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.
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AfterFast, Reliable Solar Battery Storage & Backup Across Marble Falls
A whole-home battery backup in Marble Falls typically costs between $9,500 and $16,500 installed, and most projects take one to three days once the equipment arrives. The biggest variable isn’t labor or hardware. It’s how long Pedernales Electric Cooperative takes to approve the interconnection paperwork, which can add anywhere from two to eight weeks to the timeline.
We know this because we’ve been working around PEC’s process for years. We’re not an out-of-state crew that shows up once and disappears. Gus Petrakis owns the company, his name is on the truck, and he is the one who answers when you call (877) 550-6892 with a question about why your battery is derating in August heat.
Why Gus’s Solar Is Marble Falls’s Preferred Solar Battery Storage & Backup Company
Marble Falls is different from Austin or San Antonio, and the solar math here is different too. The folks we work with off 1431, around Pecan Valley, and up toward Granite Shoals tend to be over 55, many of them retired or semi-retired. They have seen the door-knockers. They have heard the “sign tonight” pitch. They don’t want a salesperson. They want a neighbor who will still be at the hardware store next year.
That’s why our process starts with your actual PEC bill. Not a brochure number. Bring us the bill, we’ll bring you the math. Gus quotes the year-25 output, not the day-one number. If adding a battery doesn’t actually make your bill cheaper over the life of the system, he’ll tell you that before you spend a dime.
We have been doing this since 2011. We’re locally owned, not a franchise, and our crew does our own installs. You’ll see background-checked, uniformed technicians on every job, and if something isn’t done right, our 90-Day Done Right Promise is in writing. One call brings Gus back.
Response time to Marble Falls is straightforward. Most service calls get scheduled within a few business days, and emergency no-power situations get prioritized. Calls are answered by a live person 24/7, not a voicemail tree.
Our Solar Battery Storage & Backup Services in Marble Falls
Our Solar Battery Storage & Backup work covers the full spectrum, from a single battery added to an existing array to a whole-home system designed around your backup priorities. Here’s what we do most often in the 78654 area.
Tesla Powerwall Installation
A Tesla Powerwall 3 installation in Marble Falls runs about $11,000 to $15,000 for the first battery including gateway and labor, before any applicable tax credit. Two Powerwalls handle most whole-home loads here, especially during summer afternoons when the AC is pulling hard and PEC’s avoided-cost export rate means you’d rather store your solar than send it back to the co-op for pennies.
Enphase IQ Battery Installation
Enphase IQ Battery 5P installations in Marble Falls typically run $9,500 to $13,500 depending on whether we’re pairing with new microinverters or retrofitting onto an existing Enphase system. For homes with standing-seam metal roofs and split arrays, Enphase is often the better architecture because each panel works independently. One shaded panel doesn’t drag down the whole string.
Whole-Home Backup Power
Whole-home backup for a Marble Falls house with a 4-ton AC and electric range generally needs two to three batteries, landing between $18,000 and $28,000 installed. We help you decide whether you really need whole-home coverage or whether a critical-loads panel covering the fridge, lights, medical equipment, and one AC zone gets you 90% of the benefit for half the cost.
Battery Retrofit for Existing Solar
This is the most common request we get in Marble Falls, and it’s the service where PEC paperwork matters most. Adding a battery to an existing system requires a new interconnection application, and the review timeline is entirely outside our control. A retrofit with a new hybrid inverter and one battery typically runs $10,000 to $14,000. If your system predates 2020 and uses a string inverter, you’ll likely need to replace that inverter as part of the retrofit.
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 Marble Falls
We work with the brands our Marble Falls customers actually ask for: Tesla, Enphase, FranklinWH, and SolarEdge for batteries and inverters, with panels from Qcells, REC, and Panasonic when a system needs array work too. We keep common replacement parts in local stock for faster turnaround. If a warranty claim comes up, we handle the paperwork. You shouldn’t have to spend three hours on hold with a manufacturer.
Common Solar Battery Storage & Backup Problems We See in Marble Falls Homes
- Battery thermal throttling in unventilated garages. Marble Falls summers push 100°F and hotter, and garage interiors can hit 120°F. Batteries derate or shut down entirely when they overheat, which is exactly when your AC needs backup. We always check installation location and ventilation clearances before mounting anything.
