Are you “flatlining” with inadequate storage? Common problem for off grid systems is plenty panel, not enough storage. If the batteries are reaching full charge and you’re running on the panels the rest of the day, yup, need more stuff to hold electrons.Yeah until I get bigger and more panels it wouldn't help anyway so it's fine staying off grid, I do have it set up to use the grid, just can't sell it back, I'm having a hard time keeping these batteries charged as it is so that's my next purchase
There’s some debate about higher voltage storage having less losses, but that usually requires more expensive inverter hardware. I want to build a 48V system aimed at the middle ground of hardware costs and efficiency. 48VDC is a good level for conversion to 120VAC. I tapped 48V off a 125VDC battery bank in some outdoor switchgear to power an inverter to serve as a UPS on a programmable control system for emergency power in a VA hospital. Worked beautifully. The DC was for control of the breakers, and the PLC sequenced the whole system on outages. I did that system in the mid 80’s when PLCs were scary things, and inverters made engneers slobber.