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Fast, Reliable Solar Battery Storage & Backup Across Claremont
Solar battery storage in Claremont runs $9,500 to $18,500 for a typical residential install, and most homes we serve in the 91711 zip code pair a single 13.5 kWh battery with an existing solar array. We’re in Claremont weekly, and our crews know the tree-shaded streets, the older Craftsman bungalows near the Village, and the mid-century ranches that climb toward the foothills. When your power goes out during a summer heat wave or a PSPS event, you want a battery that’s sized right for your actual usage, not a brochure number. Call (877) 550-6892 and Gus’s Solar will give you the straight math on backup power for your Claremont home.
Why Gus’s Solar Is Claremont’s Preferred Solar Battery Storage & Backup Company
Gus Petrakis founded Gus’s Solar in 2011 and never handed the work off to a sub. His own crew does every install across Claremont, from the jacaranda-lined streets west of the Village to the foothill neighborhoods north of Base Line Road. That matters here more than most places, because Claremont’s battery jobs are never cookie-cutter. Our Solar Battery Storage & Backup team has retrofitted batteries onto systems we installed a decade ago and onto systems installed by companies that no longer answer the phone. We quote the year-25 output, not the day-one brochure number, and we tell every Claremont homeowner the same thing: take two weeks, think about it, the price will be the same.
We answer our own phone. A live person picks up 24/7, not a voicemail or a ticketing portal. When a Claremont customer calls at 9 p.m. because their battery threw an error code, they talk to someone who can actually help. Every job carries the 90-Day Done Right Promise in writing. If it’s not right, Gus comes back and makes it right. That’s the whole deal, and it’s why our Claremont customers keep our number saved.
Our Solar Battery Storage & Backup Services in Claremont
Tesla Powerwall Installation
A Tesla Powerwall 3 installation in Claremont typically runs $11,000 to $15,000 before incentives, including the gateway and necessary electrical work. On the north-side foothill streets near Claremont Wilderness Park, we regularly see homes where protected parkway oaks cut into roof production, and a Powerwall’s smart controls let the battery recharge during whatever sun the array does capture. We handle the full install, the interconnection paperwork, and the programming so it actually performs in this specific climate.

Enphase IQ Battery Installation
Enphase IQ batteries start around $9,500 to $12,000 for a 5 kWh unit in Claremont, and they’re a strong fit for the many homes here with partial-shade arrays and microinverter systems already on the roof. Because Claremont’s tree preservation ordinance keeps mature oaks and jacarandas standing, the per-panel optimization Enphase offers matters more here than in sunnier, treeless places. We size the battery to your real usage patterns, not a generic template.

Whole-Home Backup Power
Whole-home backup in Claremont means accounting for summer AC loads that push well past what a single battery can island. The math is simple: a 3-ton AC unit draws roughly 3,500 watts running, and your battery needs to start that compressor, not just run it. A two-battery setup for whole-home backup in Claremont runs $18,000 to $28,000 installed. We’ll show you exactly what circuits you can realistically back up, and we’ll be honest if a single battery should cover only your refrigerator, lights, and a few outlets.

Battery Retrofit for Existing Solar
Most of the battery work we do in Claremont is retrofitting homes that already have solar. Systems installed before 2020 were nearly always sized without storage in mind, and the NEM 3.0 rules changed the math entirely. A battery retrofit in Claremont runs $10,000 to $16,000 depending on your existing inverter and panel setup. On one north-side foothill street near the Wilderness Park, our crew retrofitted a Tesla Powerwall 3 onto a 2018 system for a mid-century ranch where protected parkway oaks had degraded the east-facing array production by 18%. We configured the battery for self-consumption mode using NEM 3.0 time-of-use arbitrage, and that homeowner now runs AC through peak-rate evenings without drawing from SCE’s grid. That’s the kind of fix that only comes from knowing the local conditions.

