Two Near Twins With One Real Difference
Is there a real gap between the Anker Solix C2000 Gen 2 and the EcoFlow DELTA 3 Max? Barely, until you ask what happens next year. Both hold 2,048Wh of LFP and put out 2,400W. Anker lists $899.99, EcoFlow $879. The difference is where each one can grow, and what happens when you point either at a 10 kWp roof.
TL;DR: The C2000 Gen 2 takes 800W of solar and grows to 4kWh for $391 per kWh. The DELTA 3 Max takes 500W and can't grow. EcoFlow's DELTA 3 Max Plus takes 1,000W and grows to 10kWh, at $561 per kWh for the single unit. On a 10 kWp roof at 40% self-consumption, none of them pays back inside the warranty.
I read both manufacturers' spec tables line by line and cross-checked each figure against a second source. Where the sources disagree, the table says so rather than picking a winner. Prices are the listings on 1 October 2026 and they move weekly.
The Spec Table, Checked Twice
| Spec | Anker C2000 Gen 2 | EcoFlow DELTA 3 Max | EcoFlow DELTA 3 Max Plus |
|---|---|---|---|
| Capacity | 2,048Wh | 2,048Wh | 2,048Wh |
| Rated output | 2,400W | 2,400W (3,400W X-Boost) | 3,000W (3,800W X-Boost) |
| Surge | 4,000W | 4,800W, see note | 6,000W |
| Solar input | 800W, 11-60V, 17A | 500W, 11-60V | 1,000W |
| Expansion | BP2000, 4kWh total | None | 2-10kWh |
| Cycle life | 4,000 to 80% | Not printed, see note | Not printed, see note |
| Warranty | 5 years | 5 years (3 + 2 on app signup) | 5 years (3 + 2) |
| Weight | 18.9kg (41.7 lb) | 20.3kg | 22.1kg |
| Price, 1 Oct 2026 | $899.99 | $879 (sale) | $1,149 (sale) |
Two notes. EcoFlow's page says 4,800W surge for the DELTA 3 Max while one retailer's chart lists 3,600W, so ask before you buy for a big motor. And EcoFlow's Max pages promise ten years instead of a cycle count; a retailer chart lists at least 3,500 cycles to 80%, Anker prints 4,000. That's a gap of 500 cycles, about 16 months at one cycle a day.
Now price per kWh, because that's where the three separate. The C2000 comes to $439 per kWh, the DELTA 3 Max $429, the Plus $561. Double up and the gap widens: Anker's bundle with the BP2000 is $1,599.99 for 4,096Wh, or $391 per kWh. EcoFlow's Plus with its extra battery is $2,049 for the same capacity, $500 per kWh.
The DELTA 3 Max wins by $20.99 and loses every other line of the table. That's my opinion, and you can disagree: nobody should buy the plain Max when the C2000 costs $21 more, weighs 1.4kg less, takes 60% more solar and accepts a second battery. EcoFlow's own Plus fixes all of that, for $249 more than the Anker.
The 10 kWp Scenario, Arithmetic Shown
Here's the setup. Assumptions first, so you can swap yours in:
- 10 kWp array at 1,400 kWh per kWp a year, which is 14,000 kWh (check your address in PVWatts).
- 40% used on site: 5,600 kWh. The other 8,400 kWh, about 23 kWh a day, is exported.
- Retail 18.31 cents per kWh, the EIA's July 2026 US residential average. Export credit 10 cents, then 6.
- 80% round trip. The Solar Lab measured 79% on the DELTA 3 Max.
- One full cycle every day, 365 a year. That's generous, because winter surplus is thin.
Our own solar payback calculator lets you change the export rate and self-consumption share, and the whole result below turns on those two numbers.
Each unit absorbs 2.048 kWh x 365 = 748 kWh from the surplus and returns 598 kWh. Those 598 kWh offset retail, worth $109.50. The 748 kWh would otherwise have been exported, worth $74.75 at 10 cents. Net: $34.74 a year.
| Setup | Cost | Net per year, 10c export | Payback | Net per year, 6c export | Payback |
|---|---|---|---|---|---|
| C2000 Gen 2 | $899.99 | $34.74 | 25.9 yr | $64.65 | 13.9 yr |
| DELTA 3 Max | $879 | $34.74 | 25.3 yr | $64.65 | 13.6 yr |
| DELTA 3 Max Plus | $1,149 | $34.74 | 33.1 yr | $64.65 | 17.8 yr |
| C2000 + BP2000 | $1,599.99 | $69.49 | 23.0 yr | $129.29 | 12.4 yr |
| Plus + extra battery | $2,049 | $69.49 | 29.5 yr | $129.29 | 15.8 yr |
Self-consumption moves from 40% to 45.3% with one unit, 50.7% with two. So when does a cycle lose money? Here's the part nobody puts in the product description: break-even export is 0.80 x 18.31 = 14.6 cents. Above that, each cycle loses money.
What It Takes to Reach 70%
To lift that roof from 40% to 70% you'd shift 4,200 kWh a year, 11.5 kWh a day. That's 5.6 units, so six C2000s at $5,399.94, or three C2000 + BP2000 bundles at $4,799.97 for 12.3 kWh. Our Powerwall 3 vs IQ 5P comparison put three installed Enphase IQ Battery 5P units at $24,000 to $33,000 for 15 kWh, or $1,600 to $2,200 per kWh. The stations are a fifth of that per kWh. They're also five-year products that run only what you plug into them.
A portable power station earns its price as backup, not as a spread trade: at a 10 cent export rate, one unit nets about $35 a year.
Does it charge itself from your surplus? Not by watching your meter, as far as either company's pages say. Trusted Reviews describes Anker's mode recharging "when electricity's cheap", and EcoFlow lists scheduled tasks, so plan on setting the midday window yourself.
Their Own Panels Are a Different Story
Skip the roof and feed a station its own panels, and the solar input rating becomes the number that matters. At the same 1,400 kWh per kWp, a day averages 3.84 kWh per kWp:
| Unit | Solar input | Average daily fill | Share of one 2,048Wh unit |
|---|---|---|---|
| DELTA 3 Max | 500W | 1.92 kWh | 94% |
| C2000 Gen 2 | 800W | 3.07 kWh | 150% |
| DELTA 3 Max Plus | 1,000W | 3.84 kWh | 187% |
The Max can't quite fill itself on an average day. The C2000 fills itself and half a second battery. Pair the Plus with its extra battery and 1,000W reaches 94% of the 4,096Wh. For off-grid, the Plus has the best match. Our C2000 Gen 2 review covers the Anker side, and the C300X vs C1000X sizing guide helps if 2 kWh is more than you need.
Which One I'd Buy, and When I'd Buy Neither
For the cheapest kWh and a 4kWh ceiling, the C2000 Gen 2 with the BP2000. For 3,000W, 1,000W of solar and room to reach 10kWh, the DELTA 3 Max Plus, paying $110 to $120 more per kWh. The plain Max, no.
For a 10 kWp roof, though, I'd skip both and spend the first $900 on shifting a dishwasher, hot water and laundry into daylight. Moving 5 kWh a day costs next to nothing and beats 1.64 kWh from a battery. Our battery sizing guide has the maths for a fixed battery. Whether 2 kWh of backup alone justifies $900 is the question only your last outage can answer.
For all five current 1 to 2 kWh models in one table, from Anker, EcoFlow, Jackery and Bluetti, see our portable power station comparison.