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AfterFast, Reliable Solar Battery Storage & Backup Across Joshua
Solar battery storage in Joshua, TX keeps your lights on when Oncor’s grid goes down, whether from hail-season storms, summer load-shedding, or the kind of winter event that froze ERCOT solid in 2021. A properly sized battery system for a typical Johnson County home runs $12,500-$18,500 installed, with whole-home backup setups landing between $22,000 and $35,000 depending on your panel count and whether we’re retrofitting onto existing solar. Gus’s Solar is owned and operated by Gus Petrakis, who puts his name on the truck and answers his own phone at (877) 550-6892. We’ve been doing this since 2011, and a live person picks up 24/7.
Why Gus’s Solar Is Joshua’s Preferred Solar Battery Storage & Backup Company
We’re not a door-knocking crew from out of state. We’re a Texas shop with a published address, a license number, and an owner who will be at the hardware store in Joshua the same week you see him on your roof. Our Solar Battery Storage & Backup team works directly with Oncor’s interconnection process here, which matters more than most homeowners realize. Oncor reviews every battery interconnection application on their own timeline, and their inverter approval list is specific. We build that into your schedule from day one, so you’re not staring at a finished wall with no export permission two months after install.
Joshua sits in Johnson County where half-acre and multi-acre lots are common, and that changes how we approach backup power. A ground-mounted array on the back two acres needs a different battery wiring strategy than a 2018 tract home roof off FM 917. We know both. The 90-Day Done Right Promise covers every job in writing. If something’s not right, one call brings Gus back. No ticket. No runaround.
Our Solar Battery Storage & Backup Services in Joshua
Tesla Powerwall Installation
A single Tesla Powerwall 3 in Joshua typically runs $13,000-$16,500 installed before any applicable credits. Two Powerwalls cover a 2,400-square-foot home with central AC for most outages. We see a lot of Joshua homeowners sizing for the well pump first, and we’ll sit down with your actual Oncor usage data to build the math off your real bill, not a brochure estimate. Bring me a bill, I’ll bring you the math.
Enphase IQ Battery Installation
The Enphase IQ Battery 5P runs $9,500-$12,000 installed in the Joshua area when paired with existing microinverters. It’s a smart retrofit choice for homes with older rooftop systems that still have good daylight output but no storage. We stock Enphase equipment locally for Joshua calls, which means faster turnaround when you need a controller replaced after a hail season.
Whole-Home Backup Power
Whole-home backup for a Joshua house means the battery islands every circuit: HVAC, well pump, refrigerator, freezer, septic pumps if you’re on acreage outside the city core. Full-home systems run $22,000-$35,000. The cost driver is almost always the main panel work and any service upgrade on 1970s-1980s ranch homes that are still running original 100-amp service. We’ll tell you honestly if a critical-loads panel makes more sense than trying to back up everything.
Battery Retrofit for Existing Solar
This is the service we do most in Joshua. Homeowners who installed solar between 2004 and 2016 didn’t have storage options worth buying. Now they do, but the retrofit isn’t always plug-and-play. Older inverters, corroded DC disconnects on ground-mount runs, and outdated rapid-shutdown circuits all need evaluation before we wire in a FranklinWH aPower or Enphase 5P. Retrofit pricing in Joshua runs $8,500-$14,000 depending on inverter replacement needs.
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 Joshua
We install and service Enphase, Tesla, FranklinWH, and Panasonic battery systems, plus the solar hardware those batteries talk to: SolarEdge, SunPower, Qcells, and Canadian Solar. For Joshua customers with existing arrays, we keep common replacement parts and battery controllers in our DFW stock so a field call doesn’t become a two-week parts wait. If you already own an array and the inverter failed after last spring’s hail, we can assess whether your panels are still producing and whether a battery retrofit pencils out before you spend another dollar on solar equipment.
Common Solar Battery Storage & Backup Problems We See in Joshua Homes
- Hail-damaged arrays feeding a battery that can’t fill. North Texas sits in Hail Alley. Cracked panel glass and stressed microinverters reduce DC input so the battery can’t recharge to full capacity, and the homeowner only discovers it during an outage. We test the array before selling storage.
- Long ground-mount AC runs with undersized wiring. On multi-acre Joshua lots, the array sits 100 feet or more from the house. Voltage drop confuses the battery charge controller and the system underperforms. We check wire gauge and disconnect condition on every ground-mount service call.
