Hello,
I'm designing a PV system to charge batteries. My house is attached to the grid, but the power goes out frequently, and I would like the security of a battery bank. The PV system is only going to power a few circuits in the house.
Here is my question: is there a way to charge my batteries with the grid if my loads out strip the PV electricity? For example, if the batteries fall below 60% charge, is there a device that could add grid power to boost batteries back up to 60%, and hold them at that level until more electricity could be gathered from the sun?
I believe my inverter will not allow the batteries to be discharged past a set level. Is there a device that would connect grid power to my loads once my inverter stopped pulling power from my batteries because their charge was to low?
Thanks for the help.