I have talked about Signature Solar before and I own three inverter/chargers from them. What they have been selling are rack-mount batteries to go with these systems. But, they have a new product: a wall-mount battery. 48V, 280Ah battery for your home. The estimated cycle life is greater than 8000 charge/discharge cycles. Price is $4000.
No payola here — I am just a satisfied customer. If you are interested in this or other “power-wall” like items, check out https://signaturesolar.com