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Contractors that install rooftop or ground-mount solar arrays together with a home battery, so the system both offsets bills and rides through outages.

Companies that will add a battery to a home without selling a new solar array, including retrofits onto existing PV systems and storage sized purely for backup or time-of-use savings.

Installers whose own websites advertise Tesla Powerwall installation and Tesla certification, usually alongside the Tesla app for monitoring and storm watch.

Companies listed in Enphase's certified installer locator that handle IQ Battery and Enphase Ensemble microgrid equipment, generally paired with Enphase microinverters.

Installers that carry the FranklinWH aPower battery and aGate controller, a whole-home system popular for backing up an entire panel rather than a few critical loads.

Firms that specifically market whole-home or whole-house backup, sizing storage and controls to carry the full electrical panel instead of a partial backup subpanel.

Installers experienced with standalone off-grid and microgrid power systems for cabins, remote properties and homes with no reliable utility service.

Large multi-state and nationwide residential solar and storage companies that operate through regional branches or a dealer network.