Residential Home Battery Systems
At First Response Solar we install battery systems in two different ways for homeowners depending on their needs and what they are wanting out of the system. The first way we install battery systems is called a grid tied (energy saver) battery that is only meant for lowering a homeowners electrical bill. This battery design is less costly but when PG&E's power grid gets turns off, the homeowner will not have power. The second way to install a battery system is called a partial and full home backup battery that is meant for lowering a homeowners electrical bill but also provide the homeowner power to their house in the event of a grid outage. This battery design is more expensive because a transfer switch will be added to the battery system, First Response Solar will have to rewire a portion of the homeowners house and generally the homeowner will need a larger battery system if they want to keep a reserve amount in the batteries in case of an outage.
Partial/Full Home Backup System
A full or partial home battery backup system provides backup power in the event of a power outage and also will be used to reduce the homeowner electrical bill. It works by storing excess solar energy generated by solar panels during the day, and using that energy to power the home when the sun is not shining or during a power outage.
A full home battery backup system is designed to power the entire home during an outage, while a partial home system is designed to power only essential appliances and devices, such as lights, refrigerators, and medical equipment.
Both full and partial home battery backup systems require a transfer switch, which is a device that would block any power from going back to PG&E in the event of an outage. The electrical in the house will also have to be rewired to allow the battery and solar to provide power to the house or a portion of the house when the utility grid goes down. The additional equipment cost and material and labor for requiring the house makes these systems more expensive.