EcoFlow DELTA 2 Owner's Guide: Specs, Camping, Solar and Comparisons

The EcoFlow DELTA 2 is a 1,024Wh, 1,800W portable power station now priced at $449. This owner's guide covers specs, camping, solar charging, expansion and how it compares with the DELTA 3.

The Short Answer

The EcoFlow DELTA 2 is the power station that made LFP mainstream in the 1kWh class. Launched in 2022 to replace the original Delta, it packed 1,024Wh of long-life battery, 1,800W of output and fast charging into a 27 lb box that has become one of the most common power stations in campgrounds, RVs and storm kits.

In 2026 it has a successor in the DELTA 3, which charges faster and runs quieter, and that has pushed the DELTA 2's price down to $449. At that price it is the best-value 1kWh unit EcoFlow sells. This guide is the complete owner's manual: specs, what it runs, how to camp with it, how to keep it charged from the sun, how it compares with its siblings, and how to make it last.

Specifications

Capacity	1,024Wh
Expansion	One DELTA 2 Smart Extra Battery (2,048Wh total) or one DELTA Max Smart Extra Battery (3,040Wh total)
Chemistry	LFP, 3,000 cycles to 80%+
AC output	6 outlets, 1,800W total, 2,700W surge; X-Boost to 2,200W
USB	2 × USB-A 12W, 2 × USB-A fast charge 18W, 2 × USB-C 100W
DC	Car port 126W, 2 × DC5521 38W
AC charging	1,200W
Solar input	500W max, 11 to 60V, 15A
Car charging	12V or 24V, 8A
Size and weight	15.7 × 8.3 × 11 in, 27 lbs
Connectivity	Wi-Fi and Bluetooth app
Price	$449; $799 with a DELTA 2 Smart Extra Battery; solar bundles available

Specifications and prices are from the current Wild Oak Trail product page.

DELTA 2 vs the Original Delta

The DELTA 2 was designed to replace the original Delta, often called the Delta 1300, and the two are easy to confuse. The original had a slightly larger 1,260Wh battery and the same 1,800W output, but it used nickel-based lithium cells rated for roughly 800 cycles, weighed about 31 lbs, and could not take an extra battery.

The DELTA 2 dropped capacity to 1,024Wh but moved to LFP cells rated for 3,000 cycles, nearly four times the life, cut weight to 27 lbs, added a 500W solar input and expansion, and raised X-Boost from about 1,800W to 2,200W. For anyone still running an original Delta, the DELTA 2 is a clear upgrade in everything except raw capacity, and the DELTA 3 is a better one still.

What the DELTA 2 Runs

An 1,800W inverter covers the large majority of household plug-in appliances, and X-Boost handles resistive loads up to 2,200W such as kettles and hair dryers. The battery, at about 870Wh usable after inverter losses, determines how long. Divide 870 by an appliance's average watts to get hours.

Appliance	Average draw	Runtime on one DELTA 2
Full-size refrigerator	About 60W (cycling)	About 14 to 17 hours
RV or 12V compressor fridge	About 40W	About 20 hours
CPAP without humidifier	About 35W	About 25 hours, or 3 nights
Laptop	50W	About 17 hours
Wi-Fi router and modem	15W	About 58 hours
55-inch TV	100W	About 8.5 hours
Coffee maker (10 minutes)	1,000W	About 5 pots
Induction cooktop	1,800W on high	About 30 minutes of high-heat cooking
Space heater	1,500W high / 750W low	About 35 minutes / 70 minutes
Portable AC (EcoFlow Wave class)	500 to 700W	About 1.3 to 1.7 hours; add a battery for an evening
Phone charging	About 15Wh each	About 60 full charges

The pattern is the same as every battery: cycling and low-draw devices run for days; anything that makes heat runs for minutes. Cooking and heating are best kept short or moved to propane; the DELTA 2 shines at keeping food cold, devices charged and lights on.

Camping and RV Use

The DELTA 2's 27 lb weight and suitcase footprint are why it became a campground fixture. A typical family weekend load looks like this:

• 12V fridge overnight and through the day: about 0.6kWh
• String lights and a lantern, 4 hours: about 0.1kWh
• Phones, tablets, a camera and a speaker: about 0.2kWh
• A fan overnight: about 0.5kWh
• Coffee in the morning: about 0.15kWh

That is about 1.5kWh a day, so a single DELTA 2 lasts a weekend without charging if you skip the fan, or one full day with it. Add a 220W bifacial panel and a day of decent sun replaces everything you used, making the trip length open-ended. In an RV the DELTA 2 is the right size to run the 12V fridge, lights and electronics while dry camping, and to run the microwave or coffee maker briefly without starting the generator. It is not enough to run an RV rooftop air conditioner; for that you need the Delta Pro or larger.

One habit makes camping with it much easier: recharge from the vehicle while you drive. The 12V car input is slow at about 100W, but six hours on the highway puts back 600Wh. With the EcoFlow 800W Alternator Charger the DELTA 2 fills completely on a two-hour drive.

Solar Charging the DELTA 2

The DELTA 2's solar input accepts up to 500W at 11 to 60V and 15A. That voltage window is the most important number when choosing panels.

