Use-case guide · 2026
Sump pumps have the cruelest failure mode in the house: the same storm that floods your basement is the one that kills the power. A generator (or battery backup) for the sump pump routinely pays for itself in one avoided insurance claim.
Running watts
800W (⅓ HP) to 1,050W (½ HP)
Starting surge
1,300–2,200W depending on horsepower
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3,500 running watts starts any residential sump pump with room for the fridge and lights, dual fuel keeps it fed during long storms, and it's the least money that does the whole job.
$549on Amazon
Price as of Aug 4, 12:18 AM ET — subject to change.
Plug the pump into the DELTA Pro with pass-through power and it functions as a giant UPS: the instant utility power drops, the pump keeps running on battery with zero action from you — crucial if the outage starts while you're asleep or away.
$1,599on Amazon
Price as of Aug 4, 12:19 AM ET — subject to change.
Handles the pump plus household essentials at conversation volume, with eco-mode runtimes that cover an all-night storm on one tank.
$849on Amazon
Price as of Aug 4, 12:18 AM ET — subject to change.
Yes — plug the pump into a station that supports pass-through/UPS operation and it switches to battery instantly when the grid drops. A 2–3.6kWh unit typically covers several hours of heavy pumping; pair with a generator for multi-day storms.
At least 2,200W peak capacity for the pump alone; a 3,000–4,500W class unit is the practical choice so the fridge and lights can run alongside it.