Here is an example of the use of EV PowerPak batteries in an off-grid installation.
4 x EVG12V300AH batteries connected in series for 51V nominal to a BCU-RAPS-16C battery control unit.
~15kWhrs of storage in total.
A DC Coupled system using a Victron MPPT and Selectronic Inverter.
EV Power batteries are versatile.