What type of battery is your house battery?
I have a Sunsaver Duo controller and, out of the box, it wants to set the float voltage at 13.7, which is a bit high for most AGM batteries. Most AGMs should be floated at about 13.2-13.4. But if you have a standard lead-acid battery, 13.7 is probably just fine. Just keep an eye on the water levels. I dont know about other Sunsaver controllers; I am speaking to the Sunsaver Duo. It would be wise to research it if you plan on owning an AGM.
The SS Duo can bet set for a lower float voltage........but, unfortunately, it requires purchasing a module for interfacing the unit with a computer to dial it down. And it's an RS-232 serial interface. I dont think I have owned a computer with a serial interface since about 2006. So, that would mean an adaptor to a USB port AND loading a driver.
I do like the Duo capability to charge two isolated battery banks. I have the second "output" of the Duo going to the battery isolator in my camper. That charges the truck batteries when I want it.
