OUPES MEGA 2 Pro vs EcoFlow DELTA 3 Max

Between the compared models, choose the EcoFlow DELTA 3 Max for a standalone essential-load backup plan that fits its 2,048Wh capacity and 2,400W continuous AC output. Choose the OUPES MEGA 2 Pro with a B2 battery for longer backup through supported expansion, provided you can obtain the complete kit. Both base stations store 2,048Wh, so the Pro's slightly higher output does not buy extra hours by itself. OUPES specifications, EcoFlow specifications.

For alternatives serving the same essential-load backup job, also consider the Anker SOLIX C2000 Gen 2 and Jackery Explorer 2000 v2 in the product cards below. The named OUPES and EcoFlow models remain the comparison's subject; these alternatives have their own output, expansion and recharge limits.

Quick picks

Compare specifications and all conditions

Essential appliances, no battery expansion planned

Pick

DELTA 3 Max

Deciding condition

Size the load against 2,400W and the runtime below

Longer runtime with room to grow

Pick

MEGA 2 Pro + B2

Deciding condition

Confirm stock of both station and battery; B2 is the supported battery

Expandable EcoFlow with more running power

Pick

DELTA 3 Max Plus

Deciding condition

Separate model with 3,000W output; same initial 2,048Wh

Also consider for similar base capacity with expansion

Pick

Anker SOLIX C2000 Gen 2

Deciding condition

2,048Wh and 2,400W AC; one BP2000 (Gen 2) battery expands capacity to 4,096Wh

Also consider for standalone plug-in essentials

Pick

Jackery Explorer 2000 v2

Deciding condition

2,042Wh and 2,200W rated AC; solar input is capped at 400W

Full comparison table ↔

Swipe to compare. Row labels stay visible.

Your requirement	Pick	Deciding condition
Essential appliances, no battery expansion planned	DELTA 3 Max	Size the load against 2,400W and the runtime below
Longer runtime with room to grow	MEGA 2 Pro + B2	Confirm stock of both station and battery; B2 is the supported battery
Expandable EcoFlow with more running power	DELTA 3 Max Plus	Separate model with 3,000W output; same initial 2,048Wh
Also consider for similar base capacity with expansion	Anker SOLIX C2000 Gen 2	2,048Wh and 2,400W AC; one BP2000 (Gen 2) battery expands capacity to 4,096Wh
Also consider for standalone plug-in essentials	Jackery Explorer 2000 v2	2,042Wh and 2,200W rated AC; solar input is capped at 400W

Your requirement	Pick	Deciding condition
Essential appliances, no battery expansion planned	DELTA 3 Max	Size the load against 2,400W and the runtime below
Longer runtime with room to grow	MEGA 2 Pro + B2	Confirm stock of both station and battery; B2 is the supported battery
Expandable EcoFlow with more running power	DELTA 3 Max Plus	Separate model with 3,000W output; same initial 2,048Wh
Also consider for similar base capacity with expansion	Anker SOLIX C2000 Gen 2	2,048Wh and 2,400W AC; one BP2000 (Gen 2) battery expands capacity to 4,096Wh
Also consider for standalone plug-in essentials	Jackery Explorer 2000 v2	2,042Wh and 2,200W rated AC; solar input is capped at 400W

Also consider: Anker SOLIX C2000 Gen 2. Its 2,048Wh LiFePO4 battery and 2,400W AC output match the DELTA 3 Max's nominal capacity and continuous output, while supporting expansion to 4,096Wh with one BP2000 (Gen 2) battery. Its 800W solar-input ceiling applies to this station. Confirm the matching battery and connection requirements before planning an expanded kit.

Also consider: Jackery Explorer 2000 v2. Its 2,042Wh LiFePO4 battery suits the same essential-load task, with 2,200W rated AC output and up to 400W solar input. Its output is lower than either compared model's, so check running and starting demand against the Jackery's own limits. The comparison and runtime tables below describe the named OUPES and EcoFlow models.

