Power outages can cause problems for many families. From refrigerators housing hundreds of dollars' worth of food, and cell phones or computers that require charging, to essential medical equipment; when the power goes off you may need ways to manage the power outage. If you are looking for a battery backup option for your solar array, PV Systems is here to help.
What does Tesla Powerwall do?
Tesla Powerwall is an energy storage device that uses lithium-ion battery technology. The most common use for Powerwall is self-powering a home. Designed to work seamlessly with solar systems, it can be either installed at the same time as a solar PV system or retrofitted on homes that have an existing solar system. Combined with a solar array, Powerwall allows owners to store the power they generated during the day and use it at night, potentially eliminating the need for grid power from their utility. The storage system can also be used for backup power, home energy monitoring, and time-of-use load shifting.
Current-generation home batteries are bulky and require more work to install and to maintain. In contrast, Tesla Powerwall’s lithium-ion battery uses Tesla’s proven automotive battery technology to power your home safely and economically. Powerwalls come with a built-in computerized control system, making them completely automated and ready to deliver less-expensive electricity when rates are high or to backup electricity during grid power outages.
One Powerwall unit can store about 14 kilowatt-hours (kWh) of energy. That means on a single charge, a Powerwall can sustain a 1 kW load (about 16 60-watt lights) for 14 hours. The average American home uses about 25 kWh of electricity every day, so many customers who want their home to be self-powered will install a solar system along with two Powerwalls, which would double the amount of energy they can store. During the day, the energy produced by the solar system will power the loads in the home and charge the Powerwall units; during the night, the loads will be powered by the storage system.
When Powerwall is utilized for home energy monitoring, the system can help the owner see where and how energy is being consumed in the home. Tesla’s mobile app shows the user his or her energy use habits and where energy use can be cut down. Another function is time-of- use load shifting, which should appeal to customers who pay peak rates to their utility. Users will be able program their Powerwall to power their homes during peak rate periods and to charge the storage system when the rate is low.