Same chemistry class (all LFP). Completely different products. A 3.84 kWh portable is not a 13.5 kWh wall appliance with a gateway.
| Powerwall 3 | EcoFlow Ultra X | Anker F3800 Plus | BLUETTI EP900 | |
|---|---|---|---|---|
| Role | Installed whole-home | Orderable whole-home stack | High-output portable | High-output inverter + modules |
| Energy (base) | 13.5 kWh | 12 kWh (2 packs) | 3.84 kWh | ~9.9 kWh (2× B500) |
| Continuous W | 11.5 kW | 12 kW | 6 kW | 9 kW |
| Motor start (published) | 185 LRA | Mfr. surge claim up to 45 kW | Not published as LRA | High; confirm kit |
| Chemistry | LFP | LFP | LFP | LFP |
| Switchover | Seamless (Tesla gateway) | <20 ms with SHP3 | Manual / transfer kit | Depends on panel kit |
| Buy path | Tesla / certified installer | EcoFlow.com | Anker SOLIX / Amazon | Bluetti / Amazon |
| How you buy it | Installer quote | Brand site | Brand site or Amazon | Brand site or Amazon |
| Price snapshot | Installed bid / quote only | $7,999–$14,399 list bundles (checked 19 October 2026) | $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026) | Confirm live kit |
6 kW / 3.84 kWh portable. First buy if you need watts this month.
4 kW / 4 kWh. Fewer watts, clearer EcoFlow accessory path.
12 kW / 12 kWh starter. SHP3 is the automatic-panel add-on.
9 kW inverter plus 4.96 kWh modules.
Powerwall 3 wins if you want one wall unit, Tesla app / Storm Watch, and you will pay installer pricing. 185 LRA is a concrete motor-start number, which most portables do not publish.
Ultra X wins if you want Powerwall-class watts and you want to order the hardware from EcoFlow, optionally with their install program. Warranty on the current US page is 5 years — shorter than Tesla’s 10. That is a real trade, not a footnote.
OCEAN Pro is not on this table. It is EcoFlow’s certified-installer on-grid system (Get a Quote), compared separately with Powerwall 3 in OCEAN Pro vs Powerwall 3.
F3800 Plus wins as the first purchase: 6 kW, 240 V, $2,399.99 Halloween sale / $2,999.99 list (checked 26 Oct 2026, sale ends 1 Nov 2026), sit-on-the-floor, returnable. Energy runs out fast (3.84 kWh is about 2–3 hours at 1.5 kW).
EP900 wins when 9 kW continuous matters more than polish — wells, shops, frequent cycling — and you will stack B500s.
Start with the cart product that matches watts, then add batteries. Do not start with Tesla if you need hardware in the garage next week.