EcoFlow DELTA 3 Series: Which Size Fits Your Fridge-and-Wi-Fi Backup?

By Ross Calder · Updated 2026-10-27T02:56:06.146Z · How we choose · How we make money

We may earn a commission if you buy through links on this page, at no extra cost to you. Our picks are based on the data shown, not on what pays us.

What changed: The DELTA 3 Classic is at its $699 90-day high and trending up from a $499 low, while the Max, Plus and DELTA 3 all sit at their 90-day lows.

EcoFlow DELTA 3 Classic Portable Power Station (1024Wh)

$699.00 90-day range $499.00 – $699.00 trend: rising

Pros

• 1024Wh LFP capacity with 1800W output and 2600W X-Boost for fridges and a few outlets
• 500W max solar input and 1400W AC charging for flexible recharge
• 10ms UPS switchover and 5-year warranty
• USB-C1 at 100W and USB-C2 at 30W plus 18W USB-A

Cons

• At $699.00 it is $10.00 more than the DELTA 3 and $200.00 less than the DELTA 3 Max
• Price is at its 90-day high of $699.00 and trending rising, up from a $499.00 low

Who it's for: Anyone wanting a 1kWh-class LFP backup with fast AC and solar charging for a fridge, wifi and a few outlets.

Check price at us.ecoflow.com

EcoFlow DELTA 3 Max Series Portable Power Station (2048Wh)

$899.00 90-day range $899.00 – $899.00 trend: flat Lowest price in 90 days

Pros

• 2048Wh LFP capacity, double the 1024Wh units in the lineup
• 3000W AC output with 3800W X-Boost for heavier loads
• 1000W max solar input and 30A Anderson plus 12.6V/30A DC output
• 5-year warranty

Cons

• At $899.00 it sits at its 90-day high with a flat trend, $200 more than the DELTA 3 Classic
• Largest of the group at 494mm×242mm×305mm

Who it's for: Anyone needing roughly 2kWh of backup for a fridge and essentials who wants more output headroom and solar input than the 1024Wh models offer.

Check price at us.ecoflow.com

EcoFlow DELTA 3 Plus Portable Power Station

$1159.00 90-day range $1159.00 – $1159.00 trend: flat Lowest price in 90 days

Pros

• 1024Wh LFP battery rated for 4000 cycles to 80+% capacity
• 1800W output with 2200W X-Boost for higher-draw devices
• 13 output ports including 2 USB-C and 2 fast-charge USB-A
• IP65 battery pack and 30 dB noise level

Cons

• At $1159.00 it costs $460.00 more than the DELTA 3 Classic and $470.00 more than the DELTA 3
• 1024Wh capacity is half the 2048Wh of the DELTA 3 Max, which costs $260.00 less

Who it's for: Anyone who wants a quiet, IP65-rated 1024Wh LFP station with plenty of ports and is willing to pay a premium over the other 1024Wh DELTA 3 models.

Check price at us.ecoflow.com

EcoFlow DELTA 3 Portable Power Station

$689.00 90-day range $689.00 – $689.00 trend: flat Lowest price in 90 days

Pros

• 1024Wh LFP battery rated for 4000 cycles to 80+% capacity
• 1800W output with 2200W X-Boost for higher-draw devices
• 13 output ports including 2 USB-C and 2 fast-charge USB-A, plus <10ms UPS
• IP65 battery pack and 30 dB noise level

Cons

• At $689.00 it sits $10.00 above the DELTA 3 Classic
• 1024Wh may be tight for longer fridge backup runs

Who it's for: Anyone wanting a quiet, high-cycle 1kWh home backup with plenty of ports for a fridge, wifi and a few outlets.

Check price at us.ecoflow.com

How we chose

We started with the need: enough capacity to run a fridge, wifi and a few outlets, without paying for capacity we would not use. That puts the useful range at 1–2 kWh, so we compared the four models on capacity, output, charge input and current price.

Capacity and output separate them clearly. The DELTA 3 Classic and the DELTA 3 both give 1024 Wh and 1800 W, with 1500 W AC charging, 800 W car charging and a 4000-cycle rating to 80+% capacity. The DELTA 3 Max Series steps up to 2048 Wh and 3000 W output, with 1000 W maximum PV input. The DELTA 3 Plus matches the DELTA 3 on capacity and output and adds an IP65 battery pack.

On price, the DELTA 3 is $689.00, the DELTA 3 Classic is $699.00, the DELTA 3 Max Series is $899.00 and the DELTA 3 Plus is $1159.00. The gaps are $10.00 between the DELTA 3 and the Classic, $200.00 between the Classic and the Max Series, $210.00 between the DELTA 3 and the Max Series, $260.00 between the Max Series and the Plus, $460.00 between the Classic and the Plus, and $470.00 between the DELTA 3 and the Plus. We favored the capacity that covers a fridge plus outlets without overspending.

Who should skip these

If your backup needs are just phones and a router, a 1024Wh unit is more than you need. The DELTA 3 at $689 and the DELTA 3 Classic at $699 both carry 1024Wh, and the Classic costs $10.00 more than the DELTA 3. The step up to the DELTA 3 Max at 2048Wh costs $210.00 more than the DELTA 3, and the Plus costs $470.00 more than the DELTA 3.

At the other end, if you want to run large appliances or a whole panel, none of these is the right size. The largest here is the DELTA 3 Max at 2048Wh with 3000W output, and it costs $260.00 less than the Plus.

The Plus is the most expensive of the four at $1159.00, $460.00 more than the Classic. All four carry a 5-year warranty.

How to choose the right one

Start with capacity. The DELTA 3 and DELTA 3 Plus each give you 1024 Wh, which is the size to look at for short fridge backup — keeping a fridge, wifi and a few outlets going through a brief outage. If your outages run longer, the DELTA 3 Max Series steps up to 2048 Wh, with 3000 W output.

Output matters alongside capacity. The DELTA 3 and DELTA 3 Plus are rated at 1800 W, and the Max Series at 3000 W. All three use LFP chemistry and carry a 5-year warranty.

The Plus is the one to consider only if you need its IP65 battery pack and its 4000-cycle rating to 80+% capacity; the DELTA 3 lists the same 4000-cycle rating and IP65 pack. On price, the DELTA 3 is $689, the Classic is $699, the Max Series is $899 and the Plus is $1159. The Plus costs $260.00 more than the Max Series and $470.00 more than the DELTA 3, so the pack is what you are paying the premium for.

Questions readers ask

By Ross Calder · Published 2026-09-11 · Updated 2026-10-27