Free bill analysis - bring a power bill, get the production math for your actual roof, panel brands like Qcells and REC compared side by side
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 Hornsby Bend
A typical whole-home battery backup system in Hornsby Bend runs $12,500 to $18,000 before any utility credits, and most retrofits to existing solar land between $9,000 and $14,000 depending on panel compatibility. We serve every 78725 address, from the acreage lots along FM 969 to the newer construction pushing east toward the Colorado River bottomland. If you’re comparing quotes or just trying to figure out whether a battery makes sense on your side of the utility boundary, call (877) 550-6892 and we’ll walk through your actual bill with you. No signature tonight, no pressure. That’s not how Gus runs things.
Why Gus’s Solar Is Hornsby Bend’s Preferred Solar Battery Storage & Backup Company
Gus Petrakis founded this company in 2011 and still answers his own phone. Around Hornsby Bend, that matters. This is a place where half the residents have been here long enough to remember when 78725 was mostly farmland and river bottom, and where the other half just moved in and discovered their utility bill looks nothing like their neighbor’s across the road. We’ve spent years sorting out exactly that confusion for homeowners here.
Our techs know the Travis County ETJ permitting process, which most Hornsby Bend addresses fall under rather than City of Austin jurisdiction. That’s not a detail you want a national installer learning on your job. We pull the right permit the first time, we confirm the interconnection tariff before we quote, and our background-checked team does the install themselves. Every job carries the 90-Day Done Right Promise in writing: if it’s not right, Gus makes it right, and one call brings him back.
Reviews from Hornsby Bend customers consistently mention the same thing: the price quoted was the price charged, and a live person answered when they called. That’s our operating code. Local roots, on time, community first, accountable, loyal. Those aren’t slogans on a brochure. They’re how we’ve stayed in business for over 29 years in this region.
Our Solar Battery Storage & Backup Services in Hornsby Bend
We offer the full Solar Battery Storage & Backup lineup, but around Hornsby Bend, three services get called out most often: retrofitting existing solar, whole-home backup, and time-of-use optimization. Here’s how each works on the ground in 78725.
Tesla Powerwall Installation
A Tesla Powerwall 3 installed in Hornsby Bend typically runs $11,000 to $15,000 for the battery and gateway hardware before labor. On the Oncor side of the service boundary, that Powerwall can shift your self-consumption to avoid buying power at peak retail rates. On the Austin Energy side, the math changes entirely, because the Value of Solar tariff pays a fixed per-kWh credit regardless of when you use or export. We verify which side of the line your address sits on before we size anything.

Enphase IQ Battery Installation
For homes with existing Enphase microinverters, adding an IQ Battery 5P is usually the cleanest path to backup. In Hornsby Bend, we’re seeing quotes land around $8,000 to $11,000 for a single 5 kWh unit with installation. The catch on older systems: your existing IQ7 or IQ8 series gear needs to talk to the new battery, and sometimes the combiner box needs replacing too. We check all that before we quote, so the number doesn’t move on you later.

Whole-Home Backup Power
Whole-home backup in Hornsby Bend usually means planning for summer AC loads, which is a different animal than a fridge and a few lights. A single Powerwall 3 can typically carry a 3-ton AC unit for four to six hours in the Colorado River bottomland’s humid heat, but a 5-ton unit needs two batteries or serious load shedding. Homes on large acreage lots with wells, septic pumps, and outbuildings add load quickly. We map your actual panel circuits and give you a straight answer about what will and won’t run during an outage, not a generic brochure promise.

Battery Retrofit for Existing Solar
If your solar array is already producing and you’re wondering whether a battery can be added, the answer in Hornsby Bend is usually yes, with one common caveat: older rural panels and mobile home services often lack a main breaker rated for battery backfeed. That means a panel upgrade before the battery can pass inspection. Budget $2,500 to $4,500 for that upgrade if it’s needed. We’ll tell you on the first visit, so there’s no surprise on permit day.

