Free bill analysis - bring a power bill, get the production math for your actual roof, panel brands like Qcells and REC compared side by side
If the pitch starts at your door and ends with "sign tonight for the special," sleep on it. The sun will still be there tomorrow; so will we.
Before
After
Before
After
Before
AfterFast, Reliable Solar Battery Storage & Backup Across Sunnyvale
Adding a battery to your Sunnyvale home should not feel like a guessing game. We give you straight numbers off your actual PG&E bill, size the system for how Sunnyvale actually works, and put it in with Gus’s own crew. Gus Petrakis started this company in 2011 and he still answers the phone. Call (877) 550-6892 for a free estimate, and bring a bill. We’ll bring the math.
Sunnyvale sits in PG&E territory, not Santa Clara’s municipal Silicon Valley Power. That single fact changes everything about how a battery should be sized, programmed, and permitted here. We know the difference because we work in both. We do not copy a playbook from one city and hope it works in the other.
Why Gus’s Solar Is Sunnyvale’s Preferred Solar Battery Storage & Backup Company
Sunnyvale homeowners call us for the same reason they call a neighbor who has been here a while. We show up when we say we will, the price we quote is the price on the invoice, and the name on the truck is the name who comes back if anything needs attention. Our Solar Battery Storage & Backup team has worked across every ZIP in Sunnyvale, from the 1960s ranch tracts in 94087 to the newer townhome builds along Lawrence Expressway in 94085.
A live person answers our phone 24/7. Not a voicemail, not a portal, not a call center in another state. When a Sunnyvale battery system flags an error at 9 p.m., you call and a person picks up. That is the whole point of backup power. If the backup company is not reachable, the backup is not real.
We carry a 90-Day Done Right Promise in writing on every job. If something is not right, Gus makes it right. That promise is not vague marketing. It means one call brings him back to your Sunnyvale home, no runaround.
Our Solar Battery Storage & Backup Services in Sunnyvale
Tesla Powerwall Installation
A Tesla Powerwall 3 with a 200-amp panel upgrade is the most common pairing we install in Sunnyvale’s 94086 and 94087 ranch homes. These houses were built when a 100-amp panel ran lights, a fridge, and a window AC. Now they carry Level 2 EV chargers, mini-splits, and home-office equipment. The Powerwall handles Sunnyvale’s 90-95°F summer afternoons well, but only if the panel and gateway are sized for the real load, not the brochure load.
Enphase IQ Battery Installation
For Sunnyvale homes with existing Enphase microinverters, the IQ Battery 5P is often the cleanest fit. The system talks to itself natively, which matters in Sunnyvale where PG&E’s time-of-use peak from 4-9 p.m. hits exactly when the AC is working hardest. A properly programmed Enphase battery discharges through that window and recharges from midday solar. Done right, it can take a Sunnyvale true-up from thousands of dollars down to beer money.
Whole-Home Backup Power
Sunnyvale has a lot of half-acre lots with detached workshops, heavy garage doors, and equipment that needs to run regardless of PG&E’s mood. Whole-home backup is not just the house. We design around the workshop circuit, the well pump if there is one, the EV chargers, and the attic fan that keeps a 1960s ranch from hitting 100°F upstairs. That means a heavier inverter rating and a battery stack that does not fall over the first time the shop compressor kicks on.
Battery Retrofit for Existing Solar
Most Sunnyvale homes with solar already have it because the previous owner or the current one got burned by NEM 2.0 going away. Retrofitting a battery onto an existing array in Sunnyvale means reading the year-25 production estimate, not the day-one number. We pull your actual PG&E usage, your actual inverter make, and your actual panel amp draw before we quote a single dollar. Gus says it plainly: bring a bill, we’ll bring the math. Then take two weeks. The price will be the same.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Sunnyvale
We work with the equipment Sunnyvale homeowners actually have on their roofs and in their garages: Tesla, Enphase, and FranklinWH are the ones we see most in this market. We keep local stock for common Sunnyvale replacements so a failed battery inverter in 94087 does not mean waiting a week for a part from a warehouse in Texas. If you have existing Qcells, REC, or SunPower panels, we can usually retrofit without touching the array. If a salesman needs an answer tonight, the answer is no. Ours will still be the same tomorrow.
Common Solar Battery Storage & Backup Problems We See in Sunnyvale Homes
- Contractors copying Santa Clara’s interconnection checklist. Sunnyvale addresses in 94085, 94086, 94087, and 94088 fall under PG&E’s distributed-energy queue, which runs on different timelines and paperwork than Santa Clara’s municipal process. A contractor who does not know the difference adds two months to your project without telling you.
