Single-phase uninterruptible power supply project for a 5 kW house and main switchboard refurbishment. SmartWatt eco 5K 48V 80A MPPT double-conversion inverter with voltage stabilization (https://tok-shop.ru/product/sweco5k/), 4 x 150 Ah batteries (https://tok-shop.ru/product/11022/).
Battery life calculator: https://tok-shop.ru/calcvr/