FranklinWH aPower 2 vs Anker SOLIX X1
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.
| Spec | FranklinWH aPower 2 | Anker SOLIX X1 |
|---|---|---|
| Chemistry | LFP | LFP |
| Usable capacity | 15 kWh | 10, 15, or 20 kWh nominal per module (usable not published) |
| Continuous power | 10 kW | 6 kW |
| Peak power | 15 kW | 12 kW |
| Round-trip efficiency | 90% | 90.2% |
| Warranty | 15 years or 60 MWh throughput, whichever comes first | 10 years limited |
| Backup scope | Whole-home capable | Whole-home capable |
| Inverter | Integrated | Integrated |
What actually differs
- More continuous power: the FranklinWH aPower 2 sustains 10 kW vs 6 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 FranklinWH aPower 2 quotes 90% (grid to battery to load (AC round trip)) and the Anker SOLIX X1 quotes 90.2% (AC to battery to AC at 77F), 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 →aPower 2 vs SOLIX X1 FAQ
Is the FranklinWH aPower 2 or the Anker SOLIX X1 better?
Neither is universally better. The FranklinWH aPower 2 delivers more continuous power (10 kW vs 6 kW). The right pick depends on your home's loads, backup needs, and budget, not the brand on the box.
Which has more continuous power, the FranklinWH aPower 2 or the Anker SOLIX X1?
The FranklinWH aPower 2 sustains 10 kW continuous vs 6 kW, which matters for running big loads like an air conditioner at once.
Which has the longer warranty, the FranklinWH aPower 2 or the Anker SOLIX X1?
The FranklinWH aPower 2 is warranted 15 years vs 10 for the Anker SOLIX X1. Read the throughput or cycle cap too, since that can limit coverage before the year count does.
Is the FranklinWH aPower 2 or the Anker SOLIX X1 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: 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.
Source: Anker SOLIX X1 AC-coupled datasheet (US), rev 2025-03. Specs verified 2026-07-01. Figures are per single unit at beginning of life; confirm the current datasheet with your installer.