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.
Before
After
Before
After
Before
AfterFast, Reliable Solar Battery Storage & Backup Across Marble Falls
Solar battery storage in Marble Falls costs between $9,500 and $16,500 for a single-battery retrofit, and $18,000 to $34,000 for whole-home backup with two or three batteries. Because Pedernales Electric Cooperative credits exported solar at avoided-cost rates rather than retail net metering, a battery changes the entire economics of your solar array. If you’re tired of watching your panels pump power to PEC all afternoon while you buy it back at full price every evening, call Gus’s Solar at (877) 550-6892. We’ll pull your actual bill and show you the year-25 numbers before you spend a dime.
Why Gus’s Solar Is Marble Falls’s Preferred Solar Battery Storage & Backup Company
Gus Petrakis founded this company in 2011 and put his own name on the truck. That’s not marketing, it’s how the man operates. When a Marble Falls homeowner calls with a battery question, Gus answers. Not a call center, not a ticket queue. The same applies when something goes wrong. The 90-Day Done Right Promise covers every solar job in writing, and a live person answers the phone 24/7. If the system acts up at 2 a.m. during a PEC outage, someone picks up.
We’ve worked throughout the 78654 ZIP code long enough to know the difference between a Gregg Ranch bungalow and a lakefront build near the Colorado River. Crews scheduled for Marble Falls jobs come from the Austin metro office, but the people doing the work are Gus’s own background-checked, uniformed technicians. We don’t hand your roof or your electrical panel to a subcontractor we met last week.
Reviews from Marble Falls customers mention the same things over and over: straight numbers, no pressure, and a crew that shows up on time. Gus tells every customer the same thing: ‘Take two weeks. Think about it. The price will be the same.’ That is how an owner-operated shop treats its neighbors.
Our Solar Battery Storage & Backup Services in Marble Falls
Tesla Powerwall Installation
A single Tesla Powerwall 3 in Marble Falls typically runs $12,500 to $16,000 installed and integrates cleanly with most existing inverters. For lakefront homes along Lake Marble Falls or near the 1431 corridor, a Powerwall gives you seamless switchover during PEC’s frequent summer storm outages. We quote the year-25 output, not the day-one brochure number. That means telling you exactly what the battery will still do in year 15, not what the spec sheet promises today.
Enphase IQ Battery Installation
Enphase IQ Battery 5P systems in Marble Falls usually run $9,500 to $13,500 for the first unit and scale from there. They pair especially well with microinverter arrays, which matter on Hill Country homes where roof faces point at the lake view instead of true south. If your roof is a split multi-plane layout with azimuths 60 to 120 degrees off optimal, Enphase’s per-panel architecture avoids the bottleneck a string inverter creates.
Whole-Home Backup Power
Whole-home backup for a typical Marble Falls home means two to three batteries, running $22,000 to $34,000 installed. That covers central AC, refrigeration, medical equipment, and a well pump if you’re on one. For retirees in the 55+ communities off RR 1431 who rely on CPAP machines or refrigerated medication, this is not a luxury add-on. It’s the thing that keeps the lights on when a hailstorm knocks out the feeder to Granite Shoals and the surrounding county.
Battery Retrofit for Existing Solar
If you already have panels and PEC’s avoided-cost buyback is eating your return, a battery retrofit is the fix. Most Marble Falls retrofits of an existing 8 to 12 kW array run $10,500 to $18,000 depending on your inverter. We start by pulling your PEC statement, not a brochure estimate. Then we design the system to charge during the solar day and discharge through the evening hours when PEC would otherwise sell your own power back to you at retail.
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 Marble Falls
We install and service Tesla, Enphase, and FranklinWH batteries, and we keep common replacement parts and firmware tools stocked for Marble Falls service calls. When a battery faults in August, you do not want to wait two weeks for a part to ship from California. We work with panel brands including Qcells, REC, and SunPower for array retrofits and rebuilds. Whether it’s an Enphase IQ Battery 5P on a Gregg Ranch bungalow or a FranklinWH aPower system on a lakeview property, our crew knows the hardware without reading the manual in your driveway. For a complete look at what we offer, see our Solar Battery Storage & Backup services.
Common Solar Battery Storage & Backup Problems We See in Marble Falls Homes
- PEC avoided-cost buyback reducing solar payback. Homeowners who installed panels expecting retail net metering discover PEC credits exported power at a much lower avoided-cost rate. A properly sized battery eliminates most of that export by storing power for evening use, but it must be designed for self-consumption from day one, not bolted on later.
- Sealed lead-acid batteries failing in summer attic heat. Older backup systems installed before 2017 degrade quickly when summers push attic temperatures past 130 degrees. Without active cooling, capacity drops below the level needed for a refrigerator, freezer, and medical equipment just when hail season takes the grid down.
