Solar hookup, battery backup & energy storage in Castro Valley, Alameda County. Local electricians, upfront pricing and fast scheduling.
(833) 652-8933 Request a quoteSolar and battery storage are common on Castro Valley rooftops, but the electrical side is where projects stall. Phasethree Electric handles the electrical hookup for solar systems, main panel upgrades and derates, backup gateways, critical-load sub panels and battery backup installation for homeowners and solar companies in Castro Valley and Alameda County.
AC and DC disconnects, inverter wiring, rapid shutdown, line-side taps or breaker interconnection, panel derates and labeling that passes Castro Valley inspection and utility interconnection the first time.
Tesla Powerwall, Enphase IQ Battery, Franklin and Generac PWRcell systems wired for whole-home or essential-load backup so lights, refrigerators, internet and medical equipment stay on through PSPS events and storms.
Many homes need a 200 amp panel, a bus bar upgrade or a main breaker derate before solar can be connected. We complete that work and coordinate with your installer. Also serving nearby San Lorenzo, Hayward, San Leandro, San Ramon. Call (833) 652-8933.
We provide solar & battery backup electrical throughout Castro Valley and the surrounding communities of Alameda County.
Usually yes. AC-coupled batteries work with most existing solar systems; we evaluate your inverter and panel first.
One battery typically covers essential loads. Two or more can run most of a Castro Valley home including some HVAC.
Yes. We subcontract main panel upgrades and electrical prep for solar companies across Alameda County.
“Our restaurant lost power on a Friday night. They had the failed contactor replaced and the walk-in back up before we lost any product.”
Angela M.“Our breaker kept tripping every evening. The electrician found a bad neutral in about twenty minutes and had it fixed before dinner. Fair price, no upsell.”
Maria G.“Tesla Wall Connector installed in the garage in a couple hours. Clean conduit run, app set up, and they showed me how to schedule off-peak charging.”
Samantha L.Upfront pricing · Same-day service · 24/7 emergency response