• Best single panel: the EcoFlow 220W bifacial. Its open-circuit voltage of about 21.8V is well inside the window, its rear face adds output from reflected light, and one panel recharges the DELTA 2 in about five to six hours of good sun. Two in series (about 44V) deliver 440W and cut that to under three hours.
• The 400W panel: one EcoFlow 400W at about 48V open-circuit also fits and gives the fastest single-panel charge, about two and a half hours in full sun. Do not put two 400W panels in series; about 96V exceeds the 60V limit. Wire them in parallel instead.
• Rigid panels: 12V-class rigid panels from Rich Solar or others, with open-circuit voltages around 22 to 25V, can be run in pairs in series through an MC4 to XT60 adapter. This is the cheapest way to keep a DELTA 2 topped up at a cabin or on a shed roof.

In poor weather, panels still produce 20 to 40 percent of their rating. Two 220W panels under heavy cloud might deliver 100 to 150W, which over a day is still more than a fridge uses. Angle panels toward the sun, keep them cool and clean, and use the app's live input reading to confirm they are working; a panel that reads a quarter of its rating at noon is shaded or mis-aimed.

Expansion

The DELTA 2 takes one extra battery. The DELTA 2 Smart Extra Battery ($369) doubles capacity to 2,048Wh and is the natural choice. The DELTA Max Smart Extra Battery ($1,199) takes it to 3,040Wh if you want the most capacity on one small inverter. Both connect with a single cable and are managed as one system in the app. Both also work with the DELTA 3 and DELTA 3 Plus, so a battery bought today is not stranded if you upgrade later. Our expansion battery guide covers every pairing.

DELTA 2 vs DELTA 2 Max vs DELTA 3

Spec	DELTA 2	DELTA 2 Max	DELTA 3
Capacity	1,024Wh	2,048Wh	1,024Wh
Output	1,800W (2,700W surge)	2,400W (4,800W surge)	1,800W (3,600W surge)
Wall charging	1,200W	1,800W	1,500W, full in ~56 min
Solar input	500W	1,000W (dual)	500W
Max expansion	3,040Wh	6,144Wh	5kWh
Cycle life	3,000	3,000	LFP, 3rd gen
Weight	27 lbs	About 50 lbs	27.5 lbs
Price	$449	$1,249	$629

Choose the DELTA 2 for the best price on a 1kWh LFP unit. Choose the DELTA 2 Max when you need 2kWh, 2,400W and dual solar inputs for an RV or day-long outages. Choose the DELTA 3 when faster charging, quieter fans and a longer cycle rating are worth $180 more. See every Delta model compared for the full lineup.

Maintenance and Battery Care

• Temperature is the main thing. Charge between about 32°F and 113°F and store between about 0°F and 113°F. Do not leave it in a hot car.
• Storage charge. Keep it around 50 to 80 percent when idle for long periods and top it up every three to six months. Never store it empty.
• Slow charging when convenient. The app can cap AC charging speed. Fast charging is safe; slow overnight charging is marginally gentler over years.
• Partial cycles are fine. LFP has no memory. Topping up from 60 to 90 percent does not "waste" a cycle.
• Keep vents clear. Leave a few inches around the fan intakes and exhausts, especially inside an RV cabinet.
• Update firmware. EcoFlow pushes battery management improvements through the app.
• Protect it. The DELTA 2 waterproof bag ($69) keeps rain and dust off while leaving the ports accessible.

Who Should Buy the DELTA 2 in 2026

• Anyone who wants a proven 1kWh LFP power station at the lowest price EcoFlow offers.
• Campers, tailgaters and RV dry-campers who need fridge, lights and devices covered for a weekend.
• Households that want a fridge and router covered through short outages.
• DELTA 2 owners looking for a second unit or extra battery; everything stays compatible.

If you charge mainly from solar, use the unit daily, or want it as a desk UPS, the DELTA 3 Plus is worth the step up. The DELTA 2 and its bundles are in stock at Wild Oak Trail in the EcoFlow collection, and we price match.

Frequently Asked Questions

Is the EcoFlow DELTA 2 still worth buying?

Yes. At $449 it is the best-value 1kWh LFP power station EcoFlow sells: 1,024Wh, 1,800W, 27 lbs, 3,000-cycle battery and expansion to 3,040Wh. The newer DELTA 3 charges faster and runs quieter for $180 more, but the DELTA 2 remains a strong buy for campers and short-outage backup.

How long will the EcoFlow DELTA 2 run a refrigerator?

About 14 to 17 hours for a full-size refrigerator, or about 20 hours for a 12V compressor fridge. Add a DELTA 2 Smart Extra Battery to roughly double that, or a 220W solar panel to extend it indefinitely in good sun.

What solar panel works with the EcoFlow DELTA 2?

Any panel or array delivering 11 to 60 volts up to 500W. The EcoFlow 220W bifacial is the best single-panel match and two can be wired in series. One EcoFlow 400W panel also fits; two 400W panels must be wired in parallel, not series, to stay under 60V.

Can I add an extra battery to the DELTA 2?

Yes, one. The DELTA 2 Smart Extra Battery takes it to 2,048Wh and the DELTA Max Smart Extra Battery takes it to 3,040Wh. Both batteries also work with the DELTA 3 and DELTA 3 Plus.

What is the difference between the DELTA 2 and the original Delta?

The DELTA 2 has a slightly smaller 1,024Wh battery versus 1,260Wh, but uses LFP cells rated for 3,000 cycles instead of about 800, weighs 27 lbs instead of about 31, adds a 500W solar input and expansion, and raises X-Boost to 2,200W.

How long does the DELTA 2 take to charge?

From a wall outlet at 1,200W, under two hours. From a single 220W solar panel in good sun, about five to six hours; from two 220W panels in series or one 400W panel, about two and a half to three hours. From a vehicle's 12V port, about ten hours.