- Old net-metering assumptions after battery addition. Some homeowners on 1970s-1980s ranch properties think their original net-metering agreement still covers battery export. Oncor’s rules changed, and adding a battery without a new interconnection application can quietly kill your export credit. We file the paperwork before we mount the battery.
- 100-amp service panels that can’t carry backup loads. A whole-home battery on a 1980s ranch with original service needs a panel upgrade or a critical-loads panel. We’ll show you the real cost of both, no pressure to spend more tonight. Take two weeks. Think about it. The price will be the same.
Pricing for Solar Battery Storage & Backup in Joshua, TX
Straight numbers for the Joshua market: a single-battery retrofit runs $8,500-$14,000. A single new battery with inverter replacement lands $12,500-$16,500. Whole-home backup with two batteries runs $22,000-$35,000. The spread depends on your existing inverter, panel age, service amperage, and whether Oncor requires a line-side tap or permits an easy backfeed breaker. We give you a written number and we honor it. No signature wanted tonight. No trip charge for Joshua customers in Johnson County, and every estimate includes the Oncor interconnection filing timeline so you know the real completion date before we start.
One thing that makes Joshua different from our work in Burleson, Keene, or Crowley: Oncor’s review buffer. We build 2-4 weeks of utility review time into every Joshua backup project schedule because Oncor’s inverter approval list and interconnection queue are specific to this service territory. A shop that doesn’t work here regularly will quote you a finish date that ignores this. We won’t.
We Also Serve Cities Near Joshua
Gus’s Solar handles battery backup across the Johnson County corridor. We regularly serve Joshua, plus Keene, Burleson, Crowley, and Cleburne. If you’re on acreage north of Joshua near the Burleson line or east toward Keene, the same crew and the same 90-Day Done Right Promise apply.
Serving Joshua, TX - Our Local Coverage Area
We’re based in the Joshua 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 Joshua
Oncor’s review adds roughly 2-4 weeks to any Joshua battery install that involves export or backup interconnection, because applications go through Oncor’s inverter approval list and queue, not a municipal utility’s faster process. We file the application before we mount any hardware, and we build that buffer into your install date so you don’t end up with a finished system waiting on paper. Call (877) 550-6892 and we’ll walk you through your exact timeline.
Most 2004-2016 Joshua arrays need either a new inverter or an inverter compatibility check before a battery can be added, especially if the original unit is a SolarEdge that’s been through North Texas hail seasons. We recently retrofitted an Enphase IQ Battery onto a 2004 roof-mounted array off FM 917 in Joshua where an older SolarEdge inverter had failed after a hail strike. Our techs re-pulled the rapid-shutdown circuit and set the battery to island the home’s well pump and refrigerator. After Oncor’s interconnection sign-off, the owner watched that system carry them through a 6-hour outage last spring.
On a long, narrow Joshua lot where the only full-sun ground space sits 100 feet or more from the house, trenching and heavier-gauge wire adds $1,800-$3,500 to a battery project, and yes, it usually still beats a shaded rooftop array. The payback math changes if the trench crosses a driveway, septic field, or old ranch fencing. We’ll measure the actual wire run and give you the year-25 output number, not the day-one brochure figure.
Most Johnson County homeowners policies cover hail damage to rooftop panels and wall-mounted batteries under the dwelling or other-structures coverage, but the deductible and the fine print on “solar equipment” endorsements vary by carrier. We document hail ratings on every panel we install in Joshua because carriers ask for that paperwork after a claim. Get your policy reviewed before storm season and keep our number handy for after the storm.
On a 1980s Joshua ranch with original 100-amp service, whole-home backup usually requires either a service upgrade to 200 amps or a critical-loads panel that isolates the well pump, refrigerator, HVAC blower, and a few lighting circuits. The upgrade adds $2,500-$4,500. A critical-loads panel is the lower-cost route and keeps your essential systems running through most outages. Call us at (877) 550-6892 and we’ll tell you which one fits your panel and your budget.
If you live in Joshua and you’re tired of scrambling for a generator every time Oncor blinks, let’s talk. Free estimates, real numbers off your actual bill, and no pressure to sign anything tonight. The senior and veteran 10% discount never expires. Call (877) 550-6892.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Joshua and Johnson County since 2011.