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Fast, Reliable Solar Battery Storage & Backup Across Selma
Solar battery storage in Selma, TX typically runs between $9,500 and $16,500 after the federal tax credit, depending on whether you’re adding a single battery or a whole-home setup. Most Selma homeowners call us because their grid-tied solar produces plenty of power in July but leaves them dark the moment CPS Energy or a storm takes down the line. We install, retrofit, and service battery systems across Selma’s older ranch neighborhoods, and we can usually have a quote in your hands within 48 hours. Call (877) 550-6892 if you want to talk through your options with someone who actually answers the phone.
Selma sits right in the path of Texas summer thunderstorms and the occasional winter ice event. When the power goes out, it doesn’t care that you already paid for solar panels. A battery changes that equation. We’ve been working on Selma homes long enough to know which 1970s-era panels need upgrading before a battery can even be permitted, and which retrofit routes save you the most money. That local knowledge is the difference between a system that works on paper and one that works when you need it.
Why Gus’s Solar Is Selma’s Preferred Solar Battery Storage & Backup Company
Gus Petrakis put his name on this company in 2011, and he still answers his own phone. That matters in Selma, where homeowners have seen plenty of out-of-town crews roll through, slap panels on a roof, and disappear the first time something underperforms. Our customers around Schertz and Universal City know the difference. A live person picks up when you call, and Gus’s own background-checked crew does the install work, not a subcontractor we’ve never met.
We’ve built our reputation in the San Antonio metro by being straight with people. Bring us your CPS Energy bill and we’ll build the math off your actual usage, not a brochure estimate. If a battery doesn’t pencil out for your home, we’ll tell you that before we ever take a deposit. That’s why Selma homeowners keep our number saved in their phones. The 90-Day Done Right Promise means if something isn’t right, Gus makes it right. In writing, on every job.
We coordinate scheduling from our San Antonio office, and our crews serve Selma locally. Response time to most Selma neighborhoods is same-day for service calls and under 48 hours for new battery quotes. When a homeowner near the Retama Park area called us about a battery that stopped charging during a foggy week, we had a technician there the next morning. That’s how we operate.
Our Solar Battery Storage & Backup Services in Selma
Tesla Powerwall Installation
The Tesla Powerwall remains the most requested battery for Selma homes, and for good reason. It’s a 13.5 kWh unit that handles whole-home backup in most single-story ranch layouts, especially when paired with a second unit. We install Powerwall 3 systems regularly across Selma’s 93662 zip code, and we size the battery against your actual evening usage, not a generic square-footage formula. If your AC condenser is older, we’ll tell you what a single Powerwall can realistically carry before you spend the money.

Enphase IQ Battery Installation
Enphase IQ Battery 5P systems are a strong fit for Selma homeowners who already have Enphase microinverters on the roof. The modular design means you can start with one 5 kWh unit and add capacity later without rewiring everything. We’ve installed these on homes near Selma City Park and along Evans Road, and the flexibility works well for homeowners who aren’t sure yet whether they’ll go whole-home or partial backup. The 5P also runs quieter than many competing units, which matters when the battery hangs on a garage wall next to a bedroom.

Whole-Home Backup Power
Whole-home backup in Selma means sizing a battery system to carry your air conditioner, refrigerator, lights, and well pump if you’re on one of the outer properties toward Cibolo. Most Selma ranch homes need at least two batteries, sometimes three, to keep a 3-ton AC compressor running through a summer outage. We’ll look at your panel, your utility usage history, and your actual cooling load before we recommend a number. That’s the only honest way to do it.

Battery Retrofit for Existing Solar
This is the service we do more than any other in Selma. Homeowners bought grid-tied solar years ago, before battery prices dropped, and now they want backup. The good news is that most existing systems retrofit cleanly. The challenge in Selma is the electrical service: a high percentage of homes here still run on original 100-amp panels, which means the utility won’t approve the battery interconnection until the service is upgraded. We handle that upgrade as part of the retrofit, and we’ll show you the line item for it so there’s no sticker shock. A typical 200-amp service upgrade in Selma runs $2,800 to $4,200, depending on the meter location and whether your panel is flush-mounted in a wall.