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 Claremont
We install and service batteries from Tesla, Enphase, and FranklinWH, and we keep common parts stocked for fast turnaround on Claremont service calls. If your Enphase battery throws a fault mid-summer, we don’t want you waiting two weeks on a warehouse shipment. Our techs are background-checked and uniformed, and they’re the same crew that installed the system, not a rotating cast of subcontractors. We work with the equipment that actually holds up in Claremont’s heat, because a battery that underperforms at 105°F is a battery we won’t put on your wall.
Common Solar Battery Storage & Backup Problems We See in Claremont Homes
- Undersized 100-amp panels on pre-WWII Craftsman bungalows: Many homes near the Village and the historic districts still run 100-amp electrical services, which overload when a whole-home backup battery tries to island during a summer outage with AC running. We’ll tell you upfront if a panel upgrade to 200 amps is required before the battery can be interconnected, and we won’t bury that cost in the fine print.
- Protected canopy shade degrading battery recharge rates: Claremont’s tree preservation ordinance keeps mature oaks and jacarandas standing, which means a battery that recharges fully by 2 p.m. on a treeless lot in Pomona might not hit full charge until 5 p.m. on a shaded Claremont street. That changes battery sizing, and we design around it.
- Rapid shutdown compliance on steep, tree-shaded roof planes: The steeper rooflines on north-side foothill homes and the partial shading from protected street trees complicate inverter and battery placement, sometimes forcing longer DC runs that reduce overall system efficiency. We plan routing and conduit placement before we start, so you’re not surprised by an extra day of labor.
- Evening battery drain when HVAC and pool pumps kick on after sunset: Claremont’s summer heat means AC runs well past sundown, and homes near the Village’s jacaranda streets with pool pumps on timers often drain a battery faster than the homeowner expected. We program time-of-use settings around your actual household schedule, not a default profile, so you don’t hit empty during a PSPS event.
Pricing for Solar Battery Storage & Backup in Claremont, CA
A single-battery install in Claremont runs $9,500 to $15,000. A two-battery whole-home setup runs $18,000 to $28,000. Battery retrofit onto an existing solar system runs $10,000 to $16,000, depending on whether your inverter needs replacement or your panel needs an upgrade. What moves the number: your panel’s amperage, the distance from your meter to the battery location, whether your existing inverter is battery-compatible, and how many circuits you want backed up. We quote off your actual utility bill and your actual usage history, not a regional average. Bring me a bill, and I’ll bring you the math. Estimates are free, and there’s no trip charge inside our own county. Call (877) 550-6892 and we’ll come out to your Claremont home, walk the roof and the panel, and hand you a number that won’t change when the install happens.
We Also Serve Cities Near Claremont
Gus’s Solar serves Claremont and the surrounding communities, including Montclair, La Verne, Upland, and Pomona. If your home sits on the border of 91711 or your street straddles two city lines, call us and we’ll sort it out. Scheduling and dispatch are coordinated from our Los Angeles office, and crews serve Claremont locally.
Serving Claremont, CA - Our Local Coverage Area
We’re based in the Claremont 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 Claremont
Claremont’s city-enforced mature tree canopy, the oaks and jacarandas protected by local ordinance, directly reduces how much sun your array captures, which means a battery that would recharge by early afternoon on an open lot may not hit full charge until late afternoon on a shaded street. That shortens the window your battery can draw from before evening peak rates begin, which changes both battery sizing and time-of-use programming. We design around partial shade rather than pretending it’s not there. Call (877) 550-6892 and we’ll model your actual shade profile before we quote anything.
Yes, most 1950s mid-century ranches in Claremont still run 100-amp panels, and a battery with whole-home backup capability requires a 200-amp service to safely island during an outage. Panel upgrades add roughly $2,500 to $4,500 to the total job, and we’ll confirm whether yours actually needs it during the free estimate, not after you’ve signed. If your panel is already 200 amps, you skip that cost entirely.
A properly programmed battery reduces your SCE true-up charges by storing daytime production and discharging it during peak-rate evening hours, when Claremont’s summer AC load is at its highest and grid rates jump. Homes at the foot of the San Gabriel Mountains regularly hit 100°F and above in summer, which means your AC runs hard after the sun goes down, and a battery shifts that load off the grid. The savings depend on your rate plan and your usage, and we’ll show you the math off your own bill before you commit.
We install Tesla Powerwall, Enphase IQ batteries, and FranklinWH systems, and we service all three across Claremont, including the foothill neighborhoods north of Base Line Road. The right brand for your home depends on your existing solar equipment, your panel type, and whether you need whole-home backup or just critical loads. We’re brand-neutral and we’ll tell you which one fits your house, not which one we have on the truck.
Yes, you can retrofit a battery onto a pre-NEM 3.0 system, and if your system was installed before April 2023 you’ll keep your original, more favorable net metering terms on the grandfathered schedule, which makes adding storage even more valuable. Your existing inverter may need replacement to be battery-compatible, and we’ll tell you that cost upfront. A retrofit on a Claremont home with existing solar typically runs $10,000 to $16,000 depending on the inverter and panel work involved.
Call Gus’s Solar for Solar Battery Storage & Backup in Claremont
If you’re tired of losing power during heat waves, tired of true-up surprise bills, or just want to know what a battery would actually cost for your specific Claremont home, call (877) 550-6892. A live person answers, not a voicemail. We’ll schedule a free estimate, walk your roof and panel, and hand you a number anchored to your real utility bill. Take two weeks. Think about it. The price will be the same. If a salesman needs an answer tonight, the answer is no. Gus Petrakis puts his name on the work, and it’s been that way since 2011.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Claremont since 2011.






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