The EcoFlow DELTA Mini and the DELTA 2 sit close together on paper: both are roughly one-kilowatt-hour stations with a pure sine inverter, X-Stream fast charging and an XT60 solar input. The differences that matter are battery chemistry, cycle rating, inverter size, expansion and warranty. This page compares the two from EcoFlow’s own published specifications. For each product on its own, see our DELTA Mini review and our DELTA 2 review.
Neither model is EcoFlow’s current flagship in this size. On 2026-10-06 EcoFlow’s US store listed the DELTA Mini as sold out and a pre-order item, filed under its older DELTA series, and the US store’s DELTA 2 product link redirected to the DELTA 3 page. EcoFlow does not state that either model is discontinued.
How this review was produced: we do not buy or test the products we cover. This is a desk analysis of manufacturer specifications, manuals and documentation, safety and certification listings, and publicly available owner reports and third-party reviews. Figures are manufacturer claims or reported owner results.
This page contains affiliate links. The product card below is the DELTA 3, EcoFlow’s current model in the line, not either of the two stations compared here.
DELTA Mini vs DELTA 2: The Published Specs Side by Side
DELTA Mini figures come from EcoFlow’s US product page unless marked EU (the 230V user manual). DELTA 2 figures come from EcoFlow’s US user manual and US product page. Warranty terms for both come from EcoFlow’s US warranty policy table.
| Specification | DELTA Mini | DELTA 2 |
|---|---|---|
| Capacity | 882Wh (50.4V) | 1024Wh (51.2V) |
| Chemistry | NCM lithium-ion | LFP (LiFePO4) |
| Cycle rating | 800 cycles to 80%+ capacity | 3,000 cycles to 80%+ capacity |
| AC output | 1,400W continuous, 2,100W surge | 1,800W continuous, 2,700W surge |
| X-Boost | 2,200W (EU 230V manual); no US figure published | Up to 2,200W |
| AC outlets (US) | 5 | 6 |
| USB-C | 100W max | 2 ports, 100W max each, 200W total |
| USB-A | 2 x 12W plus 1 x 18W fast charge | 2 x 12W plus 2 x 18W fast charge |
| Car outlet | 12.6V, 10A, 126W max | 12.6V, 10A, 126W max |
| AC charging | 900W max; 0-80% in under 1 hour, full in 1.6 hours | 1,200W max; 0-80% in 50 minutes, full in 80 minutes |
| Solar input | 300W max, 11-75V, 10A | 500W max, 11-60V, 15A |
| Car charging input | 12V/24V, 8A default | 12V/24V, 8A default |
| Expansion battery | Not mentioned by EcoFlow | One Smart Extra Battery |
| EPS switchover | Within 30ms (EU manual) | Within 30ms |
| Weight | 23.6 lb (10.7 kg) | 27 lb (about 12 kg) |
| Dimensions | 14.9 x 7.2 x 9.4 in | 15.7 x 8.3 x 11.1 in |
| Warranty | 24 months | 5 years |
Capacity and Weight: Closer Than the Names Suggest
The DELTA 2 carries 142Wh more, about 16 percent above the Mini’s 882Wh. It is also 3.4 lb heavier. Divide capacity by weight and the two land almost level: roughly 37Wh per pound for the Mini and roughly 38Wh per pound for the DELTA 2. The “Mini” name suggests a much lighter unit, but on EcoFlow’s numbers you are not buying better energy density with it, only a smaller total box.
For runtime, assume about 85 percent of rated capacity reaches an AC device after inverter losses. That gives roughly 750Wh usable from the Mini and roughly 870Wh from the DELTA 2. A 60W fridge drawing continuously would run roughly 12 hours on the Mini and roughly 14 hours on the DELTA 2. These are estimates from the ratings, not measured results; real draw varies with the appliance’s duty cycle, temperature and battery age.
NCM vs LFP: The Difference That Compounds
Chemistry is where the two models split most clearly. The Mini uses NCM lithium-ion cells rated for 800 cycles to 80%+ capacity. The DELTA 2 uses LFP cells rated for 3,000 cycles to the same threshold. Cycled once a day, 800 cycles is a little over 2 years of use, while 3,000 cycles is about 8 years. Cycled once a week, the Mini’s rating stretches to roughly 15 years, at which point calendar ageing matters more than cycle count.
A simple way to compare total useful energy is capacity times rated cycles. On paper the Mini delivers about 706kWh over its rated life and the DELTA 2 about 3,072kWh, roughly four times as much. That ignores gradual fade along the way, so treat it as a ratio rather than a promise. Our LFP vs NMC comparison covers the chemistry trade-offs in more depth.
