Loading NuWatt Energy...
We use your location to provide localized solar offers and incentives.
We serve MA, NH, CT, RI, ME, VT, NJ, PA, and TX
Loading NuWatt Energy...
NuWatt designs, installs, and manages solar, battery, heat pump, and EV charger systems across 9 states. One company, one warranty, one point of contact.
Get a Free QuoteReview, specs, and the honest install recommendation.
Quick Answer
Panasonic EverVolt EverVolt 2.0 Gen 3: 13.5 kWh LFP battery with 9 kW continuous / 15 kW peak output. NuWatt does not install this battery. Panasonic EverVolt is a brand license — the battery is not manufactured by Panasonic Corporation and the warranty routes through the US license holder, not Panasonic. For a genuine premium battery with a clear warranty path, NuWatt installs Tesla Powerwall 3.
Panasonic EverVolt is a brand license — the battery is not manufactured by Panasonic Corporation and the warranty routes through the US license holder, not Panasonic. For a genuine premium battery with a clear warranty path, NuWatt installs Tesla Powerwall 3.
Capacity
13.5 kWh
Continuous
9 kW
Peak
15 kW
Warranty
12-yr
Price
$11.5-15.5k
Key features
Best for
Spec sheet
Made in Varies by production run (license arrangement)
Panasonic EverVolt is a brand license — the battery is not manufactured by Panasonic Corporation and the warranty routes through the US license holder, not Panasonic. For a genuine premium battery with a clear warranty path, NuWatt installs Tesla Powerwall 3.
NuWatt’s pick
Our single-unit whole-home backup pick. Powerwall 3 delivers the highest continuous and peak power of any residential battery, with integrated solar inverter and proven Tesla warranty support.
Capacity
13.5 kWh
Power
11.5 kW
Chemistry
LFP
Warranty
10-yr
Run the math yourself
Both tools below are pre-configured to the Panasonic EverVolt EverVolt 2.0 Gen 3. Pick the appliances you need during an outage, adjust your annual outage hours, and compare against a generator.
Pick what stays on during an outage
Critical loads
4 selected
Simulated runtime
Battery can handle thisRuntime
2.3
days
Avg load
0.2
kW (of 9 kW max)
Peak surge
3.5
kW (of 15 kW peak)
Runtime calculated from 13.5 kWh usable × 96% round-trip efficiency = 13.0 kWh effective storage, divided by average load. Duty cycles assume intermittent operation (fridges cycle ~40% of the time, AC ~50%).
25-year total cost of ownership
Verdict
Break even over 25 years
Within 10% over 25 years — lifestyle factors (noise, emissions, maintenance) likely decide it.
22 kW standby
25-year total
$31,578
Panasonic EverVolt EverVolt 2.0 Gen 3
25-year total
$29,717
Side-by-side
Net difference: $1,861 in favor of the battery
Beyond dollars
CO2 emissions (25-yr)
Noise while running
Like a dishwasher
Cutover time
Battery = no lights flicker
How we calculated this
This tool is honest by design: for homes with high annual outage hours, the right generator can beat a small battery on dollars alone. Decide what you’re optimizing for — up-front cost, lifetime cost, silence, emissions, or never hearing a pull-cord again.
Brand stability
Like the Panasonic EverVolt solar panel line, the Panasonic EverVolt battery is a brand-license arrangement in the US. The actual cells and assembly may vary by production run. Warranty claims route through the license holder, not Panasonic Corporation directly. Treat warranty confidence accordingly.
Last reviewed: 2026-04-09
Federal ITC / domestic content
Like the Panasonic EverVolt solar panel line, the battery is a brand license. Cell source and manufacturing location vary by production run and are not publicly disclosed. For commercial ITC projects, request a written cell-origin declaration before specifying.
Informational only — not tax advice. Confirm ITC qualification with a tax professional.
Free instant estimate. Takes 60 seconds. No pressure.
Start my free quoteFrequently asked
No. NuWatt does not currently install the Panasonic EverVolt EverVolt 2.0 Gen 3. For the same use case, we install the Tesla Powerwall 3 — see the "NuWatt's recommendation" section above for a detailed comparison.
The Panasonic EverVolt EverVolt 2.0 Gen 3 has 13.5 kWh of nameplate capacity and 13.5 kWh of usable capacity — full nameplate capacity is accessible. Use the interactive outage simulator on this page to see exactly how long that capacity will run your specific appliances.
The Panasonic EverVolt EverVolt 2.0 Gen 3 uses LFP chemistry. LFP (Lithium Iron Phosphate) is the safest residential battery chemistry available, with no thermal-runaway risk and typical cycle life of 5,000–10,000 cycles. LFP is the dominant chemistry for new residential battery products in 2026.
12-year product warranty with a 6,000-cycle guarantee (whichever comes first). Note: Panasonic EverVolt's parent company is on our watchlist — see the Brand Stability section on this page for details on warranty enforcement risk.
Yes. Residential home batteries remain eligible for the 30% federal Investment Tax Credit in 2026 when paired with solar (Section 48E) or installed standalone under the IRA provisions. This is different from the residential solar panel credit (Section 25D) which expired December 31, 2025. For commercial ITC projects, see the FEOC section on this page for domestic-content-adder eligibility.