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AfterFast, Reliable Solar Battery Storage & Backup Across San Rafael
Solar battery storage in San Rafael typically costs between $8,500 and $16,500 fully installed, depending on whether you’re adding a single Tesla Powerwall 3 or a larger Enphase IQ Battery bank. Most San Rafael homeowners we work with are looking at batteries for one of three reasons: NEM 3.0 export rates that make it smarter to store daytime solar than send it to the grid, MCE time-of-use windows that peak in the evening when the sun’s gone, or backup power for the winter storm season when PG&E outages hit Marin’s older circuits. We’ve been installing and servicing batteries in San Rafael since before most people knew what a home battery was. Call (877) 550-6892 and we’ll walk you through what actually makes sense for your house, your roof, and your bill.
Here’s the thing about San Rafael specifically: MCE supplies your energy, PG&E owns the poles and wires, and your battery has to answer to both. Most solar companies quoting batteries in Marin don’t model that split correctly. We do. That’s why our proposals here look different than what a generic installer from out of county will hand you.
Why Gus’s Solar Is San Rafael’s Preferred Solar Battery Storage & Backup Company
Gus Petrakis has been running this shop since 2011, and he still answers his own phone. When you call about a battery for your San Rafael home, you’re talking to the guy whose name is on the invoice, not a call center three states away. That matters when you’re trying to figure out whether your 1960s Terra Linda panel can handle a Powerwall without a service upgrade, or whether MCE’s NetGreen export rate actually changes your payback math. Gus has sat at enough San Rafael kitchen tables to know the difference between a Gerstle Park bungalow’s wiring and a Dominican hillside home’s shading profile.
We’ve built our reputation in San Rafael the slow way: showing up on time, quoting a price that holds, and fixing things when they’re not right. The 90-Day Done Right Promise is in writing on every job. If something’s off, one call brings Gus back. No ticket queues, no “your case has been escalated.” A live person answers 24/7, and our crew wears uniforms with the company name on them. You know who’s walking up your driveway before they knock.
San Rafael homeowners call us because we quote the year-25 output, not the day-one brochure number. Bring us your MCE bill and your PG&E bill, and we’ll build the math off your actual usage and current export rates. No pressure, no signature wanted tonight. Take two weeks. Think about it. The price will be the same.
Our Solar Battery Storage & Backup Services in San Rafael
Tesla Powerwall Installation
The Tesla Powerwall 3 is the most common battery we install in San Rafael, and for good reason. It’s a 13.5 kWh unit with an integrated inverter that handles the quick MCE time-of-use windows well. In San Rafael, a single Powerwall 3 typically runs $13,000 to $16,000 installed when you’re also putting it on a new system, or $11,000 to $14,000 as a standalone add. Homes in Terra Linda’s flat 1950s ranch tracts usually get the cleanest installs: simple 200-amp panels, accessible garages, and short conduit runs. Hillside homes in Sun Valley or above Dominican University often need longer wire pulls and wall-mount considerations that add a few hundred dollars to the bottom line.
Enphase IQ Battery Installation
If you already have Enphase microinverters on your roof, an Enphase IQ Battery makes a lot of sense. The system talks to itself, and the commissioning is cleaner when everything’s on the same platform. In San Rafael, we commonly install IQ Battery 5P units in pairs or triples, with 5 kWh of capacity per unit. A two-battery stack with gateway typically lands between $12,000 and $15,000 installed. The modular design works well for San Rafael’s smaller electrical rooms and tight garage walls, especially in the 1920s and 30s bungalows near Gerstle Park where floor space is at a premium.
Whole-Home Backup Power
Whole-home backup means your battery covers everything on your panel, not just a few critical circuits. In San Rafael, that usually means pairing two Powerwall 3s or three Enphase 5Ps with a smart load management system. Typical cost for whole-home backup in San Rafael is $18,000 to $28,000, depending on panel size and whether we need a backup switch or subpanel relocation. If you live in a Terra Linda ranch with a 1960s 100-amp panel, plan on a panel upgrade as part of the job. We’ll tell you that upfront, not after the inspection fails.
Battery Retrofit for Existing Solar
Most of the battery work we do in San Rafael is retrofit: the homeowner put solar up years ago under NEM 2.0, and now they want storage. A retrofit in San Rafael typically runs $10,000 to $17,000, depending on battery size and whether your existing inverter needs replacing. One thing we see constantly in San Rafael’s older stock: 1950s and 60s ranches with full 100-amp service panels that have no open breaker slots. That’s not a dealbreaker, but it does mean adding a backup switch or a subpanel, which adds $800 to $1,500 to the job. We’ll catch that before you sign anything.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in San Rafael
We work with Tesla, Enphase, FranklinWH, and SolarEdge batteries pretty much daily. Tesla and Enphase dominate the San Rafael market right now, but FranklinWH’s aPower unit is gaining ground with homeowners who want a battery that’s less tied to a single app ecosystem. We keep common parts and firmware tools stocked for all three, so San Rafael service calls don’t wait on a shipment from Southern California. Our Solar Battery Storage & Backup team handles everything from initial sizing to post-install monitoring and warranty service.
Common Solar Battery Storage & Backup Problems We See in San Rafael Homes
- Legacy main panels that fail interconnection. Homes in Terra Linda and around downtown San Rafael were built in the 1950s and 60s with 100-amp panels that lack a dedicated busbar slot for battery breakers. PG&E’s interconnection process rejects the application, and the homeowner is left scrambling. We catch this in the site survey and factor a panel upgrade or backup switch into the quote from day one.
