A 5kWh 96V LiFePo4 battery fell into my lap, a it's a SonnenModul4. Ever since I've been studying up on solar systems, as I plan to go to Africa, to live and work from a solar powered camper, exclusively, for the next 5 years. I never thought I'd be able to put in such a powerful and reliable battery. This feels revolutionary.
I presume a solar system built around such a battery looks like this:
- a single string of 3 or 4 solar panels of around 40V each, each with 375W. They have to fit a 170x400cm roof area. During most of the day that should give me 750W or 1000W, ample.
- a MPPT charger with overcharging protection to connect the PV to the battery. It should be able to comfortably work with 160V DC in
- an inverter, to give me 230V from the battery voltage. at least 2kW allows me to cook without switching of appliances like the fridge. I could even run a basic air conditioning.
I suppose this battery has a BMS to re-balance the cells, but I don't know about any protections like overcharge or over-current (short-circuit). My questions:
- is the system complete? would I need anything else?
- what protections should I take care of?
- what devices would be recommended?
- maybe there is an inverter with an integrated MPP tracker?
- is there a way to run the inverter directly of the solar panels, switching to the battery only when needed?
- bonus: how to keep the solar panels cool (as they'll get very hot)?
Though I work with electronics, I'm still a newbie when it comes to best practices, the market and how to layout a system. Any advice would likely be taken ;-)