The Travco came with two batteries, one up front for the engine and coach, the other in the back for the generator. A previous owner had installed a 2 gauge wire from the engine battery to a battery switch under the sink, with another 2 gauge wire coming from the generator battery to the same switch. I added a third 1/0 wire from the four inverter batteries, that I tied together with the inverter under the bed, to the switch. I wired the engine/coach battery as Main, the inverter batteries as #1, and the generator battery as #2. At the moment I don't have any battery isolators so, I have them all connected together so that my solar panel and charge controller can keep them charged (they also get charged when the engine or generator run). Also, since I am connected to the grid while at home, I use a battery charger to keep them topped up (like a charger/converter would... the charger that came with the Travco died). Since I use the Travco as an office and play the stereo and use the lights and soon the furnace, the batteries would soon die without a charger.
Battery Switch under the sink for the three battery sets.
Under the bed: engine fluids in crate, 35 gallon water tank (from a Winnebago, has level sensors, but not connected), leveling blocks in bags, bottle jack, inverter batteries tied in parallel, 1500 watt inverter, electric water heater, 2 gallon water pressure expansion tank.
One of my next projects will be to connect the 1500W modified-sine wave inverter to the 120v electrical system. Currently I must run an extension cord to where I need the power (if running the inverter for power), so I want to design, build, and put in an automatic transfer switch for the inverter to connect it without the generator or utility power connected.
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