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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
BLUETTI EP900 + B500: 9.9 kWh LFP battery with 9 kW continuous / 18 kW peak output. NuWatt does not install this battery. BLUETTI EP900 is a portable-power-derived product marketed as a home battery at aggressive pricing. Certification status varies by installation configuration and warranty support infrastructure is limited in the US. NuWatt installs Enphase IQ Battery 5P for entry-level home backup with a 15-year warranty from a US-stable manufacturer.
BLUETTI EP900 is a portable-power-derived product marketed as a home battery at aggressive pricing. Certification status varies by installation configuration and warranty support infrastructure is limited in the US. NuWatt installs Enphase IQ Battery 5P for entry-level home backup with a 15-year warranty from a US-stable manufacturer.
Capacity
9.9 kWh
Continuous
9 kW
Peak
18 kW
Warranty
10-yr
Price
$5.5-8.5k
Key features
Best for
Spec sheet
Made in China
BLUETTI EP900 is a portable-power-derived product marketed as a home battery at aggressive pricing. Certification status varies by installation configuration and warranty support infrastructure is limited in the US. NuWatt installs Enphase IQ Battery 5P for entry-level home backup with a 15-year warranty from a US-stable manufacturer.
NuWatt’s pick
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
Power
3.84 kW
Chemistry
LFP
Warranty
15-yr
Run the math yourself
Pick the appliances you need during an outage and see exactly how long the BLUETTI EP900 + B500 will run them.
Pick what stays on during an outage
Critical loads
4 selected
Simulated runtime
Battery can handle thisRuntime
1.6
days
Avg load
0.2
kW (of 9 kW max)
Peak surge
3.5
kW (of 18 kW peak)
Runtime calculated from 9.9 kWh usable × 90% round-trip efficiency = 8.9 kWh effective storage, divided by average load. Duty cycles assume intermittent operation (fridges cycle ~40% of the time, AC ~50%).
Brand stability
BLUETTI is owned by Shenzhen PowerOak Newener Co., a Chinese manufacturer specializing in portable power stations. Their "home battery" products are generally adapted portable-power units, not purpose-built residential systems. Not UL 9540 certified as a permanent home battery in many configurations — use caution for hard-wired installations.
Last reviewed: 2026-04-09
Federal ITC / domestic content
BLUETTI is a Chinese-owned brand (Shenzhen PowerOak Newener). Full FEOC exposure for commercial ITC projects and explicitly ineligible for the 10% federal ITC domestic content adder.
Informational only — not tax advice. Confirm ITC qualification with a tax professional.
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Start my free quoteFrequently asked
No. NuWatt does not currently install the BLUETTI EP900 + B500. For the same use case, we install the Enphase IQ Battery 5P — see the "NuWatt's recommendation" section above for a detailed comparison.
The BLUETTI EP900 + B500 has 9.9 kWh of nameplate capacity and 9.9 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 BLUETTI EP900 + B500 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.
10-year product warranty with a 6,000-cycle guarantee (whichever comes first). Note: BLUETTI'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.