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 San Francisco
A solar battery in San Francisco isn’t a luxury add-on anymore. With NEM 3.0 export rates running roughly 75% below what they were under the old net metering rules, the only way most San Francisco homeowners make their solar actually pay is to store daytime production and use it at night. That’s where we come in. Gus’s Solar installs and services battery backup systems across San Francisco, from Visitacion Valley to the Outer Sunset. We know the permitting quirks, the fog zones, the flat roofs, and the 60-amp panels that complicate most jobs here. Call (877) 550-6892 for a straight answer.
Why Gus’s Solar Is San Francisco’s Preferred Solar Battery Storage & Backup Company
Our Solar Battery Storage & Backup work in San Francisco starts with something most out-of-town outfits skip: a fog-zone assessment. We’ve been doing battery retrofits and whole-home backup in San Francisco long enough to know that a system sized for a sunny Mission District rowhouse will underperform a mile west in the Inner Sunset. Gus Petrakis put his name on this company in 2011, and our San Francisco customers get his cell number, not a ticketing portal. When your battery throws a fault at 9pm, a live person answers. Every time.
Our San Francisco crew knows the Victorian and Edwardian housing stock that dominates this city. We’ve run conduit around ornate parapets in the historic districts. We’ve squeezed battery wall-mounts into basements with 6-foot ceilings. We’ve dealt with DBI’s planning review more times than we can count. That local knowledge means fewer surprises and fewer change orders. You get an honest quote, a published address, and a name you’ll see at the hardware store. We don’t subcontract. Gus’s own crew does the install, background-checked and uniformed, and every job carries the 90-Day Done Right Promise in writing. If it’s not right, Gus makes it right.
Our Solar Battery Storage & Backup Services in San Francisco
Tesla Powerwall Installation
The Powerwall 3 is the most common battery we install in San Francisco, and for good reason: it’s compact, it’s quiet, and it handles the city’s aggressive time-of-use rate structure well. For a typical San Francisco Victorian with a flat roof and limited wall space, we usually recommend a Powerwall 3 mounted in the garage or basement, away from street-facing walls that could trigger historic district planning review. The integrated inverter simplifies retrofits on older arrays too. A single Powerwall 3 installation in San Francisco typically runs $13,500-$16,500 before incentives.
Enphase IQ Battery Installation
Enphase IQ batteries are modular, which makes them a strong fit for San Francisco’s many small-footprint row houses. You can start with one 5P unit and expand later, which matters when your electrical room is the size of a closet. For homes with existing Enphase microinverters, the integration is clean: same app, same monitoring, no compatibility headaches. We recently retrofitted a 1920s Edwardian row house on Sanchez Street in Noe Valley with an Enphase IQ Battery after the homeowner saw their NEM 3.0 true-up statement spike. Our techs first had to run a rapid shutdown compliance check on the existing 2008 string inverter, then integrate the battery with the legacy array’s microinverters, all while keeping the conduit off the ornate street-facing parapet per SF Planning’s historic district review. The result is a whole-home backup that carries their foggy summer evenings without touching the grid. An Enphase IQ Battery installation in San Francisco generally runs $9,000-$14,000 depending on unit count.
Whole-Home Backup Power
Most San Francisco homeowners want more than a couple of circuits backed up. They want the refrigerator, the internet, the furnace, and maybe the EV charger covered when the next storm knocks out power or PG&E runs a public safety power shutoff. Whole-home backup in San Francisco usually means two to three batteries plus a smart load panel, and we size it against your actual bill, not a brochure estimate. For an average 1,800-square-foot San Francisco home, expect $26,000-$38,000 for a complete whole-home backup system with installation. We quote the year-25 output, not the day-one number.
Battery Retrofit for Existing Solar
This is the most common request we get in San Francisco right now: “I already have solar, but my NEM 3.0 bill is brutal. Can I add a battery?” Almost always, yes. The catch is that many San Francisco homes still have pre-2015 string inverters that lack the rapid shutdown capability required by the city’s amended fire code. That means a retrofit can involve an inverter upgrade, not just a battery bolted to the wall. We inspect everything before we quote, so there’s no surprise line item later. Typical battery retrofits in San Francisco run $11,000-$19,000 depending on inverter condition and panel capacity.
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 San Francisco
We work with the equipment that holds up in San Francisco’s salt air and fog: Tesla, Enphase, SolarEdge, Panasonic, FranklinWH, and others. We’re not married to one brand. We’re married to what works on your specific house and your specific utility rate schedule. Our shop keeps common battery parts and disconnects stocked locally, so a service call in San Francisco doesn’t wait on a truck from Sacramento. If your FranklinWH aGate or Enphase combiner throws a code, we can usually be there the same day.
