Can the Bluetti AC180 run a 1/3 hp sump pump?

Why the answer is "unclear"

Franklin Electric's spec sheet for the FBSE33 lists 400 W running (4.3 A at 115 V), only 22 % of the AC180's 1,800 W continuous rating. The motor start is the problem. The pump needs about 1,600 W for a fraction of a second, and Bluetti publishes no peak rating that applies to motor loads: its spec table gives "Surge Power: 2700W", but the same page attaches that number to Power Lifting mode for resistive heating loads, and Bluetti's FAQ says not to run motor appliances in that mode. The site therefore does not use the 2,700 W figure as a motor-start limit, and the verdict is "Unclear": the continuous rating is enough, the start cannot be checked from the maker's page. The 1,600 W itself also deserves a caveat: Franklin publishes no locked-rotor figure for this pump, so it is the upper end of the range on Champion's generator wattage chart. Bluetti's spec table gives "Surge Power: 2700W", which is also the figure it quotes for Power Lifting mode, a mode for resistive heating loads (see the AC180 page). Neither side states how long a start can be held, either.

Hours of pumping, not hours of clock

Bluetti prints its own formula: capacity × depth of discharge (90 %) × efficiency (85 %) ÷ load, so the factor is 0.765:

hours = 1,152 Wh × 0.765 ÷ 400 W ≈ 2.2 h of motor running time.

Bluetti's formula also adds about 15 W of self-consumption to the load, which the site's arithmetic leaves out, so real runtime is a little shorter. A sump pump runs only when the float rises, so how long a charge lasts on the calendar depends on how fast water comes in. Divide 881 Wh by 400 W × the pump's daily running hours. If it runs one hour in total per day, that is about two days. In a heavy storm the pump can run almost constantly, and then 2.2 h is the figure to plan around.

What else changes it

Other loads draw from the same 881 Wh. A top-freezer fridge on the same station adds 360 W running, and the combined peak (one motor starting while the other runs) comes to about 1,960 W, still inside the ratings. Bluetti lists discharge from −4 to 104 °F, with output limited to 1,500 W between 86 and 104 °F, which does not affect a 400 W pump. Bluetti rates the cells for 3,500 cycles to 80 % of original capacity.

Recharging

With Turbo charging enabled in the app, Bluetti gives 1,440 W of AC input and about 1.3 to 1.8 h to full; standard AC input is 1,000 W. Solar input is up to 500 W. During the kind of storm that fills a sump pit, solar output is usually low, so plan around wall recharging or extra capacity. Bluetti lists B80, B230 and B300 batteries for the AC180, up to 4,224 Wh in total. On 2026-10-31 Bluetti's page showed the AC180 out of stock.

Alternatives

If you want a station whose maker publishes a motor-start rating above the pump's 1,600 W, the EcoFlow DELTA 3 (1,800 W continuous, 3,600 W surge) and the Anker SOLIX C1000 Gen 2 (2,000 W, 3,000 W) are the same size class with stated surge figures. For more pumping time per charge, the Jackery Explorer 2000 v2 gives about 4.3 h with this 1/3 hp pump on the site's default factor.