[cyberax]

You absolutely can do that. You still need a charging controller and a BMS, obviously. But you can avoid the AC round-tripping.

[nanomonkey]

Nice, the 48V batteries I have already have BMS's...any suggestion for a nominal 48V DC optimizer and charge controller?

[cyberax]

Tigo is known to work. I've heard that SolarEdge DC Optimizers don't work without a SolarEdge inverter connected to them.