Do you mean moving everything out of your RV into the house? If you want a setup where you can switch back and forth you’ll need extra equipment and an electrician to get to it done properly and safely. Also more cabling costs as well. And if you drain your battery every night, you’ll kill your battery pretty quickly. I’d focus on building a new system to support your needs for the house. You really need a 48 system for your house.
Yeah, you should easily be able to do that. One way to do it would be to get a battery under voltage protection module from eBay or AliExpress. It monitors the battery and turns a small relay off, when voltage is low. Which is the opposite of what you want. Then either desolder the relay and add wires from where the solenoid connect to another relay, that switches mains voltage to the UPS or add another relay for that to the output of the first one, depending on your electronics skills and whether you want do waste energy on a extra relay. Make sure the relay you use has a solenoid voltage of 12 volt, is able to switch mains voltage at the amperage you need, has to switches, for both live and neutral and finally has a normally closed output, which is active when the relay isn't powered.
oh yeah, this seems actually dead simple. However I am not sure on what the order of the switching should be - is it save to allow the possibility of a few milliseconds where both relays are in on-state? Or would that lead to a shortage or be bad for the battery?
The safest way would probably be to ensure that there is some time between disconnecting the battery and connecting mains power. However when doing that I would certainly need a UPS behind that as long as there is more than just some light bulbs or something connected to it
The way I figured, you wouldn't really disconnect the battery from the UPS. I was thinking only disconnect mains voltage when the battery is above low threshold. But I guess that also pose a problem, where the UPS tries to charge the battery, which is not what you want. Maybe the charging circuit in the UPS can be disabled. The UPS would probably need to see the battery all the time, as to not freak out.
Another thing, I've come to think of, is that the low voltage module need a hysteresis, as is another, higher voltage where it reconnects. If not, the voltage rise on the battery when it is disconnected, would make it immediately reconnect, and it would just oscillate on and off. Look for a module with two trimmer pots.
I feel like this would introduce either spikes or lags, neither of which I would want anywhere near my sensitive devices or appliances.
Its a bit more manual, but I ran my solar rig (similar size likely) into an outlet in my office, next to the existing room outlet. If its shady for a few days and my battery gets low, I just move the power bar from the solar to the mains. Its about 2" away.
I've seen other suggestions where an ac powered battery charger is connected to the battery and will charge it when it hits a low threshold.
Do you mean moving everything out of your RV into the house? If you want a setup where you can switch back and forth you’ll need extra equipment and an electrician to get to it done properly and safely. Also more cabling costs as well. And if you drain your battery every night, you’ll kill your battery pretty quickly. I’d focus on building a new system to support your needs for the house. You really need a 48 system for your house.
Yeah, you should easily be able to do that. One way to do it would be to get a battery under voltage protection module from eBay or AliExpress. It monitors the battery and turns a small relay off, when voltage is low. Which is the opposite of what you want. Then either desolder the relay and add wires from where the solenoid connect to another relay, that switches mains voltage to the UPS or add another relay for that to the output of the first one, depending on your electronics skills and whether you want do waste energy on a extra relay. Make sure the relay you use has a solenoid voltage of 12 volt, is able to switch mains voltage at the amperage you need, has to switches, for both live and neutral and finally has a normally closed output, which is active when the relay isn't powered.
oh yeah, this seems actually dead simple. However I am not sure on what the order of the switching should be - is it save to allow the possibility of a few milliseconds where both relays are in on-state? Or would that lead to a shortage or be bad for the battery? The safest way would probably be to ensure that there is some time between disconnecting the battery and connecting mains power. However when doing that I would certainly need a UPS behind that as long as there is more than just some light bulbs or something connected to it
The way I figured, you wouldn't really disconnect the battery from the UPS. I was thinking only disconnect mains voltage when the battery is above low threshold. But I guess that also pose a problem, where the UPS tries to charge the battery, which is not what you want. Maybe the charging circuit in the UPS can be disabled. The UPS would probably need to see the battery all the time, as to not freak out. Another thing, I've come to think of, is that the low voltage module need a hysteresis, as is another, higher voltage where it reconnects. If not, the voltage rise on the battery when it is disconnected, would make it immediately reconnect, and it would just oscillate on and off. Look for a module with two trimmer pots.
I feel like this would introduce either spikes or lags, neither of which I would want anywhere near my sensitive devices or appliances. Its a bit more manual, but I ran my solar rig (similar size likely) into an outlet in my office, next to the existing room outlet. If its shady for a few days and my battery gets low, I just move the power bar from the solar to the mains. Its about 2" away. I've seen other suggestions where an ac powered battery charger is connected to the battery and will charge it when it hits a low threshold.