Inverter/Charger issues & options

[smac999]

Originally Posted by blondjohn

Hi Jordanbigel,

If you are planning to re-engineer for LiFePO4 (LFP) batteries in the near future, you should look carefully now at how you will integrate inverter and charging functions in the LFP system before you buy a new inverter charger. If you buy "drop-in" batteries and keep a common load and charge bus it won't matter, but for a DIY build with a centralized BMS, system level controls and safety features with separate load and charge buses, which I believe offers tremendous advantages over drop-ins, you will probably want CAN-bus control and possibly even a two unit system with a separate charger and a separate inverter.

I'm currently in the design phase for a transition to LFP and I'll be re-using my old Prosine. Absolutely doable but definitely not "state of the art."

you can make a charge bus, load bus, and inverter bus. and have the inverter bus shut off from either the charge or load bus fairly simply. I have desinged that before but ideally you'd have a 2nd charge source so if the load and inverter bus shut off from low voltage. the 2nd charger can still charge on the charge bus. (solar, or engine charger etc) once the voltage gets back to spec the load and inverter bus will turn back on and the inverter can start charging too.

[blondjohn]

Originally Posted by smac999

you can make a charge bus, load bus, and inverter bus. and have the inverter bus shut off from either the charge or load bus fairly simply. I have desinged that before but ideally you'd have a 2nd charge source so if the load and inverter bus shut off from low voltage. the 2nd charger can still charge on the charge bus. (solar, or engine charger etc) once the voltage gets back to spec the load and inverter bus will turn back on and the inverter can start charging too.

Thanks for sharing your ideas. I think I may go a different direction with the wiring based on the specifics of my situation and I will post a new thread to discuss Prosine integration in the Lithium forum. Hope to see you there.