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AfterFast, Reliable Solar Battery Storage & Backup Across Exeter
If your Exeter home lost power during January’s tule fog stretch, you already know the question isn’t whether to add battery storage. It’s which battery, sized for what, and installed by who. A properly sized solar battery in Exeter typically runs $12,500 to $19,800 before incentives, and it changes what your existing array actually does for you during the five foggiest weeks of the year. We serve Exeter directly from our Central Valley office, with Gus’s own crew doing the work, and a live person answers when you call (877) 550-6892.
Exeter’s combination of dense winter fog, triple-digit summer AC loads, and older ranch homes on 100-amp panels makes battery sizing here different from anywhere else in Tulare County. We know that before we ever climb on your roof.
Why Gus’s Solar Is Exeter’s Preferred Solar Battery Storage & Backup Company
We’ve worked on enough Exeter homes to know what’s behind the walls before we open them. Homes near Rocky Hill Elementary and along Belmont Street run the same pattern: 1940s to 1970s construction, original 100-amp service, low-pitch composition roofs, and a detached shed or citrus packing structure that was never meant to carry a backup circuit. Our Solar Battery Storage & Backup team sizes batteries around all of it, not just the square footage on your tax record.
Gus Petrakis founded this company in 2011, and he still puts his name on every job. That means something specific in Exeter, where people talk. If a battery install isn’t done right, you’ll see Gus at the hardware store, and so will your neighbor. The 90-Day Done Right Promise is in writing on every job: if it’s not right, one call brings him back. No ticket queue. No subcontracted crew. His own background-checked, uniformed techs do the work.
We quote real year-25 output numbers off your actual utility bill, not a brochure. Bring us a bill, we’ll bring you the math. And take two weeks. Think about it. The price will be the same.
Our Solar Battery Storage & Backup Services in Exeter
We install and service batteries for existing solar arrays and new builds across the 93221 zip code. Four services cover most of what Exeter homeowners call us for.
Tesla Powerwall Installation
A Tesla Powerwall in Exeter runs $13,200 to $17,400 installed before the federal tax credit, depending on whether you need one unit or two. For Exeter homes with whole-home backup ambitions, two Powerwalls handle the summer AC load far better than one. The valley heat is unforgiving, and a single Powerwall simply will not carry a central air system through a July outage.
Enphase IQ Battery Installation
Enphase IQ batteries are the most common request from Exeter customers with existing Enphase microinverter arrays, and for good reason. The system talks to itself. One IQ 5P runs $6,200 to $8,500 installed before incentives, and stacking three is common on larger Exeter properties with agricultural outbuildings. We sized an Enphase IQ Battery retrofit for a 1962 ranch on Belmont Street after the homeowner’s existing array showed a negative true-up statement in January’s fog. Our techs tied the battery into a separate 100-amp subpanel serving an old shed the family had used for citrus crate storage, replacing its undersized feed and adding a rapid shutdown switch to meet Tulare County inspection. With the battery set to discharge during our utility’s 4 to 9 p.m. peak window, the customer now avoids most of the winter bill shock.
Whole-Home Backup Power
Whole-home backup in Exeter means thinking past the house itself. If you have a detached garage, workshop, or packing shed with its own electrical feed, that structure needs to be on the backup circuit, or it goes dark when the grid drops. We routinely discover that a residential quote turns into a secondary-structure tie-in once we’re on site. Older citrus-era properties on parcels south of Highway 198 almost all have a separate structure with undersized service that the homeowner assumed was already solar-ready. It usually isn’t. We fix that.
Battery Retrofit for Existing Solar
If you installed solar before 2023, you’re on an older net metering arrangement, and adding a battery changes what your system is worth. Under NEM 3.0, the utility pays far less for your exported power during midday and charges far more during the 4 to 9 p.m. window. A retrofit battery shifts your stored production into that window. For Exeter homeowners, the math is straightforward: a $9,500 to $14,000 battery retrofit typically pays for itself in 7 to 11 years on a system that already exists, and it keeps your refrigerator and well pump running when the tule fog kills production for a week straight.
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 Exeter
We’re certified to install and service Tesla, Enphase, SolarEdge, SunPower, Panasonic, Qcells, REC, Canadian Solar, JinkoSolar, and FranklinWH. When an Exeter customer calls with a FranklinWH aGate that’s throwing a fault, or a Panasonic battery that won’t hold charge through a fog stretch, we can usually be there within one business day. We stock common parts locally so we’re not waiting on a freight shipment when your backup power is down. If your battery came from a company that no longer returns your calls, bring us the paperwork. We do free second opinions on any written estimate.
