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Tesla Powerwall home batteries in Colorado

Powerwall is the home battery most Colorado solar installers offer. It's rated to 9,843 feet, which covers the Front Range and most mountain towns but not the very highest, and its warranty depends on a Tesla certified installer and an internet connection.

Headquarters: Austin, Texas, United States
Where it’s made: Tesla does not publish a factory for current Powerwall 3 production.
Warranty: 10 years, 70% capacity retained
Altitude: Rated to 9,843 ft (3,000 m)
Cold weather: Operates down to -4°F with built-in heating
Colorado installers: 10 of 83 in our October 2026 survey list Tesla Powerwall

Models for home backup

Powerwall 3

Usable energy	13.5 kWh (Tesla lists it as nominal battery energy, AC)
Continuous power	11.5 kW max continuous discharge; 5 kW max continuous charge; 15.4 kW off-grid discharge when PV-only (-20 to 25 C), per installation manual
Peak or surge	185 LRA load-start capability (1 s)
Largest system	Up to 4 Powerwall 3 units (limited to 3 for outdoor wall-mount or indoor installs), plus up to 3 Expansion units on the leader unit, for a maximum of 7 units
Whole or partial home	Both. Whole-home backup via Gateway 3 or Backup Switch; partial-home via Backup Gateway 2
Solar inverter	Yes, 20 kW max solar STC input, 6 MPPTs
Battery chemistry	not published on the datasheet

Powerwall 3 Expansion

Usable energy	13.5 kWh nominal per unit (distributor listing; Tesla's own system-design page does not state the kWh)
Continuous power	None of its own. It has no inverter, so it adds storage only and does not raise power output
Peak or surge	n/a (power comes from the Powerwall 3)
Largest system	Up to 3 per system, all on the leader Powerwall 3. Expansion units on a follower Powerwall 3 will not work
Whole or partial home	Same as the Powerwall 3 it is attached to

Warranty

10 years from installation, covering Powerwall 2 AC, Powerwall+ and Powerwall 3. Guarantees 70% energy retention (9.45 kWh of 13.5 kWh) at 10 years. Unlimited cycles when used for solar self-consumption or time-based control plus backup. Other uses are capped at 37.8 MWh of AC throughput. Must be bought from Tesla or a Tesla certified installer and installed in the US. Repair or modification by anyone else voids coverage. Tesla needs internet access for remote firmware updates: if the unit stays offline for long periods or is not registered, Tesla may honor only 4 years.

Altitude

Maximum elevation 3,000 m (9,843 ft), for both Powerwall 3 and the Expansion unit. No derating curve is published. Colorado sites above about 9,843 ft fall outside the rating.

Cold weather

Operating range -20 C to 50 C (-4 F to 122 F), with possible derating above 40 C (104 F). Tesla says Heat Mode keeps Powerwall 3 charging and discharging properly down to -4 F. A separate charging-temperature range is not published. Storage range is -20 C to 30 C.

Monitoring and the app

Tesla app, over Wi-Fi, Ethernet or built-in LTE cellular. Cellular is meant as the backup connection, and Tesla recommends Wi-Fi or Ethernet as the primary. Without internet, Powerwall keeps running in its last mode and still provides backup, but the app has no remote monitoring. Tesla does not say whether the app can connect locally during an outage. Storm Watch charges the battery to full ahead of forecast severe weather.

Recalls

2025-11-13: Certain Tesla Powerwall 2 AC Battery Power Systems (about 10,500 units). Powerwall 3 is not included.. Hazard: Lithium-ion cells can fail in normal use, causing overheating and in some cases smoke or flame: a fire and burn hazard. There were 22 overheating reports, including 6 of smoke and 5 of fire with minor property damage, and no injuries. The remedy is free replacement. Tesla remotely discharged affected units that were online, and owners should keep the system online and check the Tesla app.. CPSC notice

What a Colorado homeowner should know

Powerwall 3 has a built-in solar inverter (up to 20 kW of PV), so a new solar-plus-storage install needs no separate string inverter. Tesla says one unit can back up a whole home, depending on loads.
Warranty coverage requires purchase from Tesla or a Tesla certified installer and an ongoing internet connection. A long-offline or unregistered system may get only 4 years.
The 3,000 m (9,843 ft) maximum elevation covers the Front Range and most mountain towns, but not the highest sites such as Leadville.

Tesla Powerwall is sold and installed through certified installers. Tell us what you need and we’ll connect you with one who installs it in your area.

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Reviewed October 29, 2026 from manufacturer documents and CPSC records. Specs and terms change; confirm with the manufacturer or your installer. Colorado Peak Power is independent of Tesla Powerwall.

Sources

tesla.com /powerwall
cpsc.gov /Recalls/2026/Tesla-Recalls-Powerwall-2-AC-Battery-Power-Systems-Due-t
sec.gov /Archives/edgar/data/1318605/000162828026003952/tsla-20251231.htm
digitalassets.tesla.com /tesla-contents/image/upload/Powerwall_3_Datasheet_NA-EN_53.pdf
service.tesla.com /docs/Public/Energy/Powerwall/Powerwall-3-with-Gateway-3-Installation-
energylibrary.tesla.com /docs/Public/EnergyStorage/Powerwall/3/SystemDesign/en-us/GUID-2F10618
solarelectricsupply.com /tesla-power-wall-3-expansion
digitalassets.tesla.com /tesla-contents/image/upload/Powerwall_Warranty_US-EN.pdf
tesla.com /support/energy/powerwall/own/internet-connectivity