Compare the exact US stations

Manufacturer figures for stations alone; official specifications and manuals are linked in the model sections below.

MEGA 2, MEGA 2 Pro, Max and Max Plus are different purchases

OUPES's US Pro manual names MEGA 2 Pro, version OPS-PPS-C2048H-V1.2, and specifies the US AC output. Its original MEGA 2 manual instead lists 2,100W solar input and 5,400W surge. The Pro specifies 1,000W solar and 3,800W peak, with 3,600W Boost listed separately. A review or bundle titled only “MEGA 2” cannot establish Pro specifications.

Similarly, DELTA 3 Max Plus adds expansion and higher output to DELTA 3 Max; the word “Plus” matters. OUPES's Pro page also displays specifications for B2 and a solar panel below the station's own table. The B2's 2,100W solar input belongs to the accessory, not the Pro's station input.

EcoFlow DELTA 3 Max: best standalone option

Pick Max when your load and outage-length calculation already fit its base capacity. You avoid assembling an expansion system, but its 500W solar ceiling and absence of a battery port set limits on future growth. Buying an extra EcoFlow battery later does not turn this model into Max Plus. Max specifications and compatibility note.

For a fridge, check the AC timeout setting: EcoFlow's Max manual warns that intermittent appliances can trigger automatic AC shutoff and recommends “never” when continuous availability is required.

OUPES MEGA 2 Pro: expandable alternative when available

The useful upgrade is Pro + B2, not the small difference in continuous watts. OUPES explicitly supports B2 Extra Batteries, 2,048Wh each, and excludes G5. One B2 gives 4,096Wh nominal capacity, calculated by addition, while retaining the Pro's 2,500W inverter. Up to four B2 units produce the advertised 10.24kWh system. Official battery compatibility.

The TT-30R socket is useful for compatible RV equipment, but its connector rating does not raise the station's shared output. For home backup, choose the exact station, batteries and recharge equipment together. Check the MEGA 2 Pro configuration with OUPES.

EcoFlow DELTA 3 Max Plus: choose it for expansion or higher output

Max Plus supplies 3,000W continuously and supports extra batteries, but starts with the same stored energy as Max. A matching DELTA 3 Max Plus Smart Extra Battery adds 2,048Wh, producing 4,096Wh nominal by addition. It is a battery accessory requiring the station, not another complete power station. Station specifications, matching battery.

Check the exact Max Plus bundle; the site's DELTA 3 model guide explains the wider family.

Essential-load runtime on identical assumptions

For an illustrative fridge, network and lights plan averaging 200W, use estimated hours = nominal Wh × 80% ÷ average AC watts. The 80% is our chosen allowance for conversion losses and reserve, not measured efficiency for either station; actual idle consumption and appliance cycling can change the result. At base capacity, 2,048Wh × 80% ÷ 200W gives about eight hours; adding a supported 2,048Wh battery approximately doubles that estimate.

Table values are estimated hours, rounded down, using the same allowance and no incoming charging. They are planning examples, not appliance-specific promises. If the estimate barely covers your outage target, choose more storage or reduce the load. Start with your appliance's energy use and starting demand; the portable power station guide covers broader sizing choices.

Continuous watts and motor startup must pass separately. Neither a peak figure nor Boost mode guarantees that a particular compressor starts. EcoFlow's manual says X-Boost can reduce voltage and is unavailable during AC charging; size essential loads to rated output instead. Max manual.

The battery-and-cable shopping list

Sources: Pro box contents, Pro solar instructions, B2 box contents, Max manual, Max Plus cable compatibility.

For the OUPES ceiling, the shopping list becomes one Pro, four B2 batteries and four included expansion cables. EcoFlow's roughly 10kWh Max Plus configuration instead needs two DELTA Pro 3 Smart Extra Batteries and the Extra Battery Expansion Adapter, plus the appropriate battery cables. Its station page says the adapter is released in the body but “released soon” in footnotes; get a complete, deliverable cable-and-adapter list before ordering that larger system. EcoFlow configuration footnotes, adapter listing.

