On this pageSpecs Expandable / growth-path backup Always-on computing UPS (desktop, NAS, home lab)Mobile / recharge-on-the-go (van life, vehicle, frequent carry)Essentials outage backup (best value)Camping with CPAP, sleeping nearby

Anker SOLIX C1000vsSOLIX C1000 Gen 2 (2026)

Two 1kWh-class Anker stations — same category, different trade-offs. The Gen 2 is newer, but newer doesn’t mean it wins your scenario. The single fact that decides most buyers: Gen 2 cannot expand, Gen 1 can. Everything else is a trade between recharge speed and weight (Gen 2) versus price and value (Gen 1), with one axis — UPS switchover — where Gen 1 actively fails a use case Gen 2 passes.

Anker SOLIX C1000 (Gen 1)

$429.99 ($0.41/Wh)

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Prices and availability change frequently

Anker SOLIX C1000 Gen 2

$500 ($0.49/Wh)

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Prices and availability change frequently

Spec	Anker SOLIX C1000 (Gen 1)	Anker SOLIX C1000 Gen 2
Capacity	1,056 Wh	1,024 Wh
Chemistry	LiFePO4	LiFePO4
Output (rated / surge)	1,800 W / 2,400 W	2,000 W / 3,000 W
Weight	28.44 lbs	24.9 lbs
AC recharge (spec / measured)	0.97 hr spec (~54 min measured, 1,300 W input)	0.82 hr spec (~46–47 min measured, 1,600 W input)
Solar max (mfr / real-world)	600 W max (mfr 1.8 hr; ~3–4 hr real-world per our review)	600 W max (mfr 1.8 hr; ~5–6 hr real-world with typical 200 W panel per our review)
Ports	11 total — 6× AC, 1× USB-C 100 W, 1× USB-C 30 W, 2× USB-A 12 W, 1× 12 V car 120 W	10 total — incl. 1× USB-C 140 W, 1× 12 V car 120 W
UPS switchover	20 ms	10 ms
Expandable	Yes, to 2,112 Wh (BP1000)	No (fixed 1,024 Wh)
Light bar	Integrated 3-level LED + SOS	None (removed)
Display		LCD screen
Warranty	5 years	5 years
Price	$429.99 ($0.41/Wh)	$500 ($0.49/Wh)

Blank cells indicate figures not recorded in our research, not that the feature is absent.

Expandable / growth-path backup

For buyers who are fine with ~1 kWh today but want the option to bolt on more later — push a fridge-plus-freezer past 24 hours, or scale backup as needs grow. Load: mixed essentials, ~150–400 W, AC port.
Expandable to 2,112 Wh via the BP1000; our review confirms the expansion battery roughly doubles base capacity. Gen 1’s own review and FAQ name this as the explicit reason to choose it over Gen 2 — multiple owners bought BP1000 batteries expecting them to fit Gen 2 and were stuck.
Cheaper base unit ($429.99 vs $500) and more nameplate capacity (1,056 vs 1,024 Wh). Usable capacity ≈ 900–950 Wh at this ~150–400 W mixed essentials load, AC port (our review: 85–90% at the wall across bench tests at this regime).
Gen 2 is disqualified by a hard physical gate, not demoted on performance — it physically cannot expand; the expansion-battery port was removed entirely.
One expansion battery quirk to set expectations: the BP1000 charges only through the C1000, not directly from AC, and charges slowly. For distributed coverage rather than longer single-load runtime, a second standalone unit can beat the expansion battery.

Always-on computing UPS (desktop, NAS, home lab)

For buyers backing up a desktop tower, NAS, or networked gear that cannot tolerate a reboot during the grid-to-battery cutover. Load: ~200–500 W continuous, AC port.
10 ms switchover, review-confirmed across desktops, NAS, and networking. Passthrough plus fast switchover make it a multi-day replacement for a 30-minute lead-acid UPS, per our review.
Usable capacity ≈ 850–900 Wh at this ~200–500 W computing load, AC port (our review: 850–907 Wh / 83–89% at ~1 kW). Plenty to bridge typical outages for the gear above.
Gen 1’s 20 ms switchover is review-documented to let desktop PCs and networked 3D printers briefly lose power during cutover, while Gen 2’s sub-10 ms is bench-confirmed and owner-confirmed to ride desktops, NAS, routers, and PoE switches through outages without a reboot. Gen 1 bridges consumer electronics cleanly — routers, modems, CPAP — but our review explicitly rules it out for desktops and 3D printers.
Gen 2 firmware caveat: updates shut the outputs off mid-process — schedule them deliberately for always-on gear.

