a device called a converter/battery charger will keep the house batteries charged and also supply 12vdc to the house 12vdc circuits. GM never supplied an inverter but some POs have. That device takes 12vdc from you house battery bank to supply 120vac to power house appliances (but not the ac) for a short time. 12vac lead acid batteries are not well suited for powering an inverter for a bunch of reasons beyond the scope of forum post.
Inverters do not charge batteries. There is a lot more to it than this but perhaps this will help in your understanding of the two 12vdc systems and the two or three 120vac systems in your GMC. Best bet is to attend a rally and ask questions there.
Hope this helps
Jerry
Sent from my iPhone
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Jerry & Sharon Work
78 Royale
Kerby, OR
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