- Ridge shading that drains batteries at the wrong time. Hillside lots on the Dominican slopes and in Sun Valley lose late-afternoon generation to ridgeline shade just when MCE’s evening peak rates kick in. If your battery isn’t sized for that shading profile, you’ll drain it before the true-up window closes. We do on-site horizon profiling for every San Rafael hillside quote because aerial tools undercount this constantly.
- Older bungalow wiring that can’t meet rapid shutdown. The 1920s and 30s Craftsman homes in Gerstle Park sometimes still have original ungrounded or partially knob-and-tube wiring. Battery grid-isolation and rapid shutdown requirements won’t clear inspection without a panel and wiring upgrade. We’ll tell you honestly if your house is one of those.
- MCE billing confusion after install. We regularly get calls from San Rafael homeowners who had a battery installed by an out-of-county company that modeled their savings on PG&E’s retail tariffs. Their actual MCE bill looks nothing like the proposal. Your battery’s value in San Rafael depends on MCE’s NetGreen export and time-of-use rates, not PG&E’s. If your installer didn’t account for that, your payback math is wrong.
Pricing for Solar Battery Storage & Backup in San Rafael, CA
Let’s put real numbers on the table. A single Tesla Powerwall 3 in San Rafael runs $11,000 to $14,000 installed as a retrofit, or $13,000 to $16,000 with a new solar system. Enphase IQ Battery 5P stacks run $6,500 to $8,500 per unit, with most San Rafael homes needing two to three units for meaningful backup. Whole-home backup for a typical San Rafael home lands between $18,000 and $28,000. What moves the number? Panel age, whether you need a backup switch, conduit run length on hillside properties, and whether your existing inverter is compatible. Those are the real variables, and we’ll show you all of them before you commit. Call (877) 550-6892 for a free estimate built off your actual MCE bill, not a brochure.
We Also Serve Cities Near San Rafael
We work across Marin County, so if you’re in San Anselmo, Fairfax, Lucas Valley-Marinwood, or Kentfield, the same crew and the same pricing approach apply. San Rafael is our core service area for battery work, and we can usually be at your house within a day or two of your call. Ask about our no trip charge within the county.
Serving San Rafael, CA - Our Local Coverage Area
We’re based in the San Rafael 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 Rafael
Yes, and this is the single biggest thing most installers get wrong in San Rafael. MCE’s NetGreen export credit is set by Marin Clean Energy, not PG&E, and it’s applied against MCE supply charges rather than PG&E delivery charges. That means the value of every kWh your battery exports during peak windows is different here than it would be in Santa Rosa or Petaluma. Our battery proposals for San Rafael are modeled specifically against MCE’s current NetGreen export rate and their time-of-use windows, so your payback math reflects what you’ll actually see on your bill. Call (877) 550-6892 and we’ll run your numbers against MCE’s current tariff.
In most cases, yes. A Powerwall 3 can be installed with a backup switch or a dedicated subpanel that doesn’t require full replacement of your existing main panel. That approach typically adds $800 to $1,500 to the job, versus $2,500 to $4,500 for a full 200-amp panel upgrade. We installed exactly this configuration on a 1964 Terra Linda ranch last spring, and the backup switch plus battery landed cleanly without touching the original panel beyond the necessary interconnection. The right call depends on your panel’s condition and available capacity. We’ll tell you which path makes sense after a site visit, and we’ll put it in writing before you commit.
Because shading hits solar production in the late afternoon, which is exactly when MCE’s evening peak rates climb. A hillside home in Sun Valley that loses generation at 4pm is paying more for grid power during the same hours its panels have gone dark. A flat Terra Linda ranch with full afternoon sun is still generating during those peak windows, so it relies less on stored energy. The battery’s job is to cover the gap between when your panels stop producing and when the peak window closes. That gap is bigger on shaded hillside lots, so the battery earns its keep faster there. We size batteries for San Rafael homes based on actual shading profiles from on-site measurements, not satellite imagery.
You can usually keep your existing panels and add batteries, but whether you need a new inverter depends on what you have. If your system uses Enphase microinverters, adding an Enphase IQ Battery is straightforward and doesn’t require replacing the microinverters. If you have an older string inverter, you’ll likely need to replace it with a hybrid inverter or pair the battery with its own integrated inverter, like the Powerwall 3. In San Rafael, most retrofit battery jobs keep the existing panels and microinverters. We’ll assess your exact setup during the site visit and tell you what’s required before you spend a dollar.
For most San Rafael homes, a battery pays for itself in 7 to 11 years when you factor in MCE’s NetGreen export credits, avoided peak-rate purchases, and any outage backup value. That’s longer than solar alone, which is why we tell homeowners to be honest about why they’re buying: if it’s pure economics, a smaller battery or none at all might be the right call. If you want backup power for the two or three outages San Rafael sees each winter, that’s a different calculation. We run the full math both ways and let you decide. Bring us a bill, we’ll bring you the numbers. Call (877) 550-6892 and we’ll schedule a free estimate.
Call Gus’s Solar for Solar Battery Storage & Backup in San Rafael
If you’re tired of solar companies that quote one number on the phone and another at the door, call us. Gus Petrakis runs this business from a published address with a license number you can verify, and his name is on every job we do. No pressure, no signature tonight. We’ll look at your MCE bill, your roof, and your panel, and tell you straight what a battery will cost and what it will actually save you. Then take two weeks and think about it. The price will be the same. Call (877) 550-6892 for a free estimate, or mention our Senior and Veteran 10% discount when you call. We serve all of San Rafael: 94901, 94903, 94912, and 94913.
Written by Gus Petrakis, Owner at Gus’s Solar, serving San Rafael and Marin County since 2011.