Solar Battery Backup Storage in Sunnyvale and the Bay Area

Home Pro Roofing and Solar installs home battery backup systems for homeowners in Sunnyvale, Mountain View, Los Altos, Los Altos Hills, Saratoga, Palo Alto, Cupertino, Santa Clara, San Jose, Redwood City, San Carlos, Belmont, San Mateo, Menlo Park, Fremont, Newark, and Union City. We install Tesla Powerwall 3, Enphase IQ Battery, FranklinWH, and QCells Q.HOME CORE — four of the most trusted battery systems available, all US-manufactured. Under California's NEM 3.0 rate structure, battery storage is the most effective way to maximize the value of your solar system. Licensed California Contractor CSLB #1050229. Call (800) 650-3134 for a free estimate.

Why Battery Storage Is Essential in California in 2026

California's NEM 3.0 rate structure changed the math on solar. Under the old rules, homeowners got strong credits for solar energy exported to the grid during the day. Under NEM 3.0, those export rates dropped significantly. The result is that a solar system without battery storage leaves a substantial amount of value on the table every single day.

A battery changes that equation. Instead of sending excess solar energy to the grid at low rates, your battery captures it. When electricity rates peak in the evening, your home draws from the battery instead of the grid. The result is lower monthly bills, greater energy independence, and backup power when PG&E goes down.

Save money during peak hours PG&E's time-of-use rates charge significantly more for electricity used in the evening. A battery lets you use stored solar energy during those high-cost hours instead of paying peak rates.

Stay powered during outages Without a battery, most solar systems automatically shut off when the grid goes down — even if the sun is shining. A battery keeps your essential circuits running during PG&E outages, planned shutoffs, and extreme weather events.

Maximize your solar investment Under NEM 3.0, battery storage is no longer optional for homeowners who want strong returns from their solar system. It is the tool that makes solar work the way most homeowners expected it to work before NEM 3.0 changed the rules.

Reduce grid dependence long-term As PG&E rates continue to rise, storing and using more of your own solar energy insulates you from utility price increases over time.

Battery Systems We Install

All four systems we install are US-manufactured — an important consideration in 2026 given supply chain and tariff concerns affecting imported equipment.

Tesla Powerwall 3

The Tesla Powerwall 3 is a whole-home backup system manufactured at Tesla's Giga Nevada factory. It features an integrated solar inverter, fast response times, and advanced energy management through the Tesla app. The Powerwall 3 is one of the most recognized and widely installed home battery systems in the Bay Area.

• 13.5 kWh usable storage capacity
• Integrated solar inverter — no separate inverter needed for new solar installations
• Whole-home backup capability
• Real-time monitoring via Tesla app
• Manufactured in Nevada

Enphase IQ Battery 10C

The Enphase IQ Battery 10C is the newest fourth-generation Enphase battery, now manufactured in the United States. It delivers 10 kWh of usable energy and 7.08 kW of continuous power in a compact footprint that takes up 62% less wall space than the previous generation. It is the ideal pairing for homes with Enphase microinverter solar systems and qualifies for the domestic content bonus tax credit.

• 10 kWh usable storage capacity
• 7.08 kW continuous power output
• Compact design — 62% smaller footprint than previous generation
• Built-in neutral-forming microinverters for backup functionality
• Manufactured in Texas with 45% or more US-sourced materials
• 15-year limited warranty

FranklinWH aPower 2 and aPower S

FranklinWH is one of the most impressive battery stories in the industry right now — and it is happening right here in the Bay Area. FranklinWH manufactures its aPower 2 and aPower S batteries in Santa Clara, California, with circuit boards produced in nearby Milpitas and battery enclosures diecast in Oklahoma. Nearly every component is made in the United States.

The aPower 2 delivers 15 kWh of usable capacity and 10 kW of continuous power — enough to run most Bay Area homes including central air conditioning. The aPower S adds direct solar DC integration for simplified installation. Both carry a 15-year warranty.

