Solar batteries allow grid-tied solar energy users to reduce their dependence on utility companies. In the case of a power outage, having a backup of stored renewable energy can go a long way. The cost-saving solar power systems we design for home and business owners don’t often incorporate solar batteries, but they are great additions. As batteries like the LG Chem RESU and Tesla Powerwall become commonplace, our professionals will continue to help customers integrate them into solar power installations.
For the majority of solar systems, excess energy generated by the sun is sent back to the grid. Most utility companies use net metering which means that they’ll give a credit for that extra power in your monthly bill. With solar storage systems in your home or business, excess power from your solar panels is delivered to a solar battery. The battery only sends energy to the grid when it’s full. In the case of power outages, your home will draw power from the battery. You will only continue to use energy from the grid when the battery is empty.
Batteries like the RESU and Powerwall typically only differ in their power capacity. Capacity makes the difference of a solar battery powering essential appliances for a few hours or up to a full day. Companies like LG Chem and Tesla will also offer different warranties around how much of battery’s capacity it will be able to maintain over time.