Backup Rank

BLUETTI Apex 300 vs EcoFlow DELTA 3 Ultra

BLUETTI Apex 300 vs EcoFlow DELTA 3 Ultra: two home backup power stations compared on output, solar input, expansion, voltage, weight and price.

Where each one wins

Worked out from the specs and prices below.

Side by side

Rows that differ are marked.

SpecApex 300DELTA 3 Ultra
Lowest price$1,499$1,299
Battery capacity2,764.8 Wh3,072 Wh
AC output3,840 W3,600 W
Surge outputNot listed7,200 W
Max with extra batteriesNot listed3,072 Wh
Battery typeLiFePO4LiFePO4
Cycle life6,000 cyclesNot listed
AC voltage120V and 240V120V only
Max solar input2,400 W800 W
Wall charging3,840 WNot listed
UPS switchoverNot listed10 ms
AC outlets6Not listed
Home panel or transfer switchYesYes
Weight83.8 lb72.1 lb
Warranty5 years3 years

Where both rank

Place and score in each best list that ranks both. Scores compare models within one list.

ListApex 300DELTA 3 UltraModels ranked
Best Power Stations for Solar#10 (score 48)#21 (score 39)54
Best Lightweight Power Stations#47 (score 56)#16 (score 69)57
Best Power Stations for a Refrigerator#15 (score 65)#17 (score 64)50
Best Power Stations for a Well Pump#13 (score 65)#15 (score 64)36
Best Power Stations for a Space Heater#15 (score 65)#17 (score 64)48
Best Power Stations for a Furnace#15 (score 65)#17 (score 64)50

What actually separates them

Both connect to a home panel or transfer switch. The BLUETTI Apex 300 is the more powerful system, and the EcoFlow DELTA 3 Ultra is the bigger single battery with the lower price. As of November 8, 2026, the Apex 300 costs $1,499 and the DELTA 3 Ultra costs $1,299.

The Apex 300 stores 2,764.8 Wh and delivers 3,840 W on both 120V and 240V. It accepts 2,400 W of solar, recharges from the wall at 3,840 W and is expandable. It is rated for 6,000 cycles, comes with a 5 year warranty and weighs 83.8 lb.

The DELTA 3 Ultra stores 3,072 Wh and delivers 3,600 W with a 7,200 W surge, but on 120V only. It accepts 800 W of solar, is not expandable and has a 3 year warranty. It switches over in 10 ms for UPS use and weighs 72.1 lb.

That shows up in the lists. The Apex 300 is 1st with 71 points on fast-charging power stations and 10th with 48 on power stations for solar, against 21st with 39 for the DELTA 3 Ultra. The DELTA 3 Ultra is 5th with 59 on UPS power stations and 16th with 69 on lightweight power stations.

Which to buy

Pick the Apex 300 if you want 240V, plan a large solar array or may add batteries later. It is built to grow with the house.

Pick the DELTA 3 Ultra if 120V is enough, you want more stored energy in one unit and a lower price, and you value the UPS switchover.

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