Common Solar Battery Storage & Backup Problems We See in San Francisco Homes
- Battery capacity miscalculated for the home’s fog zone. Systems sized on city-average irradiance leave Outer Sunset customers short of kWh offset on overcast days. We model production by specific neighborhood, not by a statewide average.
- Inverter compatibility conflicts on retrofits. Pre-2015 string inverters without rapid shutdown capability will fail a San Francisco fire code inspection. We catch this before we quote, not after the permit is filed.
- Historic district planning review rejects wall-mount locations. Battery units placed on street-facing walls of Victorian homes are often denied, which delays interconnection and adds weeks. We plan for this from day one.
- 60-amp electrical services can’t handle the load. Many of San Francisco’s pre-1930s row houses still have original 60-amp panels. A battery install almost always triggers a panel upgrade to 200 amps, and we fold that cost into the quote upfront.
Pricing for Solar Battery Storage & Backup in San Francisco, CA
San Francisco pricing runs higher than the East Bay for one reason: the housing stock. Older panels, historic district reviews, flat roofs, and cramped electrical rooms all add labor. Here’s what we typically see in San Francisco:
- Single battery (Powerwall 3 or Enphase 5P): $13,500-$16,500 installed
- Two-battery whole-home backup: $24,000-$32,000 installed
- Battery retrofit with inverter upgrade: $15,000-$22,000 installed
- 200-amp panel upgrade (if needed): $3,800-$6,500
Every estimate is built off your actual PG&E bill and your actual production data. Bring me a bill, I’ll bring you the math. Call (877) 550-6892 for a free estimate. Take two weeks. Think about it. The price will be the same.
We Also Serve Cities Near San Francisco
In addition to our San Francisco work, Gus’s Solar serves the surrounding neighborhoods and communities: Mission District, Noe Valley, Chinatown, and Visitacion Valley. If you’re in San Francisco proper or any nearby area, call us at (877) 550-6892 and we’ll let you know when we can be there. We schedule locally, and we show up on time.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 San Francisco
Because San Francisco’s fog microclimates create a city-within-a-city solar landscape. The Mission and Potrero Hill often get 30% more annual sun hours than the Inner Sunset or Outer Richmond, just two miles away. If the battery is sized on a city-wide average, fog-belt homes come up short. Our proposals always start with a production estimate based on the specific fog zone, because that determines how many kWh of storage you actually need to offset night-time usage. Call (877) 550-6892 and we’ll model your actual address, not a generic San Francisco number.
Yes, but it requires extra planning. San Francisco’s Department of Building Inspection routes solar and battery permits through an additional planning review if the property sits within a historic or conservation district, which covers a substantial share of Victorian-belt neighborhoods in ZIP codes 94127, 94102, and 94103. Street-facing battery wall-mounts are often rejected, so we design for basement or garage placement with low-profile mounting. This adds weeks to the permit timeline, so plan ahead. Call (877) 550-6892 and we’ll check your address against the historic district maps before you spend a dime.
Yes, and in most cases it’s the only thing that will. Under NEM 3.0, PG&E credits exported solar at roughly a quarter of the old retail rate. A battery lets you store midday production and use it during the expensive evening peak, which is exactly when San Francisco’s foggiest months suppress live production. Most of our San Francisco customers see their true-up bill drop 60-80% after a properly sized battery retrofit. Call (877) 550-6892 for a free estimate based on your actual bill.
Almost always, yes. Many of San Francisco’s pre-1930s Edwardian and Victorian row houses still have original 60-amp panels. A battery backup system requires a 200-amp service in most cases, and the panel upgrade has to happen before the battery can be inspected and interconnected. We include that cost in the quote upfront, so there’s no surprise mid-project. Figure $3,800-$6,500 for the panel upgrade on a typical San Francisco rowhouse. Call (877) 550-6892 and we’ll look at your panel during the site visit.
For tight spaces, we usually recommend the Tesla Powerwall 3 or the Enphase IQ 5P. The Powerwall 3 has an integrated inverter, which saves wall space compared to systems with separate components. The Enphase 5P is modular, so you can stack multiple units in a small footprint. For homes needing a whole-home backup with limited floor space, FranklinWH’s aGate is another strong option. We’ll spec the right brand based on your electrical room dimensions, your fog-zone production, and your utility rate schedule. Call (877) 550-6892 for a straight recommendation.
Written by Gus Petrakis, Owner at Gus’s Solar, serving San Francisco with solar installation and repair since 2011.