- Inverter thermal throttling on west-facing garage walls. Lakeview homes with north-oriented roof faces often put inverters on west-facing garage walls, where afternoon heat derates charge and discharge output by 20% or more. Proper ventilation clearance and placement matter more in Marble Falls than in shaded urban neighborhoods.
- Snowbird homes left empty for three or four months. Seasonal residents who leave Marble Falls in late spring come back to dead batteries, spoiled freezers, and mystery electrical bills. A properly configured backup system with remote monitoring changes that completely.
Pricing for Solar Battery Storage & Backup in Marble Falls, TX
| Service | Typical Marble Falls Range |
|---|---|
| Single battery retrofit (Enphase IQ 5P) | $9,500 - $13,500 |
| Tesla Powerwall 3 installation | $12,500 - $16,000 |
| Two-battery whole-home backup | $22,000 - $28,000 |
| Three-battery whole-home backup | $28,000 - $34,000 |
| Battery replacement (existing system) | $8,000 - $14,000 |
| PEC interconnection paperwork and coordination | $450 - $900 |
What moves the number: your existing inverter type, whether PEC requires a new interconnection application, the number of sub-panels, and how much of your home you want backed up. Bring us an actual PEC bill and we will give you a real quote off your real usage. Estimates are free, and the number we quote is the number you pay. Call (877) 550-6892.
We Also Serve Cities Near Marble Falls
Gus’s Solar handles battery storage and backup jobs throughout the Highland Lakes area. You’ll find us in Lago Vista, Leander, Bee Cave, and Lakeway on a regular schedule. If you’re anywhere around Marble Falls or the surrounding hill country, call and ask when the next crew is headed your way. More often than not, it’s the same week.
Serving Marble Falls, TX - Our Local Coverage Area
We’re based in the Marble Falls 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 Marble Falls
PEC credits exported solar at an avoided-cost rate that is roughly a third to half of the retail rate, while Austin Energy’s older net metering programs credited closer to retail. That means a Marble Falls homeowner’s battery pays for itself by shifting solar from afternoon export to evening self-consumption, avoiding both the low avoided-cost credit and the full retail purchase. A correctly sized battery typically shortens the combined solar-plus-storage payback from 13+ years down to 9 to 11 years for a Marble Falls home, depending on your usage and PEC rate schedule. Call (877) 550-6892 and we’ll run your actual bill through the math.
Yes. Standing-seam metal roofs take clamp-based racking that grips the seams without penetrating the roof surface, so battery and array work does not disturb the roof warranty. We use the same clamp system on lakefront and golf-community homes along Lake Marble Falls and around the 1431 corridor. Gus’s crew flashes every roof penetration properly and does not hand the work off to a sub.
Lithium iron phosphate (LFP) batteries like the Enphase IQ 5P and the Tesla Powerwall 3 are rated for the temperature swings that kill older sealed lead-acid units, and both are specified for California and Texas-grade heat when installed with proper ventilation clearance. We always locate batteries out of direct attic exposure and add ventilation when the placement demands it. LFP chemistry also holds up to 4,000 to 6,000 cycles, which for a Marble Falls household means 12 to 15 years before meaningful capacity fade.
For an empty home, 10 to 13.5 kWh of battery capacity covers the refrigerator, a freezer, security cameras, a router for remote monitoring, and a garage door opener, which is what most snowbird customers settle on. We recently retrofitted an Enphase IQ Battery 5P system for a couple in the Gregg Ranch 55+ community off RR 1431 whose 2018 array was exporting all summer to PEC at avoided-cost while they paid full retail every winter evening. We rebalanced their microinverters to prioritize self-consumption and set the battery to charge from solar during the day and power the refrigerator, medical equipment, and a garage door opener through the night. Their true-up statement now shows nearly flat winter bills with no behavioral changes. Call (877) 550-6892 to talk through what your home needs while you’re away.
Yes, in most cases PEC requires a new interconnection application when adding battery storage, and the utility’s approval timeline is now the single biggest variable in every Marble Falls project, sometimes adding two to six weeks. We handle the entire PEC submission for you, including single-line diagrams and equipment documentation, so you are not stuck navigating the utility portal. The $450 to $900 PEC coordination fee we quote includes the application, follow-ups, and scheduling the final inspection.
Gus’s Solar is not a door-knocking outfit. We do not need a signature tonight, and we will not push a battery you do not need. Bring us a bill, I’ll bring you the math. Call (877) 550-6892 for a free estimate and a written quote that holds for two weeks. Take the time. The price will be the same.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Marble Falls and the Highland Lakes since 2011.