In short
The Jackery HomePower 3600 Pro Max comes out ahead on 2 of six outage scenarios; the EcoFlow DELTA Pro 3 wins 1. They can start the same household loads; the gap is capacity and price.
We may earn a commission if you buy through links on this page, at no extra cost to you. It never changes a result. Specs from each maker, prices checked October 28, 2026; we haven't tested these units.
EcoFlow
4 kWh with 120/240 V; grows to 12 kWh per unit. EcoFlow's Smart Generator can top it up on long outages.
† reported by retailers or reviews, not yet confirmed on EcoFlow's spec sheet.
$2,799list $3,299 · out of stock when checked, October 28, 2026
Check price
Jackery
The cheapest native 120/240 V unit we list, with a 50 A outlet and Jackery's own $399 manual transfer switch: a well pump starts on 4 kW continuous and an 8 kW peak. Jackery quotes up to 43 kWh with extra batteries; we model the unit alone until the pack size is published.
† reported by retailers or reviews, not yet confirmed on Jackery's spec sheet.
$1,799list $2,099, October 28, 2026
Check priceEach starts at 6 p.m., battery only. Extra batteries are added when the maker sells them and the outage needs them.
| Scenario | DELTA Pro 3 | HomePower 3600 Pro Max | Better pick |
|---|---|---|---|
| Fridge, Wi-Fi & lights24 h | 24 h+ | 24 h+ | Tie |
| Storm night + sump pump48 h | 2.0 days+ (+2 batt.) | 20 h | DELTA Pro 3 |
| CPAP + fridge24 h | 24 h+ | 24 h+ | Tie |
| Rural: well pump & freezer72 h | 2.7 days (+2 batt.) | 19 h | HomePower 3600 Pro Max |
| Winter: gas furnace72 h | 21 h (+2 batt.) | 6.1 h | HomePower 3600 Pro Max |
| Hurricane week168 h | Not enough continuous output | Not enough continuous output | Tie |
| Spec | EcoFlow DELTA Pro 3 | Jackery HomePower 3600 Pro Max |
|---|---|---|
| Battery | 4.1 kWh LFP | 3.6 kWh LFP |
| Expandable to | 12 kWh | No |
| Continuous output | 4.0 kW | 4.0 kW |
| Start-up surge | 8.0 kW | 8.0 kW |
| 240 V | Yes | Yes |
| Solar input | 2.6 kW | 1.2 kW |
| Weight | 113.5 lb | 73.85 lb |
| Warranty | 5 years | 5 years |
| Panel connection | Smart Home Panel 2 (installed) | Jackery Manual Transfer Switch ($399) or Smart Transfer Switch |
| Price | $2,799 | $1,799 |
The Jackery HomePower 3600 Pro Max comes out ahead on 2 of six outage scenarios; the EcoFlow DELTA Pro 3 wins 1. Scenario by scenario results are in the table on this page; they come from published specs, not hands-on tests.
The EcoFlow DELTA Pro 3 can, for about 3.4 days on one charge. The Jackery HomePower 3600 Pro Max can, for about 3.0 days on one charge.