Output: Which Appliances Each One Can Run
EcoFlow rates the Mini at 1,400W continuous with a 2,100W surge, and the DELTA 2 at 1,800W continuous with a 2,700W surge, both at 120V pure sine wave. The extra 400W of continuous output is the practical gap: a 1,500W kettle, hair dryer or space heater sits above the Mini’s continuous rating and inside the DELTA 2’s. Both offer X-Boost, which runs some resistive heating devices above the rated output by lowering their voltage. EcoFlow’s US manual gives the DELTA 2 an X-Boost ceiling of 2,200W; for the Mini only the EU 230V manual gives a figure, also 2,200W, so we do not quote a US X-Boost number for it.
Port counts favour the DELTA 2 slightly: 6 AC outlets against 5 on the US Mini, two 100W USB-C ports against the Mini’s single listed USB-C rating, and one more 18W fast-charge USB-A port. The 12V car outlet is the same 126W on both.
Charging Speed From Wall, Sun and Car
From the wall, the DELTA 2 accepts up to 1,200W and EcoFlow quotes 0-80% in 50 minutes and a full charge in 80 minutes. The Mini accepts up to 900W, with 0-80% in under an hour and a full charge in 1.6 hours. Both are fast enough that wall charging rarely limits a trip.
Solar is the bigger difference. The Mini takes up to 300W through its XT60 input (11-75V, 10A on the US page); the DELTA 2 takes up to 500W (11-60V, 15A). In ideal sun with the input fully saturated, that arithmetic is about 3 hours to fill the Mini and about 2 hours for the DELTA 2, before charge losses and before real-world panel output, which is usually well below the panel’s rating. EcoFlow’s own solar charge-time claims for the Mini are inconsistent across its page, so we leave them out. Car charging is the same on both: 12V or 24V at a default 8A, which EcoFlow puts at about 9.5 hours for a full Mini charge.
Expansion, Backup Use and Warranty
The DELTA 2’s manual says a single unit connects to one Smart Extra Battery, and EcoFlow’s page describes about 2kWh total with one DELTA 2 Extra Battery. Neither the Mini’s US product page nor its EU manual mentions an expansion battery, so treat its 882Wh as fixed.
Both stations offer an EPS function that switches to battery within 30ms when wall power drops. EcoFlow states neither supports 0ms switching, so neither is a substitute for a true online UPS on servers or workstations. For lamps, routers, fridges and similar loads, 30ms switchover is generally fine.
Warranty is a clear gap. EcoFlow’s US warranty policy lists 24 months for the DELTA Mini and 5 years for the DELTA 2. Combined with the cycle ratings, the DELTA 2 is the model EcoFlow itself expects to last longer.
Which One Should You Pick?
On paper, the DELTA Mini suits occasional users: weekend campers, a few outage nights a year, someone who wants a slightly smaller box and can find it at a good price. It was sold out on EcoFlow’s US store when we checked.
On paper, the DELTA 2 suits anyone who will cycle the battery often, such as daily van or off-grid use, anyone who needs 1,500W-class appliances, anyone who wants room to add a second battery, and anyone who values the longer warranty. Its 3,000-cycle LFP rating is the single strongest argument in this comparison.
Because both are older models, check current availability before deciding. If neither is in stock, the DELTA 3 shown above is EcoFlow’s current model in this size.
Frequently Asked Questions
Is the DELTA 2 worth the extra weight over the DELTA Mini?
On EcoFlow’s specs, the DELTA 2 adds 3.4 lb but also 142Wh of capacity, so the energy per pound is almost the same. In exchange for the weight you get LFP cells rated for 3,000 cycles instead of 800, 400W more continuous output and a 5-year warranty instead of 24 months.
Can I add an extra battery to the DELTA Mini?
EcoFlow does not mention expansion batteries for the DELTA Mini on its US product page or in its EU manual. The DELTA 2 supports one Smart Extra Battery, and EcoFlow describes about 2kWh total with one DELTA 2 Extra Battery.
Which charges faster from solar?
The DELTA 2 accepts up to 500W of solar against the Mini’s 300W. With the input fully saturated, the arithmetic is about 2 hours to fill the DELTA 2 and about 3 hours for the Mini, before losses. Real panel output is usually below rating, so expect longer.
Which lasts longer?
EcoFlow rates the DELTA 2’s LFP battery for 3,000 cycles to 80%+ capacity and the Mini’s NCM battery for 800. Cycled daily, that is about 8 years against a little over 2 years. EcoFlow’s warranty follows the same pattern: 5 years against 24 months.
Are the DELTA Mini and DELTA 2 still sold?
On 2026-10-06 EcoFlow’s US store showed the DELTA Mini as sold out and a pre-order item, and its DELTA 2 product link redirected to the DELTA 3. EcoFlow does not state that either is discontinued.
Bottom Line
The DELTA Mini and DELTA 2 are close in size and weight, and nearly identical in energy per pound. The DELTA 2 wins on paper almost everywhere else: LFP chemistry with a 3,000-cycle rating, 1,800W continuous output, 500W solar input, an expansion battery option and a 5-year warranty. The Mini only makes sense as a lower-cost option for light, occasional use, and only if you can still find one.
