This estimate is based on the current grid electricity price of £0. 245/kWh (as of October 2024), which translates to roughly £2,359. . The BSLBATT PowerNest LV35 hybrid solar energy system is a versatile solution tailored for diverse energy storage applications. Equipped with a robust 15kW hybrid inverter and 35kWh rack-mounted lithium-ion batteries, the system is seamlessly housed in an IP55-rated cabinet for enhanced protection. . As to give an estimate of system costs please see below our DIY Solar System Price Estimator / Solar Price calculator. Built to Last 15kWh Capacity: Store enough energy to power your home through outages or peak demand periods. The 25 mm rack frame perforation along with internal accessories. . Here are some 15kWh (or very close to 15kWh) battery options available in the UK, with their prices: Notes: Advertised as “lowest UK price,” works with various inverters and uses 302Ah cells.