• 15 kWh usable storage capacity per unit — stackable up to 225 kWh
• 10 kW continuous power — runs central AC and major appliances
• Compatible with most solar inverter brands including Enphase and SolarEdge
• Manufactured in Santa Clara, CA — local supply chain
• 15-year warranty
• Expanding production planned for 2026

QCells Q.HOME CORE G3

The QCells Q.HOME CORE G3 is the latest generation of QCells' residential energy storage system, now manufactured domestically at a facility in Michigan. It is an ideal pairing for homes using Axia by QCells solar installations and qualifies for the domestic content bonus tax credit. The system uses scalable LFP battery modules for flexible sizing.

• Scalable LFP battery storage from 10 kWh up to 20 kWh
• Pairs seamlessly with QCells solar panel systems through Axia by QCells
• Domestic-content eligible — manufactured in Michigan
• 15-year product and performance warranty
• Monitored and managed through the Q.OMMAND app

Add Battery Storage to Your Existing Solar System

You do not need a new solar system to add battery storage. We can integrate a battery backup system with most existing solar installations, even if we did not install the original system. Our team evaluates your current setup and recommends the right battery based on your existing inverter type, energy usage, and backup goals.

Works with most inverter typesOur battery solutions integrate with Enphase microinverter systems, string inverter systems, hybrid inverters, and most major solar brands installed in Bay Area homes.

No new solar panels requiredBattery storage adds value to your existing system by storing the energy your panels already produce rather than sending it to the grid at low NEM 3.0 rates.

Best time to add storageIf you are replacing your roof or coordinating a solar panel removal and reinstallation project, adding battery storage at the same time is the most cost-effective approach. The electrical work is already open and a separate mobilization cost is avoided. Learn more about solar panel removal and reinstallation.

Battery Storage and the Prepaid Solar PPA — ITC Value Included

For homeowners going solar for the first time, the Prepaid Solar PPA through Solar Tech is the strongest way to add battery storage in 2026. The Third Party Owner claims the 30% commercial Investment Tax Credit on the full installed system — solar panels, battery, and EV charger — and passes that value back to you through a lower prepaid price.

This means you get the battery installed, warranted, and maintained by Solar Tech with the full ITC benefit built into your upfront price. No tax paperwork, no income requirement, no waiting for a refund. Learn more about the Prepaid Solar PPA.

Add an EV Charger to Your Battery and Solar Project

A home battery system and an EV charger work together in a way that multiplies the value of both. Your solar panels charge the battery during the day. At night, the battery charges your electric vehicle at solar rates instead of peak grid rates. The result is a home energy system that powers both your house and your car from the sun.

Adding a Level 2 EV charger during a solar and battery project is the most cost-effective time to do it — the electrical work is already underway. Through the Prepaid PPA, the EV charger may also qualify for the 30% ITC value as part of the installed system. Learn more about EV charger installation.

Solar Battery Financing Options

Prepaid Solar PPA — Solar Tech One upfront payment covers solar, battery, and EV charger. The 30% commercial ITC value is built into the price. Solar Tech installs and maintains the system. Ownership transfers to you after year six. Learn more about the Prepaid Solar PPA.

Enfin PPA and Solar Lease — Axia by QCells No upfront cost options for homeowners who prefer $0 down. Monthly payments based on system production or a fixed lease rate. Learn more about financing options.

PACE financing Property-Assessed Clean Energy financing with terms up to 30 years. Covers battery storage combined with roofing and solar projects. Repaid through your property tax bill.

Traditional loans Finance your battery system with a loan and own it outright from day one. See all financing options.

Why Home Pro Roofing and Solar for Battery Storage

Nearly 20 years of local experienceHome Pro, formerly Butler Construction, has served homeowners in Sunnyvale, Palo Alto, Mountain View, San Jose, and across the Bay Area since 2006. We understand local permit requirements and PG&E interconnection processes for battery storage projects.

All four major battery brandsWe install Tesla Powerwall 3, Enphase IQ Battery 10C, FranklinWH aPower, and QCells Q.HOME CORE G3 — all US-manufactured, all backed by strong warranties, all appropriate for different home configurations. We recommend the right system for your specific setup rather than pushing one brand.