- Batteries sized for the nominal AC load, not Sunnyvale’s real afternoon heat. With 260+ clear days and summer afternoons at 90-95°F, a 1950s ranch’s attic heat pushes demand past what a barely-adequate inverter can sustain. The result is a nuisance rapid shutdown exactly when you need the battery most.
- HOA-governed townhomes in 94085 with shared-roof fire-code setbacks. The battery contract gets signed, then the permit stalls because the installer did not check the HOA’s clearances for exterior wall-mount units. Ours checks before we quote.
- 100-amp panels already running at 80% sustained load. In 94087 especially, tech workers added Level 2 EV chargers, mini-splits, and server racks to 1960s and 1970s ranch homes. By the time a battery enters the conversation, the panel is often maxed out and a 200-amp replacement is a required line item, not an upsell.
Pricing for Solar Battery Storage & Backup in Sunnyvale, CA
We believe in telling Sunnyvale homeowners the number before we ask for a signature. A single Tesla Powerwall 3 with gateway and installation in Sunnyvale typically runs $14,000 to $18,000 before incentives. An Enphase IQ Battery 5P with system controller runs $9,000 to $13,000. A 200-amp panel replacement, which we include as a real line item rather than a surprise at permit time, adds $3,500 to $5,500. A full whole-home backup stack with two Powerwall 3 units and the panel work lands between $28,000 and $36,000. Those are Sunnyvale market numbers, not out-of-state brochures.
What changes the price most in this city: the age of your panel, whether your array is Enphase or SolarEdge, and whether your HOA in 94085 requires a specific wall-mount location. We quote off your actual PG&E bill, not a guess. Call (877) 550-6892 for a free estimate. Take two weeks to think about it. The price will be the same.
We Also Serve Cities Near Sunnyvale
In addition to our full Solar Battery Storage & Backup in Sunnyvale coverage, our crews run regular routes through Mountain View, Santa Clara, Cupertino, and Los Altos. If you are one town over and need a real number for a battery on an existing system, call us. Same crew, same promise, same phone number.
Serving Sunnyvale, CA - Our Local Coverage Area
We’re based in the Sunnyvale area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Solar Battery Storage & Backup in Sunnyvale
Probably, and we will tell you that before you sign anything. Most 1960s and 1970s ranch homes in 94086 and 94087 have 100-amp panels that were already near capacity before the first EV charger was plugged in. We check the sustained load during the estimate, and if a 200-amp replacement is required, it appears as a line item in the first quote. Not a surprise at permit time. Call (877) 550-6892 and we will check yours.
PG&E’s NEM 3.0 rates cut solar export compensation by roughly 75% compared to the old rules, which means a Sunnyvale array without a battery exports power at a loss and buys it back at peak rates. Santa Clara’s municipal utility runs a different export structure entirely, and a payback calculation built for a Santa Clara address does not work one street over in 94087. We rebuild the math for each Sunnyvale home from the actual bill. That is the only honest way to do it.
Yes, but the inverter and battery stack must be sized for the workshop circuit, not just the house. We see a lot of Sunnyvale half-acre lots where a compressor, table saw, or heavy garage-door opener draws a spike that a barely adequate battery system cannot ride through. We design for the spike, and if you need whole-home plus workshop, we say so in the quote. Bring us the bill and the workshop’s draw. We’ll bring the math.
It will, and the timeline is different in Sunnyvale’s 94085-94089 addresses than it is next door in Santa Clara. A battery addition triggers a PG&E distributed-energy review that a contractor unfamiliar with Sunnyvale’s specific queue can misjudge by weeks or months. We file Sunnyvale paperwork for Sunnyvale addresses, and we tell you the expected wait before the first screw turns. If the estimate says six weeks, plan on six weeks.
We pull your actual PG&E usage history, not the production number from the original sales brochure. A 2016 array in 94087 that was sold as “100% offset” is often running at 70-80% of that promise because the previous installer used the day-one number. Gus quotes the year-25 output, not the day-one brochure number. When we add a battery, we size it against what your panels actually produce now, not what a salesperson promised a decade ago.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Sunnyvale since 2011.
Call (877) 550-6892 for a free estimate. A live person answers, 24/7, and the quote is built off your actual bill. No signature tonight, no pressure, no fine print. Take two weeks. We’ll still be here.