• DELTA 3 Max standalone2048Wh
• MEGA 2 Pro + one B24096Wh
• DELTA 3 Max Plus + matching extra battery4096Wh

Source: Manufacturer capacities above; expanded totals are addition, not measured usable energy

Recharge, bypass and winter limits

Wall charging: EcoFlow advertises 0–80% in 68 minutes for Max and 64 minutes for Max Plus. OUPES's 52-minute full-charge headline uses AC plus solar, up to 2,800W combined, rather than wall charging alone. Max Plus's 43-minute headline uses a Smart Generator. Compare like charging methods and endpoints. Max charging, Max Plus charging, Pro charging.

Solar: Pro specifies 12–80V input, 18–80V MPPT and 30A maximum; its manual requires panel open-circuit voltage below 80V. Max specifies 11–60V, 13A and 500W; its manual requires total panel Voc within 60V and Isc within 13A. Max Plus has two solar ports and 1,000W combined, with 60V Voc / 18A Isc limits in its manual; confirm current allocation between inputs before specifying an array. A matching plug alone does not establish compatibility. Pro manual, Max manual, Max Plus manual.

Bypass: Max's US manual limits bypass AC output to 13A total, below its battery-powered output rating. OUPES's Pro manual lists 2,500W bypass, but the product FAQ limits AC charging input plus all outputs to 2,400W. These statements describe different limits and leave usable simultaneous charging/load headroom unclear. Plan within the lower combined limit and obtain OUPES's confirmation for a demanding always-connected setup.

Winter: EcoFlow specifies charging at 0–45°C and discharging at −10–45°C. The Pro manual gives a 0–40°C working range, without separate permission for freezing-weather discharge. Choose a dry location within the applicable operating limits; a discharge rating below freezing does not authorize charging below freezing.

1. 1

   Confirm the exact model

   Match the US outlet version and its manual

2. 2

   Check running and starting demand

   Use rated output and confirm appliance startup

3. 3

   Size energy for the outage

   Apply the runtime assumptions and leave reserve

4. 4

   Check the refill path

   Match solar limits, bypass restrictions and operating temperature

For backup through household circuits, use a licensed electrician and obtain permits where required; have the electrician verify station and transfer equipment compatibility. The US AC ratings here do not establish 240V appliance support. See the home battery backup guide. EcoFlow installation requirements.

Black Friday and Cyber Monday: check the whole order

Compare station-only, battery and solar bundles as separate shopping lists. Confirm the model suffix, included battery count, expansion cable, solar adapter, seller, delivery status and return terms before checking the current purchase price.

OUPES states five years plus one after approved registration; its policy restricts coverage to qualifying purchases and makes returns depend on the purchase channel. EcoFlow's station pages state three years plus two with app registration. The Max Plus battery page contradicts itself between three plus two and five years basic, so confirm accessory coverage separately. Keep the receipt and registration confirmation. OUPES registration, OUPES policy, EcoFlow battery warranty wording.

How we choose

We compare official US specifications, manuals, compatibility lists and warranty terms, without physical product testing. Runtime figures are calculations. Source conflicts and unavailable components remain visible.

Verdict

Between the compared models, choose DELTA 3 Max when the standalone runtime fits. Choose MEGA 2 Pro + B2 when you need expansion and can secure the complete kit. Choose DELTA 3 Max Plus for expandable EcoFlow backup or higher continuous output. Decide from your essential load, outage duration and available recharge path; the model suffix and required accessories matter more than the largest number in a headline.

For alternatives, also consider Anker SOLIX C2000 Gen 2 for the same nominal base capacity as the compared models with supported battery expansion, or Jackery Explorer 2000 v2 for standalone essentials when its lower AC output and solar-input ceiling fit the plan. Use each alternative's own specifications when sizing the complete order.