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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.
Fast, Reliable Solar Battery Storage & Backup Across Joshua
Solar battery storage in Joshua, TX typically runs $9,500 to $18,500 installed, before any federal tax credit, and most of our Joshua jobs are finished in one to two days once equipment lands. If you’re in the 76058 zip code and you’re tired of watching your refrigerator go dark every time Oncor’s lines flicker during a spring storm, we can help. Gus’s Solar has been putting batteries in Joshua homes long enough to know the difference between what a spec sheet promises and what your well pump actually draws at 6 a.m. Call (877) 550-6892 and you’ll get a live person, not a voicemail.
Why Gus’s Solar Is Joshua’s Preferred Solar Battery Storage & Backup Company
We’re not a door-knocking outfit that parachutes into Joshua for a weekend and vanishes. Gus Petrakis put his name on the truck in 2011, and the same background-checked, uniformed crew that installs your battery is the crew you’ll see at the hardware store on FM 917 a month later. Homeowners around Johnson County call us because we quote the year-25 output off your actual Oncor bill, not a brochure number from a sales pitch. When a Joshua customer’s system underperforms, they don’t open a ticketing portal. They call and Gus answers.
Our response time to Joshua is same-day for emergencies and typically within 48 hours for new battery consultations. We know the newer tract subdivisions spreading across former ranch land south of County Road 913 just as well as the older ranch-style homes on half-acre lots off FM 1902. That matters when you’re deciding whether your 1983 ranch home’s roof can handle a racking system or whether ground-mount makes more sense. The price we quote is the price you pay, and we’ll tell you to take two weeks before you sign anything. If a salesman needs an answer tonight, the answer is no. That’s how we’ve done business for 29 years.
Our Solar Battery Storage & Backup Services in Joshua
Tesla Powerwall Installation
A single Tesla Powerwall 3 installation in Joshua typically runs $12,000 to $15,500 including gateway and electrical work. Two Powerwalls for whole-home coverage on a larger ranch property usually lands between $22,000 and $27,000. We install Powerwall systems on both rooftop and ground-mount arrays across Joshua, and we handle the Oncor interconnection paperwork so you don’t have to chase down a utility clerk in Fort Worth.

Enphase IQ Battery Installation
Enphase IQ Battery 5P systems run $9,500 to $13,000 for a single unit in Joshua, with most homes needing two or three units for real backup coverage. The modular design works well for Joshua’s smaller tract homes where a single Powerwall might be overkill but a whole-home generator is too loud and too much maintenance. Enphase pairs naturally with the IQ8 microinverters we already install on many Joshua roofs, which eliminates the single-point failure that older string inverters create.

Whole-Home Backup Power
Whole-home backup in Joshua means your well pump, HVAC blower, refrigerator, and lights keep running when Oncor’s transmission lines drop during a Johnson County thunderstorm. A full whole-home system with two or three batteries in the 76058 area typically runs $24,000 to $38,000 depending on your panel’s actual draw. We do a real load analysis off your utility history, not a guess. That’s the difference between a battery that keeps your freezer cold for two days and one that quits at midnight.

Battery Retrofit for Existing Solar
Roughly a third of our Joshua battery jobs are retrofits onto existing rooftop arrays, and those run $10,000 to $20,000 depending on what your current inverter setup looks like. Here’s the catch most Joshua homeowners don’t see coming: if your array was installed before 2021, it may lack rapid shutdown compliance, and adding a battery triggers an Oncor interconnection review that forces array rewiring. We flag that on the first visit, not the third invoice. The 2011-2021 string inverters on original Joshua ranch homes are hitting end-of-life right as folks try to add batteries, and nothing wrecks a retrofit faster than a battery charge controller rejecting voltage faults from a dying inverter.

