Anker Solix C1000 vs EcoFlow Delta 2: 1kWh Duel

The 1kWh class, settled (mostly)

Few rivalries in portable power are as close as this one. The Anker Solix C1000 (1056Wh, 1800W) and the EcoFlow Delta 2 (1024Wh, 1800W) are both LiFePO4, both 3000-cycle, both 5-year-warranty, both ~28 lbs, and both frequently on sale in the $350–$600 range. The differences are in the details: the Anker charges faster and takes more solar; the EcoFlow expands further and costs less on deep discount. This is a research-based comparison from official specs and owner feedback — we did not bench-test either unit. (Note: Anker has since released the C1000 Gen 2 with 2000W output; this compares the original C1000.)

The bottom line up front: you can't lose here — both are 1800W/1kWh LiFePO4 with 3000-cycle batteries and 5-year warranties. The Anker Solix C1000 wins on charging speed (58-minute full recharge) and solar input (600W). The EcoFlow Delta 2 wins on expansion ceiling (3040Wh vs 2112Wh) and deep-sale pricing (as low as ~$350). Pick by whichever is cheaper the week you buy, unless fast recharging is your priority.

Side-by-side specs (verified)

Spec	Anker Solix C1000	EcoFlow Delta 2
Capacity	1056Wh (LiFePO4)	1024Wh (LiFePO4)
AC output	1800W (2400W SurgePad)	1800W (2700W surge, 2200W X-Boost)
AC outlets	6×	6×
Cycle life	3000 cycles to 80%	3000 cycles to 80%+
AC recharge	80% in 43 min / 100% in 58 min (UltraFast)	80% in ~50 min / 100% in ~80 min (X-Stream)
Solar input	600W max (11–60V MPPT)	500W max (11–60V, 15A)
UPS	<20ms	EPS (fast switchover)
USB	USB-C 100W + 30W, 2× USB-A 12W	2× USB-C 100W, 2× USB-A 12W + 2× 18W
Expandable	Yes — to 2112Wh (BP1000 battery)	Yes — to 3040Wh (extra batteries)
Extras	Light bar, smart app	EcoFlow app, 15 outlets total
Weight	28.44 lbs (12.9 kg)	27 lbs (12 kg)
Warranty	5 years	5 years
Typical sale price (Oct 2026)	~$470	~$350–$600 on sale

Specs from Anker's and EcoFlow's official product pages; prices observed October 2026 and subject to change.

Head-to-head

Capacity and output: tie

1056Wh vs 1024Wh and 1800W vs 1800W — functionally identical. Both run a fridge 7–14 hours, a 40W CPAP ~17 hours, and a 12V car fridge 16–32 hours. Surge handling differs slightly (Anker's 2400W SurgePad vs EcoFlow's 2700W surge / 2200W X-Boost), but both cover 99% of household appliances.

Charging speed: C1000 wins

Anker's UltraFast mode does 0–100% in 58 minutes — the fastest full recharge in the 1kWh class — versus ~80 minutes for the Delta 2's X-Stream. The 80% marks are closer (43 vs ~50 min), but if you top off frequently, the Anker's pace is noticeable.

Solar: C1000 wins

600W vs 500W max solar input. Neither is a solar monster, but the Anker refills ~20% faster from the sun — about 1.8 hours with a full 600W array in ideal conditions vs ~3 hours for the Delta 2.

Expandability: Delta 2 wins

The Delta 2 scales to 3040Wh with EcoFlow's extra batteries; the C1000 tops out at 2112Wh with the BP1000. If you might outgrow 1kWh, the EcoFlow's ceiling is 50% higher.

Ports and extras: slight edge Delta 2

Both have 6 AC outlets and 100W USB-C. The Delta 2 packs 15 total outlets (including DC5521 barrel ports and a 126W car port); the Anker counters with a handy built-in light bar — genuinely useful at a campsite.

Portability: tie

27 vs 28.4 lbs — both are one-hand carries for short distances and car-camping-friendly. Neither is a backpacking unit.

Price: Delta 2 wins on deep sales

The C1000 sat around $470 in October 2026 sales; the Delta 2 has dipped as low as ~$350 during 2026 promotions (typically $350–$600). At list-ish prices they're close; on a deep Delta 2 sale, the EcoFlow is the value pick.

Winner by use case

• Fastest daily recharge → Solix C1000. 58-minute full charge is class-leading.
• Biggest expansion headroom → Delta 2. 3040Wh max vs 2112Wh.
• Solar-first camping → Solix C1000. 600W input + light bar.
• Maximum outlets/devices → Delta 2. 15 total ports.
• Lowest price on sale → Delta 2. Watch for sub-$400 deals.
• Set-and-forget home backup → either. Both have UPS/EPS modes and 5-year warranties.

Verdict

You can't go wrong here — these are the two best 1kWh stations ever made, and the "loser" is excellent. Buy the Anker Solix C1000 if charging speed and solar matter most: 58-minute full recharges and 600W solar are genuinely best-in-class. Buy the EcoFlow Delta 2 if you want the bigger expansion ceiling (3040Wh), more ports, or the lowest sale price — it regularly dips toward $350. Either way, you're getting 1kWh of decade-grade LiFePO4 with a 5-year warranty for well under $600.

FAQ

Which is better, Solix C1000 or Delta 2?

The C1000 charges faster (58 min full) and takes more solar (600W); the Delta 2 expands further (3040Wh) and goes cheaper on sale (~$350). For most buyers it's a toss-up decided by the current sale price.

Can either power a refrigerator?

Yes, both. Their 1800W inverters start any household fridge; expect roughly 7–14 hours of runtime depending on the fridge's duty cycle.

How fast do they charge?

C1000: 80% in 43 min, 100% in 58 min (UltraFast mode). Delta 2: 80% in ~50 min, 100% in ~80 min (X-Stream).

Should I get the C1000 Gen 2 instead?

The Gen 2 bumps output to 2000W with 1024Wh at a similar price (~$500 on sale). If you need the extra 200W of headroom, it's worth considering — but the original C1000's deeper discounts often make it the better value.