Post by Starflyte68 on Aug 22, 2022 20:33:21 GMT -8
I am completely revamping both AC and DC systems in my 1968 Shasta. All lights are getting switched over to DC (12V)). AC will be for a few outlets, an air conditioner, probably the refrigerator and a microwave (though there are 12V options I might consider).
Trying to describe this question as simple as possible... in short, I want my 12vDC to be powered via 110vAC Shorepower when available, but also to run my 110vAC fridge and outlets via the 12vDC when boondocking. Thus I need a converter (or at least a battery maintainer) for 110vAC to 12vDC and an inverter for 12vDC to 110vAC. Diagrams help, even when roughly jotted with a cat jumping repeatedly on the desk. So the image below is an attempt at where my mind is currently at. The red letters refer to specific questions.
Question A: Would one of these switches [ www.amazon.com/gp/product/B0B2DJ4KBM ] be necessary? Otherwise, the 110 would potentially be supplying the wrong end of the inverter - I don't know if that is a problem or not. I suppose also the inverter power would go back through the breakers and end up supplying the air conditioner too (which I don't want as it would put too much load on my batteries). If not that switch, then what?
Question B: Do I need something to regulate power flow going to the batteries? Or do they simply charge up to match the voltage in that part of the system? If I do need something, then recommendations are welcome!
Last Edit: Aug 23, 2022 6:34:30 GMT -8 by Starflyte68: fixing link
First figure out which Converter you want and then which Inverter you want. You will need a transfer switch to use one at a time. Big motor homes often have both; a good place to ask questions. A maintainer will not provide enough power for that big of a DC system. They are more for maintaining the battery.
Your link doesn't work for me.
A Inverter powering what you have listed will take a large battery bank unless you upgrade the batteries. There are some pretty fine batteries available today, do your research. Many can cost $1500 and up each for the best. If you are going to be using the batteries to power a lot, worth the investment.
Air conditioners normally run on a 20 amp circuit with appropriate wiring. You can plug it in separately (bypassing the trailer electrical) to the campground pedestal to prevent overloading the system.
Most converters today have a built in smart charger, so they auto regulate the battery charge.
Study the inverter and converter manuals and also research what others with this type of system have done.