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Solar power during a utility blackout

“What about solar during a utility failure?”

For safety, grid interactive solar systems are designed to immediately disconnect and shut off if a utility grid failure is sensed. The system will automatically restart a few minutes after grid power is restored. As a result, no power will be available from the solar panels during utility outages. This protects utility workers who may be out working on power lines.

With new SMA transformerless inverters, a solar system can provide limited daytime power during a blackout. These inverters can be connected to household loads — like a fridge, lights, computers — and make up to 1,500 watts available while the sun shines.

Solar energy systems can provide around-the-clock, independent backup power during utility outages if they are connected to an appropriately-sized battery bank to absorb and store the energy they produce. Natural gas and propane generators are another option for backup power. We have installed solar panels and a generator on numerous jobs, when secure power is an absolute must-have.

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