A solar battery connects to your inverter to store excess power generated throughout the day. You will use this energy when your solar panels cannot produce enough power to meet your needs. You will find different solar batteries on the market. We recommend using the Alpha ESS Smile. These batteries have an excellent range of hybrid and retrofit solutions for on-grid and off-grid use. The batteries are ideal for commercial and residential solar systems, and AlphaESS is one of the pioneer manufacturers in the energy storage market. The Alpha ESS Smile batteries also come with a 5-year product warranty and a 10-year battery warranty for your peace of mind. Solar Batteries Penrith