Time-of-Use & NEM 3.0 Optimization
Hornsby Bend sits on a fragmented utility edge. If your property falls under Oncor with a competitive retail provider, your battery can be programmed to discharge during high-price windows and charge when rates are low. If you’re on Austin Energy’s Value of Solar tariff, that same battery logic changes, because the export credit is fixed per kWh and self-consumption becomes the primary financial lever. We program your system for the tariff you’re actually on, not the one a national installer guessed at.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Hornsby Bend
We work with the equipment we’d put on our own homes: Tesla, Enphase, SolarEdge, and FranklinWH. For Hornsby Bend customers, that means if your Powerwall throws a fault code or your Enphase system needs a firmware update, we don’t refer you to a manufacturer hotline. We stock common replacement parts locally and our crew can be at your 78725 address fast, often same week for non-emergency calls. FranklinWH’s aPower system is worth a look for larger acreage properties, because the modular design scales better across multiple outbuildings than a single wall-mounted unit.
Common Solar Battery Storage & Backup Problems We See in Hornsby Bend Homes
- Failed inspections from undersized main panels. Older ranch houses and mobile homes in Hornsby Bend frequently have 100-amp or 125-amp panels that aren’t rated for battery backfeed. Travis County ETJ inspectors will flag it every time. We check this before the permit is filed.
- Clogged battery air intakes from cottonwood and willow seed drift. The river bend microclimate along the Colorado creates more airborne seed and debris than the drier terrain just north. Outdoor battery units need their vents cleaned seasonally here, or cooling efficiency drops during humid July and August stretches.
- Misquoted export credits on the Austin Energy side of 78725. Some homeowners assume standard net metering applies. It often doesn’t in this ZIP code. If the tariff isn’t verified before the quote, the payback math is wrong from day one.
- Rapid shutdown and inverter compliance issues on retrofits. Adding a battery to an array installed five or ten years ago can require inverter reprogramming for NEC rapid shutdown compliance. We handle that in the same visit, but it’s a step national installers frequently skip until the inspector catches it.
Pricing for Solar Battery Storage & Backup in Hornsby Bend, TX
Here’s what we’re actually quoting in Hornsby Bend right now. A Tesla Powerwall 3 with gateway and installation: $11,000 to $15,000. An Enphase IQ Battery 5P added to existing Enphase solar: $8,000 to $11,000. A FranklinWH aPower unit for larger acreage homes: $13,000 to $17,000. Battery retrofit for existing solar with panel upgrade if needed: add $2,500 to $4,500. Whole-home backup configuration with two batteries and critical load panel: $22,000 to $30,000. These are installed prices before any federal tax credit or local incentive. Your exact number depends on your panel, your tariff side of the utility boundary, and whether your main service needs upgrading. Bring us a bill, we’ll bring you the math. Estimates are free, and the price will be the same in two weeks. Take the time to think about it.
We Also Serve Cities Near Hornsby Bend
Gus’s Solar serves Solar Battery Storage & Backup in Hornsby Bend and the surrounding communities daily. If you’re in Austin, Manor, Pflugerville, or Wells Branch, we run the same background-checked crews and the same written 90-Day Done Right Promise. Call (877) 550-6892 and we’ll send someone who knows your local utility rules.
Serving Hornsby Bend, TX - Our Local Coverage Area
We’re based in the Hornsby Bend 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 Hornsby Bend
On the Austin Energy side of the boundary in 78725, the Value of Solar tariff pays you a fixed per-kWh credit for your production regardless of whether you use it yourself or export it. That means a battery doesn’t change your export credit, but it does let you shift your self-consumption to avoid buying power at retail rates when your array isn’t producing. The real financial win in Hornsby Bend on VoS is reducing what you pull from the grid, not maximizing what you push onto it. Call (877) 550-6892 and we’ll confirm which tariff applies to your specific lot before we quote anything.
Most Hornsby Bend addresses fall under Travis County ETJ permitting rather than City of Austin jurisdiction, but you need to verify before the job starts because the process and inspection timeline differ. We confirm jurisdiction on every single Hornsby Bend battery install before pulling the permit. It saves failed inspections and wasted weeks.
Yes, in most cases we can add an Enphase IQ Battery to an older Enphase array, but the combiner box and microinverter firmware often need updating first. If your system is from before roughly 2017, you may need a partial hardware refresh. We’ll inspect your existing equipment and tell you exactly what’s required, and the quote won’t change after the fact. That’s the whole point of dealing with a local outfit that’s been at this since 2011.
A single Tesla Powerwall 3 can typically carry a 3-ton AC unit for four to six hours in Hornsby Bend’s humid summer conditions, but a 5-ton unit needs two batteries or selective load shedding. We map your actual circuits and give you a straight answer about what runs and for how long. No generic claims, just the real numbers for your house.
The utility side of your 78725 address is the single biggest variable in payback math. On the Oncor side with a competitive retail provider, battery payback often lands in the 7 to 10 year range when you shift usage away from peak rates. On the Austin Energy Value of Solar side, the battery’s job is self-consumption, and payback typically stretches to 10 to 13 years because the export credit is already fixed. Same ZIP code, same Powerwall, materially different numbers. That’s why we verify the interconnection tariff before we quote anything. Call (877) 550-6892 for an exact figure on your address, free.
Call Gus’s Solar for Hornsby Bend Battery Storage & Backup
If you’re ready to stop guessing about whether a battery pays off on your specific 78725 lot, call (877) 550-6892. A live person answers, day or night. We’ll verify your utility side, check your panel, and give you a written quote that includes everything. No pressure, no “sign tonight” nonsense. If a salesman needs an answer tonight, the answer is no. Gus Petrakis has been putting his name on solar work in this region since 2011, and that name is on every battery we install in Hornsby Bend.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Hornsby Bend since 2011.






Before
After
Before
After
Before
After