What happens when you call
- 1
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 work with the equipment we’d put on our own homes, and in Joshua that means FranklinWH for whole-home resilience, Panasonic for long-cycle battery chemistry that holds up in Texas heat, and Canadian Solar panels that carry IEC 61215 impact ratings for Hail Alley weather. We keep common parts and connectors stocked for Joshua customers so a failed microinverter doesn’t mean waiting on a freight truck from California. If you bring us a quote from a national installer, we’ll give you a free second opinion and show you where the fine print hides the real year-25 numbers.
Common Solar Battery Storage & Backup Problems We See in Joshua Homes
- Legacy string inverters rejecting battery input: Homes built in the 2000s and early 2010s around Joshua often have string inverters reaching end-of-life, and when you add a battery, the charge controller sees voltage faults and refuses to charge. We replace the inverter or add microinverters before the battery goes in, so you’re not paying twice.
- Hail damage to panels that don’t carry IEC 61215 ratings: Johnson County sits in North Texas Hail Alley, and we regularly see cracked monocrystalline panels on Joshua roofs from storms that missed the insurance adjuster’s radar. A battery retrofit that ignores degraded panel output will overstate what the battery actually recharges, leaving you short during an outage.
- Oncor interconnection review delaying permits: Adding a battery to an existing permitted array in Joshua still requires a new Oncor interconnection application, because the utility needs to approve battery export behavior and rapid shutdown compliance. If your original installer skipped rapid shutdown, that’s a rewiring project, and we handle it from start to finish.
- Inconsistent HOA rules across newer subdivisions: Joshua’s newer 2000s and 2020s tract neighborhoods have wildly different HOA restrictions on ground-mount arrays and battery placement. We verify project-by-project before design is finalized, so you’re not three weeks into permitting and hit with a covenant violation.
Pricing for Solar Battery Storage & Backup in Joshua, TX
Here are straight numbers for the 76058 market. A single Enphase IQ Battery 5P starts around $9,500 installed. One Tesla Powerwall 3 with gateway runs $12,000 to $15,500. A two-battery whole-home backup system for a typical Joshua ranch home on well water lands between $24,000 and $32,000. Ground-mount arrays paired with batteries add $4,000 to $9,000 for racking, trenching, and concrete, depending on how far your array sits from the meter. The federal tax credit knocks 30% off the total system cost. Bring us a bill and we’ll bring you the math, built off your real usage and Oncor’s current export rates. Estimates are free, and the price won’t change if you take two weeks to think about it.
We Also Serve Cities Near Joshua
Our Solar Battery Storage & Backup crew works across Johnson County and the southern DFW edge. You’ll find us in Keene, Burleson, Crowley, and Cleburne, same crew, same 90-Day Done Right Promise. Whether you’re in a 1980s ranch house on a Joshua acreage or a newer Burleson tract home, the ground-mount-versus-rooftop math changes, and we’ll walk you through it the same way we do here in Joshua.
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
Because your battery changes how your system interacts with Oncor’s grid, and the utility needs to approve the new export behavior, inverter settings, and rapid shutdown compliance before you’re legal to operate. Even if your panels were permitted years ago, the battery is a new generating asset in Oncor’s eyes. If your original array was installed before 2021, expect a rapid shutdown review that may require rewiring before the battery can pass inspection. We handle the entire application for you, and we’ll tell you upfront if your array is going to need electrical work. Call (877) 550-6892 and we’ll check your system age and give you a straight answer.
For most Joshua ranch homes on half-acre or larger lots, ground-mount is the smarter choice, and it’s not close. Those 1980s roofs are forty years old, the decking is often ready for replacement, and the roof orientation on ranch-style homes frequently points the wrong way for peak production. A ground-mount array lets you orient panels due south at the ideal azimuth, clean them without climbing a ladder, and future-proof for hail damage with accessible replacement. You’ll pay $4,000 to $9,000 more for racking and trenching, but you’ll recover it in production gains and avoided roof work within a decade. On a two-acre lot off FM 1902, the answer is almost always ground-mount.
Yes, a properly sized battery system will run your well pump, HVAC blower, and refrigerator during a rolling blackout, but only if the system was designed around your actual starting loads. Well pumps draw a big surge when they kick on, and HVAC blowers do the same. We size Joshua battery systems off your utility history and the specific appliances you need to protect. A single Powerwall will run your well pump and lights through a multi-hour outage. Whole-home coverage for a ranch house with electric HVAC typically needs two or three batteries. We’ll show you the load math before you spend a dollar.
Oncor’s net metering terms apply across both Johnson and Tarrant counties because the utility’s territory spans the metro, but your bill structure may differ based on your retail electric provider. Oncor buys your excess generation at the avoided-cost rate, which has been falling for years, and that’s exactly why a battery changes the equation. Instead of exporting cheap power at 3 p.m. and buying it back expensive at 7 p.m., your battery lets you store midday production and use it during peak evening rates. Joshua homeowners with batteries typically see faster payback than solar-only customers because time-of-use arbitrage beats export credits. We’ll run the numbers off your actual bill, not a generic estimate.
Yes, and we won’t install panels in Joshua that don’t carry IEC 61215 impact ratings. Johnson County sees large-diameter hail almost every spring, and ground-mount arrays are actually more exposed than rooftop systems because there’s no roof deck absorbing partial impact. We specify Canadian Solar panels with verified hail ratings for Joshua ground-mount work and document those ratings clearly for your homeowners’ insurance file. Batteries are installed indoors or in hardened enclosures, so hail risk to the battery itself is minimal. If a storm does damage your array, our crew comes out, assesses, and handles the insurance documentation.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Joshua and Johnson County since 2011.






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