The Anker SOLIX X1 is Anker’s modular home battery system. It’s built from a power module plus stackable 5 kWh battery modules, and several systems can run in parallel. This review uses Anker’s US product page and published datasheets. We haven’t tested one ourselves, and specs differ by region, so check the US model your installer quotes.
Anker SOLIX X1 Specs (US Page)
| Spec | Value |
|---|---|
| Battery module | 5 kWh each, LFP |
| Per system | 1 power module + up to 6 batteries (up to 30 kWh) |
| On-grid power | 6 kW (3 kW with one battery module) |
| Backup power | 6.6 kW (3 kW with one module, 6 kW with two) |
| Peak (10 s) | 4.5 kW with one module, 9 kW with two |
| Parallel | Up to 6 systems: 36 kW / 180 kWh |
| AC/heat pump off-grid | Soft starter required (Anker note) |
How many battery modules does the Anker SOLIX X1 hold?
Up to 6 per system (30 kWh), and up to 6 systems can run in parallel for 180 kWh, per Anker.
Does the X1 need a soft starter for air conditioning?
Anker says a soft starter is required for AC and heat pumps when running off-grid.
Is the Anker SOLIX X1 installer-only?
Yes. Get quotes from installers who carry it, and confirm the U.S. model.
Anker SOLIX X1 vs Powerwall 3: which has more power?
Powerwall 3, at up to 11.5 kW per unit versus 6.6 kW backup per X1 system. X1 systems can run in parallel to add power.
Source: Anker SOLIX X1 US product page, Oct 2026. Regional datasheets list other power-module models; Anker SOLIX X1 US product page. Accessed Oct 2026.
What We Like
- Fine-grained capacity: add 5 kWh at a time
- Each battery module has its own energy optimizer, according to Anker, to manage modules independently
- Large maximum size in parallel for big homes
- Slim, stackable wall or floor mounting
Things to Know
- Power per system is modest: 6.6 kW backup means one system can’t run several big 240V loads at once. Use parallel systems for more.
- Soft starters are required for AC and heat pumps when off-grid.
- Full power in heat needs at least three battery modules (Anker note).
- Regional differences: some datasheets are for 230V markets. Confirm US split-phase details.
- Installer-only. Prices vary, and we don’t publish one we can’t verify.
See the X1 on Anker SOLIX’s website.
Anker SOLIX X1 vs Powerwall 3
| Anker SOLIX X1 (one system) | Tesla Powerwall 3 | |
|---|---|---|
| Capacity | 5–30 kWh | 13.5 kWh (+13.5 per Expansion) |
| Continuous / backup | 6.6 kW | Up to 11.5 kW |
| Scaling | 5 kWh steps | 13.5 kWh steps |
| Solar inverter | See regional model | Built in |
Powerwall 3 has more power per unit. The X1 offers finer capacity steps.
Who It’s For
Homes that want lots of storage in small steps, or a large multi-system setup, and can work within about 6.6 kW per system.
Configurations by the Numbers
Using Anker’s US figures (5 kWh per battery module, one power module plus up to 6 batteries per system, up to 6 systems in parallel):
| Setup | Energy | Backup power | Runtime at 1.5 kW average |
|---|---|---|---|
| 1 system, 1 battery | 5 kWh | 3 kW | about 3.3 h |
| 1 system, 2 batteries | 10 kWh | 6 kW | about 6.7 h |
| 1 system, 3 batteries | 15 kWh | 6.6 kW | 10 h |
| 1 system, 6 batteries | 30 kWh | 6.6 kW | 20 h |
| 2 systems, 12 batteries | 60 kWh | about 13 kW | 40 h |
Runtime is energy ÷ load before losses. Power figures are from Anker’s US page; confirm your configuration. Note that power depends on how many battery modules are installed, so one or two modules limit what you can run at once.
Worked Example: Can One System Handle My Loads?
Add up loads that could run together:
| Load | Running watts (example) |
|---|---|
| Refrigerator | 150 |
| Furnace blower | 500 |
| Microwave | 1,200 |
| Well pump | 1,000 |
| Lights and electronics | 300 |
| Total | 3,150 W |
That fits within 6.6 kW backup with room to spare. Adding a 3.5 kW central AC brings it to 6,650 W, right at the limit, before the compressor’s starting surge. Anker notes a soft starter is required for AC and heat pumps off-grid. A home that wants AC on backup would likely use two systems in parallel. See surge watts vs running watts.
Why Capacity Steps Matter
Finer steps let you buy closer to what you need:
| Target | SOLIX X1 (5 kWh steps) | Powerwall 3 (13.5 kWh steps) | aPower 2 (15 kWh steps) |
|---|---|---|---|
| 10 kWh | 10 kWh | 13.5 kWh | 15 kWh |
| 20 kWh | 20 kWh | 27 kWh | 30 kWh |
| 35 kWh | 35 kWh (2 systems) | 40.5 kWh | 45 kWh |
Paying for capacity you won’t use adds cost. But a bigger battery also gives more margin for long outages. For other brands, see Powerwall 3 vs Enphase vs FranklinWH.
Placement and Code
Like other home batteries, the X1 has to follow NEC Article 706, NFPA 855 and local fire codes, which control where storage can go and how much can be grouped together. Stacked systems take less wall width but need floor or wall support for the full stack’s weight. Your installer and inspector confirm the location.
Step-by-Step: Planning an X1 System
- Find your daily kWh and evening-peak kWh from your utility data.
- List backup loads and simultaneous watts, including motor surges.
- Choose battery modules: target kWh ÷ 5.
- Check power: one system gives up to 6.6 kW backup. Add parallel systems for more.
- If backing up AC or a heat pump, plan a soft starter.
- In hot locations, plan at least three battery modules for full power, per Anker’s note.
- Get installer quotes for the U.S. split-phase model.
How It Fits a Solar Home
Ask your installer whether the U.S. X1 configuration connects to solar on the DC side, the AC side, or both, since regional models differ. If you already have solar, check compatibility with your existing inverter. For background, see grid-tie vs hybrid vs off-grid solar and microinverters vs string inverters.
Bill Savings Example
Under net billing, a 15 kWh X1 cycling about 12 kWh a day (illustrative) at 90% round-trip efficiency, with an $0.08 export credit and $0.40 evening rate, is worth 12 × 0.9 × $0.40 − 12 × $0.08 = $3.36 a day, or roughly $1,230 a year. Check Anker’s datasheet for the actual efficiency. Under flat-rate net metering, the same battery adds mostly backup value. See is a solar battery worth it.
FAQ
How much does the Anker SOLIX X1 cost?
Installer quotes vary by configuration. Get several. No 25D credit applies to homeowner-owned systems installed after 2025.
Can the X1 power central AC?
With enough modules and a soft starter, possibly. Check your AC’s LRA with the installer.
How many systems can run together?
Up to six, for 36 kW and 180 kWh, according to Anker.
Sources: Anker SOLIX, X1 Energy Storage System US page; Anker SOLIX X1 datasheets and user guides; Tesla Powerwall 3 Datasheet (US). Accessed Oct 2026.
Related: Anker SOLIX F3800 vs Jackery Explorer 3000 Pro, Anker SOLIX C200 DC Review