
SolarEdge
SolarEdge Home Battery
The default add-on for the millions of homes already running SolarEdge inverters. Its DC-coupled architecture is the technical selling point: solar charges the battery without a DC-AC-DC round trip, giving 94.5%+ efficiency - the best path from panel to stored kWh of anything here. 9.7kWh usable, 5kW continuous (7.5kW/10s peak), stacking three-high to 29.1kWh on one Home Hub inverter. Price shown is a typical installed cost; projects commonly land $7,000-15,000 depending on region and wiring. The caveats owners raise: it's NMC chemistry in an increasingly LFP world, 5kW continuous won't start big HVAC without careful load design, it only works within the SolarEdge ecosystem, and SolarEdge's post-2023 corporate turbulence plus mixed support reviews give some buyers pause. For existing SolarEdge homes though, nothing else integrates as cleanly.
Specifications
Highlights
Pros
- ✓Highest solar-to-storage efficiency via DC coupling (94.5%+)
- ✓Clean single-app monitoring with existing SolarEdge systems
- ✓Stacks to 29.1kWh on a single Home Hub inverter
- ✓Wall or floor mount, NEMA 3R outdoor-rated
- ✓Mid-pack installed pricing for a tier-1 brand
- ✓No separate battery inverter hardware to buy
Cons
- ✗NMC chemistry trails the industry's LFP shift on cycle life and thermal margin
- ✗5kW continuous is the weakest whole-home rating in this group
- ✗Locked to SolarEdge inverters - useless for other ecosystems
- ✗Mixed owner reviews on SolarEdge support responsiveness
- ✗Company financial turbulence raises long-warranty-horizon questions
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Tesla
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FranklinWH
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The Powerwall alternative installers keep steering people toward in 2026, and owner satisfaction scores back them up. One cabinet holds 15kWh - the most storage per unit of any mainstream battery - with 10kW continuous and a 15kW/10-second surge rated to start a 5-ton air conditioner. Price shown is typical installed cost with the aGate controller ($12,000-20,000 depending on market). Because it's AC-coupled, it retrofits onto any existing solar inverter brand - the single biggest reason people pick it over Powerwall 3. The aGate handles whole-home transfer plus generator and even EV-as-load integration. Owner gripes are modest: quotes vary widely between dealers, the app covers essentials but lacks Tesla's polish and power-user data, and the dealer network, while growing fast, is thinner than Tesla's. Expansion runs to a ridiculous 225kWh across 15 units.