One contractor for roofing, solar, battery, and EV chargingAdding battery storage during a roofing or solar project saves a separate mobilization cost and eliminates the need to coordinate multiple contractors. Learn more about our roofing services. Learn more about solar installation.

Licensed, insured, and certifiedWe hold California Contractor License CSLB #1050229 and carry full general liability and workers' compensation insurance. Every battery installation is permitted and inspected through your local city building department.

5-star Google reviews from Bay Area homeownersHomeowners across Sunnyvale, Palo Alto, Mountain View, Cupertino, and San Jose have rated Home Pro 5 stars for consistent quality, clear communication, and on-time project completion. Read our verified reviews.

Service Areas — Santa Clara, San Mateo, and Alameda Counties

Santa Clara County Sunnyvale, Mountain View, Palo Alto, Los Altos, Los Altos Hills, Saratoga, Cupertino, Santa Clara, San Jose

San Mateo County Menlo Park, Redwood City, San Carlos, Belmont, San Mateo

Alameda County Fremont, Newark, Union City

Frequently Asked Questions

Do I need battery storage if I already have solar? Under California's NEM 3.0 rate structure, battery storage is strongly recommended for most Bay Area homeowners with solar. Without storage, excess solar energy is exported to the grid at low rates during the day. A battery captures that energy for use when electricity rates are highest, significantly improving your monthly savings.

Can I add a battery to my existing solar system? Yes. We can integrate Tesla Powerwall 3, Enphase IQ Battery, FranklinWH, or QCells Q.HOME CORE with most existing solar installations, regardless of who installed the original system.

Which battery is right for my home? It depends on your existing solar equipment, energy usage, and backup goals. Enphase IQ Battery pairs naturally with Enphase microinverter systems. FranklinWH works with almost any inverter type and offers the largest capacity per unit. Tesla Powerwall 3 includes an integrated solar inverter ideal for new installations. QCells Q.HOME CORE pairs well with Axia by QCells solar systems. We evaluate your setup and recommend the best fit.

Are these batteries US-manufactured? Yes. All four systems we install are now US-manufactured. Tesla Powerwall 3 is made in Nevada. Enphase IQ Battery 10C is made in Texas. FranklinWH aPower is manufactured in Santa Clara, California. QCells Q.HOME CORE G3 is made in Michigan. This is an important consideration in 2026 given tariff pressures on imported equipment.

Does battery storage qualify for any tax credits or incentives? For homeowners going solar through the Prepaid PPA with Solar Tech, battery storage qualifies as part of the full system under the 30% commercial ITC, with that value built into the prepaid price. The California Self-Generation Incentive Program (SGIP) may also offer rebates for battery storage in certain utility areas. Ask us about current incentive availability when you get your estimate.

When is the best time to add battery storage? The best time is when you are already doing roofing or solar work. Since the electrical system is already being worked on, adding storage at that point saves a separate mobilization cost. That said, battery storage can be added to most existing solar systems at any time.

Can I charge my EV from my battery? Yes. A home battery combined with an EV charger allows you to charge your vehicle overnight using stored solar energy instead of peak grid rates. This is one of the most cost-effective ways to reduce your total energy costs across both your home and your vehicle. Learn more about EV charger installation.

Related Services

• Solar Installation — Solar Tech and Axia by QCells
• EV Charger Installation
• Prepaid Solar PPA — Solar, Battery, and EV Charger for One Upfront Payment
• Solar Panel Removal and Reinstallation
• Roof Replacement
• All Financing Options
• Project Portfolio

Get a Free Battery Storage Estimate

Ready to add battery backup to your home? Whether you are pairing it with a new solar installation, adding it to an existing system, or including it as part of a roofing and solar project, Home Pro Roofing and Solar is ready to help. Contact us today for a free in-home estimate with no obligation and no pressure.

Call (800) 650-3134 — Available 7 days a week, appointments available same week.

Serving Sunnyvale, Mountain View, Los Altos, Palo Alto, Cupertino, Santa Clara, San Jose, Redwood City, San Carlos, Belmont, San Mateo, Menlo Park, Fremont, Newark, and Union City. Licensed California Contractor — CSLB #1050229.