EcoFlow DELTA Pro 3 vs Jackery Explorer 5000 Plus: Which 240 V Home Backup?

Buy the Jackery Explorer 5000 Plus if you have a ¾ hp or larger 240 V well pump, want the most output and the biggest starting battery, or need a 0 ms online UPS for computers; buy the EcoFlow DELTA Pro 3 if you want the lighter unit, a TT-30 RV outlet and a better-rated battery. Both are 120/240 V home-backup units with an L14-30 outlet for a transfer switch, and both need a licensed electrician to connect to your house.

EcoFlow DELTA Pro 3: lighter, with an RV outlet

The DELTA Pro 3 holds 4,096 Wh and supplies 4,000 W at 120/240 V with an 8,000 W surge. Its outlets are four 20 A household receptacles, a TT-30 for an RV, a NEMA 6-20 at 240 V and an L14-30 at 120/240 V. EcoFlow lists a 10 ms UPS switchover and UL 9540 listing, and rates the battery for 4,000 cycles to 80%, a stricter end point than Jackery's 70%. It weighs 113.54 lb on wheels.

Solar goes in through two inputs, up to 1,600 W at 30–150 V and 1,000 W at 11–60 V, 2,600 W in all. Extra batteries take it to 12,288 Wh. X-Boost lets heating loads up to 6,000 W run at reduced power, which doesn't help motors start. 12 V power comes from DC5521 and Anderson ports; a car-style socket isn't confirmed. The warranty is 5 years.

Not for you if: you have a ¾ hp or larger 240 V well pump, or want room to grow past about 12 kWh.

Jackery Explorer 5000 Plus: the most output and the biggest battery

The Explorer 5000 Plus holds 5,040 Wh and supplies 7,200 W at 120/240 V with a 14,400 W surge, the highest surge rating in our catalog. It has four 120 V outlets, a 120/240 V outlet Jackery lists as L14-30R/14-50, a car socket, two 100 W USB-C ports and two USB-A ports. In online UPS mode its NEMA 5-20 outlets switch over in 0 ms, up to 3,600 W; after a restart it reverts to backup mode at under 20 ms. It pairs with Jackery's 60 A Smart Transfer Switch.

Some of its biggest numbers are softer. The 4,000 W solar input (High-PV 135–450 V, Low-PV 16–60 V) and the 60 kWh expansion ceiling are marketing figures we mark as unconfirmed. From a standard outlet it charges at 1,800 W, with a full charge listed at 210 minutes. The battery is rated for 4,000 cycles to 70%. Output drops to 3,600 W at 5–14 °F. It weighs 134.5 lb. The warranty is 5 years.

Not for you if: you need a TT-30 for an RV, the unit lives somewhere very cold, or it has to be moved often.

How do they connect to a house?

The same basic way: the L14-30 outlet feeds a power inlet box with an interlock, a manual transfer switch, or the maker's panel. Each keeps the house disconnected from the grid while the battery runs it. All of these are permanent electrical work, so hire a licensed electrician and pull a permit. Never use a double-male cord or plug either unit into a wall or dryer outlet to feed the house. Our DELTA Pro 3 vs F3800 Plus guide covers the other big 240 V rival.

Who should buy which

• Buy the Jackery Explorer 5000 Plus if a larger 240 V well pump is on the list, you want a full day of essentials without extra batteries, or a home office needs the 0 ms online outlets. UPS vs EPS explains what that switchover difference means.
• Buy the EcoFlow DELTA Pro 3 if it also powers an RV through a TT-30, you want the more manageable unit, or a battery rated to 80% after 4,000 cycles matters to you.
• Buy neither if you only need a fridge, Wi-Fi and lights; a 2 kWh unit does that without house wiring. Our home backup guide sorts the options by outage type, and cold weather and storage covers winter garages.