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Solar Electric Systems: Utility Intertie with Battery Back-up
Utility Intertie solar electric systems with battery back-up utilize photovoltaic panels to generate electricity. Groups of photovoltaic panels or “arrays”, convert sunlight into Direct Current( DC) electricity. In this case, low voltage DC current is first used to charge a battery bank. The inverter, which synchronizes with the utility, turns the DC into AC electricity for use in the home.
In most cases, the systems will be “Net Metered”. When sunlight energizes the system, the first priority of the inverter is to power any electrical loads in the home or business. If an excess amount of energy is being produced, then electricity is sent out onto the utility grid, spinning the meter backwards. When there is not enough sunlight to power all the electrical loads in the house, electricity is drawn from the utility as needed. Each month, after all the ins and outs from the solar system, the meter reads the "Net" kWh usage for the home or business.
In the event of a power outage, the inverter automatically and instantaneously disconnects from the utility. The inverter then uses the battery bank to power a critical load panel. Critical loads usually include the basic necessities of water pumps, heating sources, and lighting. Critical loads often include refrigerator or freezer to preserve food, and a few outlets for radios, computers or electrical devices. The system will automatically reconnect to the utility when power returns.
Advantages:
- Producing clean and reliable power from the sun
- Lowers monthly electrical bill
- Security for family and business during utility outages
If you are interested in purchasing a utility intertie with battery back-up solar electric system please go to the forms tab and fill out the appropriate form.