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 Selma
We work with the battery and inverter brands Selma homeowners ask for by name: Tesla, Enphase, FranklinWH, and SolarEdge among them. We stock common replacement parts and firmware updates locally through our San Antonio hub, which means faster turnaround when a Selma system needs service. If you already have a SolarEdge inverter and want to add a FranklinWH aPower battery, we’ll design it so everything communicates properly. No brand evangelism, just straight recommendations based on what works for your roof, your panel, and your usage pattern. Call (877) 550-6892 and we’ll talk through which direction makes sense for your home.
Common Solar Battery Storage & Backup Problems We See in Selma Homes
- Battery won’t charge during winter low-production stretches. Selma’s position in the San Antonio corridor means shorter winter days and occasional multi-day cloud cover. Homeowners with systems sized only for summer peak sun discover their battery never reaches full charge in January, leaving them without backup exactly when an ice storm threatens. We model annual production averages, not July numbers, when we size batteries for Selma homes.
- NEM and time-of-use settings draining the battery at the wrong time. If your battery is exporting stored power to the grid at 2 p.m. instead of holding it for the 4 to 9 p.m. peak window, you’re losing real money every single day. We see this constantly on systems installed by out-of-state companies that never came back to commission the settings properly. A settings correction alone often recovers hundreds of dollars per year on a Selma electric bill.
- Thermal derating on 105°F afternoons cutting solar production below what the battery needs. Selma summers are brutal, and when panel surface temps hit 160°F or higher, production drops 15 to 20 percent. That means your battery may not reach full charge before the evening peak on the hottest days, forcing your home to pull from the grid at premium rates. We account for this derating curve when we size your array and battery together.
- Original 100-amp panels blocking battery interconnection. Selma’s housing stock skews toward 1950s through 1980s ranch homes, and many still carry the original electrical service. The utility simply won’t approve a battery installation until the panel is upgraded to 200 amps. We surface this early in the quote process so you’re not blindsided by a permit rejection later.
Pricing for Solar Battery Storage & Backup in Selma, TX
A single Enphase IQ Battery 5P installed in Selma typically runs $6,800 to $8,500 before incentives. A Tesla Powerwall 3 installation lands between $9,000 and $11,500. Adding a second battery brings most whole-home setups to $16,000 to $22,000. If your Selma home needs a 200-amp panel upgrade first, budget $2,800 to $4,200 on top of that. The federal tax credit covers 30 percent of the total installed cost, including the panel work when it’s part of the battery project. Our Solar Battery Storage & Backup estimates are always free, and the number we quote is the number you pay. Take two weeks to think about it. The price will be the same.
We Also Serve Cities Near Selma
Our crews cover the whole northeast San Antonio corridor, including Selma and the surrounding communities of Schertz, Universal City, Cibolo, and Converse. If you’re just outside the Selma city limits on a county road, we still come out. The terrain, the housing stock, and the utility rates are consistent across this area, so our local knowledge carries straight over.
Serving Selma, TX - Our Local Coverage Area
We’re based in the Selma 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 Selma
Yes, if the system is sized for it. A single 13.5 kWh battery will typically run a 3-ton AC compressor plus essential loads for 6 to 10 hours, depending on how hard the unit is working and what else is drawing power. Two batteries will get most Selma ranch homes through an overnight outage with AC. Call (877) 550-6892 and we’ll model your specific cooling load against your utility data.
Most homes built before 1990 in Selma do, yes. The utility and city inspection process typically requires a 200-amp service for battery interconnection, and the original 100-amp panels common in Selma’s ranch housing stock won’t pass. We include the panel upgrade as a line item in your quote, so you see the real cost before you commit.
Yes, and it’s often the fastest payback on the whole system. By charging the battery from your solar during midday and discharging it during the 4 to 9 p.m. peak window, Selma homeowners typically cut their highest-rate usage by 80 to 90 percent. We’ve seen true-up statements drop by $600 to $1,200 per year depending on household size and cooling load.
Whole-home backup powers every circuit in your house during an outage. Partial backup powers a protected subpanel with your critical loads, usually the refrigerator, a few lights, outlets for medical equipment, and possibly one AC unit. Partial backup costs less because you need fewer batteries. For most Selma homeowners, a two-battery partial system that covers one AC unit and the kitchen is the sweet spot. We’ll show you both options with real prices before you decide.
Most single-battery retrofits take one to two working days on site, assuming no panel upgrade is needed. If your Selma home needs a 200-amp service upgrade first, add a day and expect a short wait for the utility to swap the meter. We schedule the panel work and the battery installation back-to-back so you’re not sitting in the dark between steps. Get a free estimate by calling (877) 550-6892 today.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Selma and the surrounding San Antonio corridor since 2011.






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