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Whole-Home Backup

Tesla Powerwall and Generac, installed by people who own both.

Vermont winters mean outages. We're a Tesla Certified Powerwall installer and a Generac authorized dealer, which means we can quote either side of the battery vs generator question without trying to push you toward whichever one we happen to sell.

Tesla Certified Installer
Generac Authorized Dealer
Free In-Home Assessment
🔋
Powerwall 3
13.5 kWh
Generac 22kW
Whole Home
The Honest Answer

Battery or generator? Depends on your house.

14hr
Avg Vermont Outage
$0
For The Assessment

Most of our backup power calls come in October, when the leaves are coming down and the first ice storms have already knocked out power on a few of our customers' streets. By that point getting on the install schedule is hard.

"The right time to think about backup power is in the summer, when nobody else is. Call us in July, you're on the truck by August. Call us in October, you're waiting until February."
Tom on Timing

We do a free in-home assessment before we ever quote a number. We look at your panel, your loads, your fuel situation if you're considering a generator, where the equipment would physically go, and what you actually want backed up. Some homeowners want everything. Some just want the well pump, the fridge, and a couple of outlets to run a laptop. Both are valid and the systems look very different.

The honest answer on Powerwall vs Generac depends on three things: how often your power goes out, how long the outages typically last, and whether you have solar or are planning to add it. Here's the short version:

🔋 Powerwall
Best for solar homes
Quiet, no fuel, pairs with panels, 12 to 18 hours of critical loads on a single unit. Ideal if outages are short and frequent.
⚡ Generac
Best for long outages
Runs as long as you have propane. Handles whole-home loads including the well pump and EV charger. Ideal for rural homes.

We'll walk you through the math at the assessment, line by line, with the equipment costs and the install costs separated so you can see exactly what you're paying for.

Three common configurations and what they actually cost.

These are real numbers for installs we do most often. The free in-home assessment gets you a firm quote.

Single Powerwall 3
$11,500installed

Critical loads only. Backs up your fridge, freezer, well pump, furnace, and a handful of outlets and lights for 12 to 18 hours of outage.

  • Powerwall 3 with integrated inverter
  • Backup gateway and critical loads panel
  • Permit and Green Mountain Power coordination
  • Tesla app setup and walkthrough
  • One-year workmanship warranty
Dual Powerwall + Solar
$22,500installed

Whole-home backup with battery storage. Pairs with new or existing solar. Multi-day backup if you ration loads. Eligible for federal tax credit.

  • Two Powerwall 3 units, 27kWh total
  • Whole-home backup gateway
  • Solar inverter integration
  • Time-of-use load management
  • Federal 30% tax credit eligible

Tesla and Generac are most of our work, but we install other brands too.

Manufacturer-certified on the two big ones, comfortable installing the rest.

Tesla Powerwall 3
Certified installer
Generac Guardian
Authorized dealer
Generac PWRcell
Battery storage
Kohler Standby
14kW to 26kW
Briggs & Stratton
Standby generators
Enphase IQ Battery
5P storage
FranklinWH
aPower battery
Portable Hookups
Inlet boxes, transfer switches

From assessment to backed up.

01
Free assessment
Tom or Jake comes out, looks at your panel and loads, asks what you actually need backed up, and walks you through the Powerwall vs generator decision honestly.
02
Firm quote
You get a written quote within 48 hours. The number on the quote is the number you pay. Equipment, install, permits, all of it.
03
Install week
Most installs take 1 to 3 days depending on the complexity. We coordinate the power-down with Green Mountain Power and the propane company on Generac jobs.
04
Test and walkthrough
We simulate an outage, watch the system fail over, and walk you through how to use the app and the manual transfer switch in case you ever need it.

Backup power questions we get a lot.

Powerwall or generator, which one is better?
Depends on your situation. Powerwalls are quiet, low-maintenance, and pair beautifully with solar, but they have finite capacity (one Powerwall is good for 12 to 18 hours of critical loads, two for 24 to 36). Generators run as long as you have fuel, handle huge loads without breaking a sweat, and are usually cheaper per kWh, but they're loud, they require annual service, and propane runs out. We'll walk you through the tradeoffs at the free assessment.
Will a single Powerwall run my whole house?
Honestly, no. One Powerwall is sized for critical loads (fridge, freezer, well pump, furnace, lights, a few outlets). If you want to run the EV charger, the electric range, and the central AC at the same time during an outage, you need two Powerwalls or a 22kW generator.
How loud is a Generac?
A 22kW Guardian runs at about 67 decibels at 7 feet, which is roughly the volume of a normal conversation. You'll know it's running, but it's not going to wake the neighbors. We site it as far from bedroom windows as your propane line will allow.
What about maintenance?
Powerwalls are basically maintenance-free. Tesla pushes firmware updates over wifi and the system self-monitors. Generators need an oil change once a year (we offer a service plan for $185/year that handles it). Both have warranties: Powerwall is 10 years, Generac Guardian is 5 years standard or 10 years extended.
Do you handle the propane and the gas line?
We coordinate with your propane company. The propane company runs the line from the tank to the generator pad and we tie everything in on the electrical side. If you're on natural gas, your gas company handles the gas line.
Will my Powerwall pay for itself?
If you pair it with solar and you're in a time-of-use rate plan, it can over a long enough horizon. If you're buying it purely for outage backup and you're not on a TOU plan, the math is harder. We'll be straight with you about that during the assessment instead of selling you a payback story that doesn't pencil out.

Need an electrician you'd actually recommend to your sister?

Tell us what's going on. We'll give you a real answer about whether we can help, when we can come out, and roughly what it'll cost. No pressure, no upsells, no weird sales scripts.