Anker Solix F3800 Portable Power Station.

If you want portable power that can realistically play in the “whole home backup” space, the Anker Solix F3800 is the one I’d point you to. It delivers up to 6,000 running watts (9,000 surge), offers 120/240V output, and can expand massively for longer outages or heavier loads.

Pros

+Up to 6,000 running watts and 9,000 surge watts
+120/240V NEMA 14-50 outlet for sub-panel connection
+NEMA L14-30 outlet to directly power an RV
+Fast recharge from 15% to full in under about 2.5 hours
+Expandable storage up to 26,880Wh (base system)

Cons

-Larger and heavier than other models in the lineup
-Best benefits require expansion batteries (added cost)

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Anker Solix F3800 Portable Power Station.

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Highlights

+Up to 6,000 running watts and 9,000 surge watts
+120/240V NEMA 14-50 outlet for sub-panel connection
+NEMA L14-30 outlet to directly power an RV

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