The Home Battery ReportIndependent · No installer money

Tesla Powerwall 3 vs FranklinWH aPower 2

A straight, side by side read on specs and warranties, with the honest caveats. Every figure is from the manufacturer datasheet; sources are at the bottom.

Figure - Specs to scalebars vs the largest in our database
Tesla Powerwall 3 versus FranklinWH aPower 2: specs to scaleHorizontal bars comparing usable capacity, continuous power, peak power, warranty for Tesla Powerwall 3 and FranklinWH aPower 2, each scaled against the largest value in the home battery database.Tesla Powerwall 3FranklinWH aPower 2Usable capacity13.5 kWh15 kWhContinuous power11.5 kW10 kWPeak powerNot published15 kWWarranty10 yr15 yr
SpecTesla Powerwall 3FranklinWH aPower 2
ChemistryNot publishedLFP
Usable capacity13.5 kWh15 kWh
Continuous power11.5 kW10 kW
Peak powerNot published15 kW
Round-trip efficiency89%90%
Warranty10 years15 years or 60 MWh throughput, whichever comes first
Backup scopeWhole-home capableWhole-home capable
InverterIntegratedIntegrated

What actually differs

  • More usable capacity: the FranklinWH aPower 2 offers 15 kWh vs 13.5 kWh, so at that size it carries more of your home for longer per charge.
  • More continuous power: the Tesla Powerwall 3 sustains 11.5 kW vs 10 kW, which matters for running big loads like an AC at once.
  • Longer warranty term: the FranklinWH aPower 2 is warranted 15 years vs 10, though always read the throughput or cycle cap too.
  • Efficiency is not apples to apples here: the Tesla Powerwall 3 quotes 89% (solar round trip (solar to battery to home); not a pure AC to AC figure) and the FranklinWH aPower 2 quotes 90% (grid to battery to load (AC round trip)), so do not read the raw numbers as a direct ranking.

Which one pays off is a numbers question.

Neither spec sheet tells you the payback in your home. That comes from your rate plan and incentives.

Run the Worth It calculator →

Powerwall 3 vs aPower 2 FAQ

Is the Tesla Powerwall 3 or the FranklinWH aPower 2 better?

Neither is universally better. The FranklinWH aPower 2 carries more usable capacity (15 kWh vs 13.5 kWh), while the smaller unit can cost less and fit tighter spaces. The right pick depends on your home's loads, backup needs, and budget, not the brand on the box.

What is the difference in usable capacity between the Tesla Powerwall 3 and the FranklinWH aPower 2?

The Tesla Powerwall 3 offers 13.5 kWh and the FranklinWH aPower 2 offers 15 kWh of usable capacity.

Which has more continuous power, the Tesla Powerwall 3 or the FranklinWH aPower 2?

The Tesla Powerwall 3 sustains 11.5 kW continuous vs 10 kW, which matters for running big loads like an air conditioner at once.

Which has the longer warranty, the Tesla Powerwall 3 or the FranklinWH aPower 2?

The FranklinWH aPower 2 is warranted 15 years vs 10 for the Tesla Powerwall 3. Read the throughput or cycle cap too, since that can limit coverage before the year count does.

Is the Tesla Powerwall 3 or the FranklinWH aPower 2 cheaper?

Neither spec sheet tells you the installed cost or the payback in your home. That depends on your electricity rate plan and local incentives, so run the numbers for your address rather than comparing sticker prices.

Sources

Source: Tesla Powerwall 3 datasheet, 2026. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.

Source: FranklinWH aPower 2 datasheet, Dec 2025. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.