SunPower SunVault

Published figures

No figures have been collected for motor-start current and units per system.

Stated stack range

Largest stated stack: 52 kWh (energy basis not stated).

Compare stated stack ranges.

Usable and nominal energy

Nominal energy is the stated total stored energy. Usable energy is the stated amount available to draw.

SunPower SunVault 13: SunPower SunVault states 12 kWh usable and 13 kWh nominal energy (92% usable).

SunPower SunVault 26: SunPower SunVault states 24 kWh usable and 26 kWh nominal energy (92% usable).

Compare usable and nominal energy.

Stated temperature limits

Stated operating range: 14°F (−10°C) to 113°F (45°C), SunPower SunVault 13.

Stated operating range: 14°F (−10°C) to 113°F (45°C), SunPower SunVault 26.

Compare temperature limits.

After you enter a ZIP code, day counts describe outdoor air at the nearest station. A garage or indoor unit sees different air from the station. Output reductions inside the stated range are not counted.

Warranty terms

The stated 38 MWh equals 3,166 full cycles of its 12 kWh usable energy, SunPower SunVault 13.

Compare warranties.

Features the manufacturer states

Configurations

Configurations named by the figures

• SunVault 13
• SunVault 19.5
• SunVault 26

Government and program lists

This product is on none of the lists this site reads.

Installs

Medians require at least 20 priced installs for the named measure and period.

• Connecticut records 78 installs, 2022–2024. Source: Connecticut Energy Storage Solutions — enrollment. Median battery cost, 2022–2024: $1,705 per kWh, from 78 priced installs.

A count of installs says how many were installed, not how well they work. A median price is the middle reported price.

What Connecticut homes paid

All recorded installs were paired with solar PV.

Figures are medians. Parentheses give the middle half of prices. A dash means too few prices for a median.

Contract prices may include solar or other equipment. Prices are before the up-front incentive. Approvals run through Sep 29, 2026. Counts and prices are from the program’s Oct 1, 2026 release.

Compare recorded Connecticut prices.

Recalls and safety notices

No notice in the recall sources this site reads is matched to this product. That is not a safety finding. See every recall notice.

• UL 9540 listed: Yes (SunPower SunVault 26, SunPower SunVault 13)
  Spec sheet, at p.1 Warranties, Certifications, and Compliance, retrieved Sep 25, 2026 Not yet checked
• UL 9540A tested: Yes (SunPower SunVault 26, SunPower SunVault 13)
  Spec sheet, at p.1 Warranties, Certifications, and Compliance, retrieved Sep 25, 2026 Not yet checked

The maker states the listing or test. The listing body's records have not been checked.

Backup hours from your load

The stated usable energy divided by your load gives hours, starting with a full battery.

Peak power: 10 kW (1 second)

Peak power: 12 kW (10 seconds)

Backup hours follow the California Air Resources Board’s Zero Emissions Residential Backup Power Tool. Appliance figures come from the US Department of Energy’s Estimating Appliance and Home Electronic Energy Use (2012).

• The appliance figures are nameplate maximums. Average demand changes as appliances cycle and their settings change.
• A load above the stated continuous power gets no figure.
• Motor starts use three times the largest selected motor’s watts, plus the other loads. This estimate is checked against stated peak power when available. Other loads are counted at their running watts.
• Inverter and battery losses are not counted. A field study of household backup power explains the gap.
• Solar recharge, reserves, and temperature changes are outside the calculation.