Adding solar to existing Class B RV + Using to charge Anker powerbank?
Just bought a 2006 Class B Sprinter based RV. It has an Onan 2800 watt propane generator and 30 amp shore power connection. It does not have an inverter. I am in the process of upgrading all the lighting to LED. Only 120 volt appliances are the AC, Microwave, and TV. The change controller is an Intellapower 9245C.
The current house battery is a DC24 (75 amp hours) but the battery box is bigger (16 x 7.5 x 9) than the battery and has a sticker that says DC34. Unsure of the age of the battery. The house battery is located in a box behind the front passenger seat and the rest of the electrical system is in the rear of the vehicle by the left cargo door.
I also have an Anker PowerHouse II 400 power station I bought to power my laptop, TV, and hotspot.
Overall, I want to add some solar to my RV to extend my time between having to use shore power. Not sure of how long I will own the RV so wanting to keep things simple and provide an upgrade path if I want more capabilities in the future.
I was thinking about gluing some flexible panels to the roof (maybe 200-300 watts).
Now here are my questions:
I have two battery banks obviously
The house power system. I figure mostly used at night for lighting and furnace fan. Maybe day use of fan, water pump.
The Anker power system I plan on cycling the most and using during the day a lot but is capped at 65watts charging via the DC charge power. Looks like I can also connect via USB-C to get it up to 130 watts total.
For the house battery, it seems (?) like all I need to do is get some panels on the roof, put a charge controller on there, and connect it to the battery. Does it really matter if I patch it in at the charge controller, battery box, or splice in to the wire running underneath the van?
Second, what should be my strategy for charging both battery devices? Iíve seen some charge controllers with a DC power port. I rather not use the lead acid battery to charge a lithium battery.
Also, I was hoping for a low or no drill solution. The roof has ridges so I was unsure how I would adhere the panels.