Common Solar Battery Storage & Backup Problems We See in Exeter Homes
These are the calls we take most often from Exeter homeowners, and they map directly to this city’s climate and housing stock.
- Fog-shortened winter days leave batteries partially charged. Exeter’s December and January fog can suppress daily solar production by more than 50% for days at a time. A battery sized for summer generation may not refill for three or four days straight, which means a backup that dies before the grid returns. We size winter-adjusted, or we tell you honestly what your backup window actually looks like.
- Detached sheds and packing structures fall off the backup circuit. Older ranch homes with 100-amp main panels often have a secondary detached structure wired separately. If that structure isn’t tied into the battery’s backup subpanel, it goes black when the house stays lit. We see this constantly in Exeter.
- Citrus cold-storage loads drain batteries every night during harvest season. A packing shed or walk-in cooler pulling 1.5 to 3 kW overnight will empty a single battery before morning. Summer production estimates look great on paper. The real-world draw during citrus harvest is a different story.
- Undersized 100-amp panels choke battery output. Many Exeter homes built between the 1940s and early 1980s still run 100-amp service. A modern battery install frequently requires a panel upgrade first, and that changes both the price and the timeline.
Pricing for Solar Battery Storage & Backup in Exeter, CA
Here’s what Exeter homeowners actually pay, as of this season. A single Enphase IQ 5P battery install runs $6,200 to $8,500 before the federal tax credit. One Tesla Powerwall runs $13,200 to $15,800. A two-battery system for whole-home backup lands between $18,000 and $26,000 depending on panel upgrades and whether we’re tying in a detached structure. Panel upgrades on older Exeter homes add $2,800 to $4,200 when they’re needed. The federal tax credit typically knocks 30% off the battery portion of the invoice. We quote off your actual bill, and the number we give you is the number you pay. Call (877) 550-6892 for a free estimate. We don’t ask for a signature tonight, and we never will.
We Also Serve Cities Near Exeter
Our crew covers Exeter and the surrounding Tulare County communities, including Farmersville, Lindsay, Woodlake, and Visalia. If you’re in one of those towns, the same owner-operated standard applies. One call, one crew, one name on the truck.
Serving Exeter, CA - Our Local Coverage Area
We’re based in the Exeter 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 Exeter
A single Enphase IQ 5P keeps a modest Exeter home’s essentials, refrigerator, lights, wifi, and a gas furnace blower, running for 12 to 18 hours on a full charge. If dense fog has kept your array from recharging it, that window shrinks. A week of tule fog with no grid means a dead battery by day two unless you have two or three units. We size for the fog, not for the brochure. Call (877) 550-6892 and bring us your January bill.
No. NEM 3.0 is exactly why battery storage matters more now. Under the old rules, your excess solar export earned near-retail value. Under NEM 3.0, exported power earns pennies, and grid power from 4 to 9 p.m. costs real money. A battery shifts your stored production into that peak window. In Exeter, where winter production drops hard, the battery is the only thing standing between you and a January bill that looks like it belongs to someone without solar.
Yes, but not by accident. The detached structure needs a properly sized feeder run to the backup subpanel, and in many Exeter homes, the existing feeder is undersized. We identify that on day one, not after the first outage. If the shed runs a cold-storage unit or irrigation pump, we’ll calculate the real load before we quote the battery size. That’s the difference between a backup system and a paperweight in January.
It depends entirely on the pump’s starting amperage and the battery’s surge rating. A 2 HP well pump pulls a hard start surge that a single IQ 5P can usually handle. A 5 HP irrigation pump may not. We’ll check the nameplate on your pump and tell you straight whether one battery does it or you need two. No guessing, and no promise we can’t keep.
Most lithium iron phosphate batteries carry a 10-year or 7,000-cycle warranty, whichever comes first. In Exeter’s heat, outdoor wall-mounted batteries age faster than garage-mounted units, and that’s a real factor. We service and expand existing systems, and when a replacement does make sense, we’ll tell you that before we sell you anything. The goal is a battery that works when the fog rolls in, not one that limps through a warranty period.
Call Gus’s Solar for Battery Storage in Exeter
If you live in Exeter and you’re tired of watching your solar array sit useless during a January outage, call us. Gus Petrakis started this company in 2011, and he still answers his own phone. His crew does the work, his name is on the truck, and his 90-Day Done Right Promise is in writing. Bring us a bill, we’ll bring you the math. Take two weeks. The price will be the same. Call (877) 550-6892 today, and you’ll talk to a real person who knows Exeter.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Exeter since 2011.