Mobile / recharge-on-the-go (van life, vehicle, frequent carry)

For buyers who move the unit constantly and top it off in short windows — a library, a coffee stop, a small generator — rather than overnight. Load: intermittent device plus fridge loads on the move; the operative variables are carry weight and recharge speed, not runtime.
24.9 lbs vs 28.44 lbs — ~3.5 lbs lighter, the lightest 1kWh-class unit in our review’s bench set, genuinely one-hand liftable. ~46–47 min measured full recharge (1,600 W input) vs Gen 1’s ~54 min measured — dead-to-full is a coffee break. Higher 2,000 W output gives more headroom for vehicle-side appliances.
Gen 1 is still fast (~54 min) and cheaper, but the 3.5 lb and recharge-speed gaps both favor Gen 2 in a carry-often life, and the light bar Gen 1 adds is redundant in a van.
Fast-charge temperature caveat, slightly worse on Gen 2: fast charging needs cell temp above 68 °F and slows in cold; one owner saw solar charging stall at 41 °F. Plan recharge around temperature in winter. Vehicle 12 V charging caps near 100 W (~12 hr) on both — pair the Anker Alternator Charger for practical drive-charging.

Essentials outage backup (best value)

For buyers scoped to essentials — fridge, internet, a few lights, phone charging, maybe a CPAP — through a multi-hour outage, who want the soundest pick for the least money and are not protecting a desktop. Load: ~150–300 W mixed essentials, AC port (fridge cycling plus router plus lights), with CPAP optionally on DC or USB-C.
$429.99 vs $500, and better $0.41/Wh vs $0.49/Wh — cheaper to acquire and cheaper per stored watt-hour. More nameplate capacity (1,056 vs 1,024 Wh) and the integrated light bar with SOS mode — a real plus in an outage. Optional headroom: the expansion battery path is there if a future need stretches past a single fridge for 24+ hours.
Usable capacity ≈ 900–950 Wh at this ~150–300 W essentials load, AC port (our review: 85–90% at the wall) — meets or slightly beats Gen 2 at this regime.
Gen 2 is a runner-up — pick it instead only if you’ll also protect a desktop (10 ms) or want the faster recharge for generator top-offs during a long event. You pay ~$70 more for capabilities this scenario doesn’t otherwise need.
Gen 1 trap to neutralize for this segment: the 12 V DC port auto-shuts after ~1 hr of sub-10 W draw — owners lost food when a small 12 V fridge cycled off overnight. If you run a low-draw DC fridge overnight, defeat the power-save toggles first, or run that fridge on AC. Our Gen 2 review is silent on this behavior (silence is not a pass — treat as unverified for Gen 2).

Camping with CPAP, sleeping nearby

For car-campers and basecampers who keep the unit near the tent, run a CPAP overnight, and want a campsite light — vehicle is within reach, so a few pounds don’t decide it. Load: CPAP ~40 W (run on DC or USB-C direct, bypassing the inverter), plus lights and device charging.
Integrated 3-level LED plus SOS light bar — genuinely useful at a campsite; Gen 2 removed it. Cheaper ($429.99) and expandable for a long weekend with a cooler. CPAP usable runtime ≈ multi-night at ~40 W on the DC or USB-C port (our review: 3–4 nights humidifier-off via DC). Runtime stated on DC because the inverter idle tax that crushes a ~40 W AC load does not apply here.
Gen 2 is the pick only if you backpack it any distance: 3.5 lbs lighter and a 140 W USB-C that charges a laptop faster. Its quiet-at-CPAP behavior matches Gen 1, so it doesn’t win on the sleep load itself.
Setup gotcha on both units: complete the initial Bluetooth and app pairing at home — off-grid, the outlets may not turn on until paired.

True of both units — Both units ship with SurgePad that cannot be disabled and both trip on high-startup-surge motor and compressor loads (table saw, some microwaves). Both struggle to reach the 600 W solar ceiling without 29–60 V panels; expect ~200 W from a typical panel. Both carry Anker’s split support and returns reputation; both are near-silent below 200 W and loud during fast charging.

The bottom line

Gen 1 wins expandable backup (the only option with a battery port), essentials outage backup (best value at $0.41/Wh plus the integrated light bar), and camping with CPAP nearby (light bar and price; CPAP runtime itself ties). Gen 2 wins always-on computing UPS (10 ms switchover review-confirmed for desktops and NAS, where Gen 1’s 20 ms is review-vetoed) and mobile or recharge-on-the-go (24.9 lbs and ~46–47 min full recharge beat Gen 1’s weight and speed). Read every segment pick as the same hardware seen through a different weighted axis at a different load regime — not a contradiction. What does not separate them: both are LiFePO4 with a 5-year warranty; both are 1kWh-class and explicitly not whole-home; usable capacity at any matched mid load lands ~850–950 Wh for both, so usable capacity does not decide between these siblings. The deciding axes are expandability, UPS switchover, weight, recharge speed, light bar, and price.

Read the full Anker SOLIX C1000 (Gen 1) review Read the full Anker SOLIX C1000 Gen 2 review