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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
Enphase IQ Battery 5P: 5 kWh LFP battery with 3.84 kW continuous / 5.76 kW peak output. NuWatt installs this as our modular-expansion pick. start with one 5 kwh unit, add more as needs grow. best for homeowners who want to start small with essential-load backup and scale into whole-home over time.
Our modular-expansion pick. Start with one 5 kWh unit, add more as needs grow. Best for homeowners who want to start small with essential-load backup and scale into whole-home over time.
Capacity
5 kWh
Continuous
3.84 kW
Peak
5.76 kW
Warranty
15-yr
Price
$7.5-9.5k
Key features
Best for
Spec sheet
Made in USA (contract manufactured, multiple sites)
Run the math yourself
Pick the appliances you need during an outage and see exactly how long the Enphase IQ Battery 5P will run them.
Pick what stays on during an outage
Critical loads
4 selected
Simulated runtime
Battery can handle thisRuntime
20.3
hours
Avg load
0.2
kW (of 3.84 kW max)
Peak surge
3.5
kW (of 5.76 kW peak)
Runtime calculated from 5 kWh usable × 96% round-trip efficiency = 4.8 kWh effective storage, divided by average load. Duty cycles assume intermittent operation (fridges cycle ~40% of the time, AC ~50%).
Brand stability
Enphase Energy (NASDAQ: ENPH, ~$15B market cap) is the dominant US residential microinverter manufacturer. IQ Battery line has excellent field reliability. 15-year warranty is backed by a financially stable publicly-traded company with strong US market share.
Last reviewed: 2026-04-09
Federal ITC / domestic content
Enphase contract-manufactures in multiple US facilities. For commercial ITC projects, verify current cell sourcing with Enphase at time of quote — FEOC compliance depends on the specific supply chain snapshot.
Informational only — not tax advice. Confirm ITC qualification with a tax professional.
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Start my free quoteFrequently asked
Yes. The Enphase IQ Battery 5P is in our active install stack across all 9 states we serve (MA, CT, NH, RI, VT, ME, NJ, PA, TX). Reach out through the quote form for a free site assessment and installed-price quote.
The Enphase IQ Battery 5P has 5 kWh of nameplate capacity and 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 Enphase IQ Battery 5P 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.
15-year product warranty with a 4,000-cycle guarantee (whichever comes first). Enphase's warranty is backed by a financially stable parent company with a mature US warranty-service infrastructure.
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.