These are systems you can order without waiting on an installer. Photos are manufacturer packshots. Prices are brand-site snapshots dated beside each product (the $1,899 DELTA Pro 3 extra-pack figure is undated). The three flagships sit below; cheaper rungs in the same catalogs are on the lineup pages.
Fridge, CPAP, router. Not a well-pump machine. Buy the $389 extra pack before a second brand.
Anker’s page is unambiguous: 3.84 kWh, 6 kW continuous, 9 kW surge claim, LFP, 5-year warranty, 120/240 V. Energy is the limit, not watts. Add a BP3800 if nights run long.
4 kW / 4 kWh starting point with a clearer extra-battery and panel path. Buy this if you expect to stack EcoFlow accessories, not if you need 6 kW today.
EP900 is the 9 kW inverter. Each B500 is 4,960 Wh nominal / 4,464 Wh usable (Bluetti). Two packs ≈ 9.9 kWh. Off-grid output drops to 7.6 kW with only two B500s — that is their note, not ours.
Swipe or use arrows for more official angles. Specs are from brand US pages, not a lab.
Corded: fridge, CPAP, router, lamps, a window AC if watts allow. That is a real backup. Automatic whole-house is a different SKU (Ultra X + SHP3, Powerwall, EP900 + a panel). Amazon is a fallback if a brand site is sold out.
Match a portable to your loads, then check multi-day fuel vs battery.
Find my backup Runtime calculator 2026 rankings Cost guide Generator vs battery