Anker SOLIX C1000 Gen 2 Review (2026)

Anker’s SOLIX line has been chasing the “smallest, fastest” crown in the 1kWh class for a couple of generations now, and the C1000 Gen 2 is the version that finally made me stop recommending its predecessor by default. It’s not a bigger battery than before — it’s the same 1,024Wh capacity — but almost everything around that battery got faster, lighter, or better engineered. Here’s what actually changed, and where Anker made a trade-off I think buyers should know about upfront.

Anker SOLIX C1000 Gen 2 Specs at a Glance

Capacity: 1,024Wh (LiFePO4)
Continuous output: 2,000W (up from 1,800W on the original C1000), 3,000W peak
Charging: UltraFast mode claims 0–100% in about 49 minutes from a wall outlet
Weight: roughly 24.9–25 lbs, about 4 lbs lighter than the original
Cycle life: rated to retain 80% capacity after roughly 4,000 cycles
Price: around $449 at list, though it’s frequently discounted

Why the Charging Speed Number Actually Matters

A lot of “fast charging” claims in this category are marginal improvements dressed up as breakthroughs. Anker’s UltraFast mode on the C1000 Gen 2 is a real, noticeable jump — going from empty to full in under an hour could change how you use one of these things day to day. Instead of planning your charging around an overnight window, you can top it off during a lunch break or between errands. That’s the kind of practical improvement that matters more than most spec-sheet bragging rights.

Lighter, But Not Just for the Sake of It

Shaving roughly 4 lbs (about 14%) off the previous generation sounds minor until you’re the one carrying it to a campsite or up a flight of stairs during an outage. Anker achieved this partly through GaN (gallium nitride) power electronics, which run cooler and more efficiently than traditional silicon components. The side benefit of GaN is less heat to dissipate, which generally means less aggressive fan behavior — a detail that matters if you’ve ever been annoyed by a power station’s cooling fan running non-stop.

The Trade-Off: No More Expansion Battery

Here’s the part that doesn’t make it into most marketing pages: to hit this smaller, lighter footprint, Anker removed the expansion port that let the original C1000 double its capacity with an add-on battery. The Gen 2 is a fixed-capacity unit — what you buy is what you get, permanently. If you specifically wanted a 1kWh starter unit with the option to scale up later, that path is closed on this model. It’s a reasonable trade for most buyers who just want a compact, fast-charging unit, but it’s a real limitation if you had expansion plans.

Ports and Everyday Usability

The C1000 Gen 2 spreads its 2,000W across nine total ports, enough to run a genuinely useful mix of devices at once — laptops, a mini-fridge, phones, and small kitchen appliances without constantly unplugging one thing to plug in another. The AC outlets use pure sine wave output, which matters if you’re running sensitive electronics or medical devices like a CPAP machine.

Who Should Buy the C1000 Gen 2

You want the fastest realistic recharge time in the 1kWh class
Weight and portability matter as much as capacity
You don’t need to scale capacity up later with an add-on battery

Who Should Look Elsewhere

If expandability is a priority, look at Anker’s larger SOLIX units or a competing brand that still supports add-on batteries at this capacity tier
If your loads regularly exceed 2,000W continuous, you’ll want to size up rather than push this unit to its limit

My Take

I like what Anker did here more than I expected to. Losing the expansion port is a real trade-off, not a marketing footnote, and I want to be upfront about that rather than glossing over it the way some spec-sheet comparisons do. But for the buyer this unit is actually built for — someone who wants a fast-charging, lightweight, grab-and-go 1kWh station and isn’t planning to scale up later — the C1000 Gen 2 is one of the more genuinely improved second-generation products I’ve looked at in this category recently. It’s not trying to be everything to everyone, and that focus shows.

Frequently Asked Questions

Is the Anker SOLIX C1000 Gen 2 worth upgrading from the original C1000?

If fast charging and lower weight matter to you and you never used the expansion port on the original, yes. If you’re relying on add-on battery capacity, stick with the original C1000 or look at a different expandable platform.

Can the C1000 Gen 2 run a CPAP machine all night?

Yes — a CPAP machine draws a small fraction of the C1000 Gen 2’s 1,024Wh capacity and 2,000W output, so it should comfortably last through the night with plenty of headroom for other devices.

How long does the battery actually last?

Anker rates the LiFePO4 pack to retain about 80% of its original capacity after roughly 4,000 charge cycles, which for most households translates to many years of regular use before you’d notice meaningful degradation.

Anker SOLIX C1000 Gen 2 Review: The Fastest-Charging Power Station of 2026?