Battery Backup & Backup Power in Greenwood Village & Denver, CO
Tesla Powerwall, Enphase IQ, Generac PWRcell, and battery + generator combos that keep your Colorado home running.
About Our Battery Backup & Whole-Home Backup Power
Outages on the Front Range are short most of the time and brutal a few times a year. Battery backup gives you silent power during the short ones; a standby generator covers the long ones. Many of our customers run both, and BES installs and integrates the whole stack.
We install Tesla Powerwall 3, Enphase IQ Battery, Generac PWRcell, and Franklin aPower batteries. We also size and install whole-home transfer switches, sub-panels for critical loads, and gas standby generators when battery capacity is not enough. If you have solar, we wire the battery so it charges from the panels and powers your essentials when the grid is out.
Sizing matters more than brand. We measure your actual load before recommending anything.
Battery Backup & Whole-Home Backup Power
Every job includes the following - no hidden add-ons, no upcharges.
Tesla Powerwall 3
Whole-home backup with integrated solar inverter. 13.5 kWh per unit, stackable up to 40+ kWh, automatic outage switchover in milliseconds.
Enphase IQ Battery
Modular 5 kWh or 10 kWh blocks that pair seamlessly with Enphase microinverter solar. Per-circuit backup control through the Enphase app.
Generac PWRcell & Franklin
Generac PWRcell and Franklin aPower for homeowners who want a non-Tesla battery solution. Same whole-home backup capability.
Battery + Generator Combos
Battery for quiet, instant backup during the common short outages; standby generator for the rare multi-day outage. We integrate both so they coordinate automatically.
Critical-Loads Sub-Panels
Cannot afford to back up the whole house? We build a critical-loads sub-panel for furnace, fridge, lights, and a few outlets so a smaller battery covers what matters.
Solar-Ready Wiring
If solar is coming later, we wire the battery and panel so the future install drops in without a rework. Conduit, breaker space, and inverter location all pre-planned.
Battery Backup & Whole-Home Backup Power available across the Denver Metro
Same-day dispatch from our Greenwood Village office. Click your city for area-specific details.
- Battery Backup & Whole-Home Backup Power in Englewood Co
- Battery Backup & Whole-Home Backup Power in Lone Tree Co
- Battery Backup & Whole-Home Backup Power in Highlands Ranch Co
- Battery Backup & Whole-Home Backup Power in Douglas County Co
- Battery Backup & Whole-Home Backup Power in Centennial Co
- Battery Backup & Whole-Home Backup Power in Castle Pines Co
What Colorado Homeowners Say
“BES came out same-day when our AC went out during a heat wave. The tech was professional, explained everything, and had us cool again in under 2 hours. Highly recommend!”
Sarah M.
Greenwood Village, CO · AC Repair
“Had BES install a Level 2 EV charger in our garage. They handled the permit, the install was clean and professional, and they even helped us apply for the Colorado rebate. Excellent service!”
James T.
Parker, CO · EV Charger Installation
“After getting 3 quotes for our electrical panel upgrade, BES had the best price and the best reviews. The job was done on time, cleanly, and passed inspection the first time.”
Linda R.
Centennial, CO · Panel Upgrade
Battery Backup & Whole-Home Backup Power FAQs
A single Tesla Powerwall 3 fully installed runs $13,000–$18,000 before incentives. Two Powerwalls (recommended for whole-home with AC) run $22,000–$28,000. Federal IRA gives a 30% tax credit. Xcel currently offers a battery incentive on top. After both, most homeowners net out at $9,000–$20,000 depending on system size.
Depends on your loads. A 13.5 kWh Powerwall covers essentials (furnace, fridge, lights, internet, a few outlets) for 18–36 hours. Whole-home with AC needs 27–40 kWh for an overnight outage. We model your actual usage from your Xcel bill so the sizing is real, not a guess.
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Areas We Serve
Battery Backup & Whole-Home Backup Power available throughout Denver Metro & Douglas County.