Anker SOLIX C800 vs Bluetti AC70: the C800 has more surge headroom

Specifications checked against manufacturer pages on 2026-08-24. No affiliate links on this page yet; we add them only for products we can link directly.

The Anker SOLIX C800 (768 Wh, 1,200 W) and the Bluetti AC70 (768 Wh, 1,000 W), compared on the figures their makers publish. On the normalized ratios, the C800 has more surge headroom (1.60× vs 1.50×).

Specifications, side by side

Numbered notes below the table give the source location or a caveat for figures that need one; check marks mark the better figure where one can be judged; “Manufacturer does not state” means absent from that maker’s page as of its check date listed under Sources. UPS switchover is how long the outlets go dark when grid power drops.

^* Calculated: rated capacity × an assumed 85–90% conversion efficiency; no maker publishes a usable figure.

Notes on the figures

1. C800, rated capacity: Rated capacity as stated by the manufacturer.
2. AC70, rated capacity: Rated capacity as listed in the manufacturer’s battery specifications.
3. C800, continuous output: Continuous AC output at 120 V.
4. AC70, continuous output: Rated continuous output; both AC outlets share this 1,000 W total.
5. C800, surge: Conventional surge rating; the page separately markets a boost mode of 1,600 W for resistive loads. The maker’s FAQ says that boost mode works best with heat-generating devices and does not support precision instruments or devices with strict voltage requirements.
6. AC70, surge: Conventional surge rating; the page separately markets a Power Lifting boost mode of 2,000 W for resistive loads, and its FAQ warns that motor and compressor loads can surge 2-4 times their rated power.
7. C800, full recharge: Full recharge time with UltraFast mode activated in the Anker app, drawing 1,100 W from the wall.
8. AC70, full recharge: Converted from the stated 1.3-1.6 hours in 950 W Turbo Charging mode; the page also advertises 0-80% in 45 minutes, and its FAQ says a full charge takes about 1.5 hours.
9. C800, cell chemistry: Lithium iron phosphate (LFP) cells.
10. AC70, cell chemistry: Lithium iron phosphate chemistry as stated in the battery specifications.
11. C800, cycle life: Stated as 3,000+ cycles, so the figure is a lower bound.
12. C800, cycle life: Remaining capacity after the stated cycle count, from the same specification entry as the cycle figure.
13. AC70, cycle life: Stated as 3,000 or more cycles before capacity falls to 80% of original.
14. AC70, cycle life: Capacity-retention threshold from the same specification line as the cycle count.
15. C800, UPS switchover: The maker’s C800-series page describes the switchover as under 20 ms. Upper bound.
16. AC70, UPS switchover: Upper bound. The page describes the switchover as seamless UPS in 20 ms.
17. AC70, expandable: Expansion works in Power Bank Mode with the B80 (806 Wh), B230 (2,048 Wh), or B300 (3,072 Wh) expansion batteries.
18. C800, solar input: Maximum solar input; the specification list adds an input window of 11-60 V at 10 A. The 2.3-hour figure is to 80%, not to full.
19. AC70, solar input: Maximum solar input; the panel’s open-circuit voltage must fall within 12-58 VDC at up to 10 A.
20. C800, AC input: Maximum wall-charging draw, reached with UltraFast mode activated in the Anker app.
21. AC70, AC input: Maximum wall input, reached in Turbo Charging mode enabled through the BLUETTI App; one marketing bullet on the same page says 850 W Turbo Charging, but the specification table and FAQ both state 950 W.
22. C800, AC outlets: The receptacle type is printed as NEMA 6-20 on the specification list even though AC output is stated as 120 V; the standard 120 V household receptacle is designated NEMA 5-20.
23. AC70, AC outlets: Two 120 V outlets sharing 1,000 W of total output.
24. C800, USB-C: The stronger of the two USB-C ports; the second port tops out at 30 W. The maker’s FAQ states the USB-C ports are output only.
25. AC70, USB-C: Two USB-C ports, each rated up to 100 W.
26. C800, app: The app connects over Wi-Fi or Bluetooth.
27. AC70, app: App control works over Bluetooth via the BLUETTI App; the specification table also lists ‘Mobile APP: Yes’.
28. AC70, noise: Applies to the silent AC charging mode only; the page does not state noise levels for the other charging modes or for discharging.
29. C800, warranty: The specification list also states the warranty as 5 Years. The figure appears on the maker’s certified refurbished listing, the only page where this model is still sold.
30. AC70, warranty: As listed in the specification table; the page also advertises a 90-day express replacement service.
31. C800, weight: Net weight of the power station itself.
32. AC70, weight: Approximate figure; the manufacturer states it as ‘About 22.5 lbs’.
33. AC70, price: Price shown for the standalone unit with no separate list or sale price displayed; the product was listed as out of stock with an expected restock in early September.

The same specs, normalized

Ratios, so the bigger unit does not win by default.

Definitions and direction of each ratio: How we verify.

What each one runs, for how long

Calculated, not measured: hours = rated Wh × efficiency ÷ (appliance W × duty); assumptions on How we verify. “Unlikely to start”: start-up surge exceeds the stated surge rating.

What the differences mean

Surge headroom. The C800’s stated 1,920 W surge is 1.60× its 1,200 W continuous rating, against 1.50× for the AC70 (1,500 W over 1,000 W). Headroom is what starts a compressor or a pump; see the refrigerator and sump rows in the runtime table.

Which one, and for whom

On normalized measures the C800 leads on surge headroom (1.60× vs 1.50×). The AC70 does not lead on any decided measure. Which figure settles it depends on what you need to keep running:

• CPAP overnight. Switchover: C800 up to 20 ms, AC70 up to 20 ms. A 40 W CPAP runs roughly 13–16 hr on the C800 and 13–16 hr on the AC70. Both makers state a 20 ms upper bound, so for one night’s CPAP the deciding figures are price and solar input.
• Keeping a refrigerator cold. Check start-up before runtime. The C800 states a 1,920 W surge rating; the AC70 states a 1,500 W surge rating. A full-size refrigerator needs about 900 W to start.
• A multi-day outage with a generator or solar to recharge from. Full recharge: C800 58 min, AC70 a stated 78–96 min range. The faster unit spends less generator fuel per charge.

Related reading

A 768 Wh battery cannot do what a gasoline generator does — neither unit’s continuous rating covers a 1,500 W space heater (see the runtime table) — but it also cannot poison a household. The safety half of that trade-off is in our CPSC revision matrix of generator carbon-monoxide death counts, and this page puts every verified unit on the same refrigerator scenario.

Other comparisons with these models

• Anker SOLIX C1000 vs Anker SOLIX C800
• Anker SOLIX C800 vs EcoFlow RIVER 2 Pro
• Bluetti AC70 vs Jackery Explorer 1000 v2
• Bluetti AC70 vs EcoFlow RIVER 2 Pro

Sources and method

• Anker SOLIX C800: manufacturer product page, checked 2026-08-24.
• Bluetti AC70: manufacturer product page, checked 2026-08-24.

Published specifications only; no bench tests. Method: How we verify. More: Comparisons.