Bay Area Solar Installer Trusted by 1,000+ Homeowners Since 2010

For homeowners who buy solar, the federal Residential Clean Energy Credit ended for systems installed after December 31, 2025. You still have options: a prepaid PPA through HDM Capital can lower your upfront price, per HDM's agreement terms, and home batteries may qualify for California's SGIP rebate. For your own tax situation, check with a tax professional.

Both. Ally is a licensed solar contractor (C-46) and a licensed electrical contractor (C-10), license #806465. Our own electricians handle solar, batteries, panel upgrades, EV chargers and electrification work.

Yes. We specialize in them. We plan mounting around your roof type and structure, including steep pitches, clay and concrete tile, standing seam metal and flat roofs with insulation. Every roof penetration is covered for 10 years.

Most of our home systems fall between $2.60 and $3.50 per watt. A 6 kW system, for example, runs about $15,600 to $21,000 before rebates or financing. Your exact price depends on roof type, equipment and electrical work.

For most homes, yes, but the design is different now. PG&E pays less for the extra power you send to the grid, so pairing solar with a battery lets you use more of your own energy during expensive evening hours.

Electrifying your home means replacing gas appliances with electric ones, like a heat pump for heating and cooling, a heat pump water heater, an induction range and an EV charger. Solar and a battery can then power much of it with your own energy.

Often, yes. Knob and tube wiring wasn't designed for today's electric loads, and many homeowners replace it before adding an EV charger, heat pump or induction range. We inspect what you have and tell you what's needed.

Not always. We start with a load calculation. Some homes have room, some need a main panel upgrade, and some can use a SPAN smart panel to manage what runs at once.

Start with your electrical panel. Knowing its capacity tells you what your home can add, and in what order, so solar, a battery, an EV charger and heat pumps all fit without redoing work.

Yes. During an outage, your battery powers the circuits you choose to back up. We help you pick them during design.

It's an agreement through HDM Capital in which HDM owns the system and you pay a lower prepaid amount for its power. Ownership transfers to you in year 6, per HDM's agreement terms, and we're happy to explain how it works.