- PEC interconnection delays on battery retrofits. Homeowners assume adding a battery is plug-and-play. It isn’t. The co-op’s approval process can stall a project for weeks, and no installer can shortcut it. We tell you the timeline honestly up front and handle the paperwork for you.
- String inverter failures on shaded, metal-roof arrays. A single panel shaded by a standing-seam lip or the north-facing slope of a lakefront roof can kill production from an entire string. We reconfigure these systems with microinverters or split strings so one shaded panel stops being a single point of failure.
- Heat-related inverter faults in July and August. When the ambient temperature near an inverter exceeds its thermal threshold, it faults out. Our crew relocates inverters to shaded north walls and adds ventilation clearance, which solves most recurring fault codes without replacing the hardware.
Pricing for Solar Battery Storage & Backup in Marble Falls, TX
Here’s the straight answer. A single-battery retrofit in Marble Falls starts around $9,500. A new solar-plus-battery system with one battery runs $22,000 to $35,000 depending on array size, roof type, and whether you have a standing-seam metal roof that needs clamp-based racking. Two-battery setups for larger homes run $18,000 to $28,000. The federal investment tax credit applies to battery systems, and we’ll walk you through how it works on your specific return.
What moves the number in Marble Falls specifically? PEC paperwork timelines don’t change the price, but they change the schedule. Hail-resistant panel selection matters if you’re adding array capacity. And north-facing roofs mean we’re often adding microinverters and more panels than a south-facing site would need, which raises the equipment cost but keeps your production where it should be.
Want a real number? Call (877) 550-6892 with your PEC bill in hand. Estimates are free, and nobody will pressure you to sign anything tonight. Take two weeks. Think about it. The price will be the same.
We Also Serve Cities Near Marble Falls
Beyond Marble Falls proper, our crews work regularly in Lago Vista, Leander, Bee Cave, and Lakeway. Each of those communities has its own quirks, from HoA restrictions to different utility service areas, and we treat each job accordingly. Call (877) 550-6892 if you’re unsure whether we cover your address.
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
Because Pedernales Electric Cooperative credits exported solar at an avoided-cost rate well below retail, not the retail-rate net metering you’d get from a municipal utility. That means every kilowatt-hour you send back to PEC earns you far less than one you store and use yourself. Battery storage is what makes solar payback work in Marble Falls. It shifts the system from exporting cheap power to self-consuming valuable power. Call (877) 550-6892 and we’ll run the numbers on your actual bill.
Most pre-2020 systems need a new hybrid inverter to support battery storage, because older string inverters weren’t designed for bidirectional battery integration. The panels and racking usually stay. The inverter replacement plus one battery typically runs $10,000 to $14,000 in Marble Falls. If your original install was Enphase, you may be able to add IQ batteries with just a system controller upgrade, which is less expensive.
Yes. A properly installed battery system keeps itself charged and remains grid-connected while you’re away, and you can monitor production, consumption, and battery state from a phone app anywhere in the country. We recommend setting a minimum reserve percentage before you leave so the battery holds enough charge to power essentials if a storm knocks out the grid while you’re gone. Our crew recently configured exactly this setup for a lakefront home off Lakeshore Drive, and the owners watch the system from Minnesota all winter.
Batteries and inverters belong in protected spaces regardless of hail, and in Marble Falls that means a shaded north wall or a ventilated garage, never a west-facing exposure. The hail risk mostly affects panel selection, not battery placement. We spec IEC 61215 hail-impact-rated panels as standard for Marble Falls arrays, and we position inverters where the afternoon sun can’t push them into thermal fault territory. It’s a simple design decision that prevents most summer service calls.
No, but it changes the hardware spec. North-facing arrays in Marble Falls produce about 30 to 40% less than true south-facing arrays, so we offset that with more panels, split strings, and microinverters rather than a single string inverter. The economics still work because of the avoided-cost export issue with PEC, but the design has to be honest about orientation. We’ll show you the real production estimate before you spend anything.
Call Gus’s Solar for Battery Storage in Marble Falls
If you’re wondering whether a battery makes sense for your home, call (877) 550-6892. A live person answers. We’ll schedule a visit, look at your roof, your panel, and your PEC bill, and give you a number you can trust. No pressure, no “sign tonight” pitch. Just the math, done right.
Written by Gus Petrakis, Owner at Gus’s Solar, serving Marble Falls and the Highland Lakes communities.