Best Home Solar Batteries in 2026: Tesla vs Enphase vs FranklinWH vs SolarEdge

There is no single best battery

Tesla Powerwall 3, Enphase IQ Battery 5P, FranklinWH aPower 2 and SolarEdge Home Battery solve similar problems with different architectures. The strongest choice depends on existing solar equipment, desired backup loads, installation space and how much energy and power the home needs.

A homeowner with an existing Enphase system may value modular AC-coupled expansion, while a new SolarEdge project may benefit from a tightly integrated DC-coupled ecosystem.

Compare energy and power separately

Powerwall 3 is listed at 13.5 kWh nominal energy, Enphase 5P at 5 kWh usable per unit, FranklinWH aPower 2 at 15 kWh and SolarEdge Home Battery at 9.7 kWh usable.

Those figures are only half the comparison. Continuous output ranges widely, and that can determine whether HVAC, pumps or other large loads work during an outage.

Architecture matters

AC-coupled batteries are often flexible for retrofits. DC-coupled systems can reduce conversion steps in integrated new solar projects. Neither architecture is automatically superior for every home.

Ask the installer what equipment must be replaced or added in your actual project.

Use installed-system cost, not battery MSRP

The relevant price includes battery hardware, control equipment, electrical labor, permitting, backup-panel work and any service upgrade or trenching.

Two batteries with similar hardware prices can end up with very different installed totals.

Build a scorecard

Compare usable kWh, continuous and peak kW, chemistry, coupling method, warranty, service network, expansion path, app controls and installed cost. Then score only the factors that matter to your household.

Questions worth asking

• Which system best fits my existing solar equipment?
• Which battery can start my largest backed-up load?
• What is the installed cost per usable kWh?
• What happens if I want more capacity later?