Product Review · Updated November 2026
EcoFlow DELTA 3 Ultra & Ultra Plus Review: 3kWh of 120V Home Backup
The EcoFlow DELTA 3 Ultra is a 3,072Wh LFP power station with 3,600W of 120V output (7,200W surge). It comes in two versions. The base Ultra takes 800W of solar and cannot be expanded. The Ultra Plus doubles solar to 1,600W and grows to 11kWh with extra batteries. On Amazon, the Ultra Plus is the model sold on its own, so it is the one we rate here.
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By Morgan Chen
Reviewed & approved by Juhi Sahni
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Published: 2026-11-07
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Updated:
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Editorial Standards
DELTA 3 Ultra Plus
Capacity
3,072
Watt-hours (LFP)
AC Output
3,600
Watts (7,200W surge)
Weight
74.3
Pounds
Solar Input
1,600
Watts max (2 inputs)
Want the base Ultra? Amazon lists it only as a bundle with two 220W panels. See what differs.
DELTA 3 Ultra vs. DELTA 3 Ultra Plus: What the Plus Adds
Both models share the same battery and inverter: 3,072Wh (51.2V, 60Ah), 3,600W continuous, 7,200W surge, X-Boost up to 4,600W for resistive loads, 1,800W of AC charging and a UPS switchover under 10ms (EcoFlow DELTA 3 Ultra FAQ). They are separate models, not trims of one listing. Amazon lists the base Ultra as model EF-DL-H01-3U and the Ultra Plus as EF-DL-H02-3UP. The differences are solar input, expansion, a few ports and 1 kg of weight:
| Spec | DELTA 3 Ultra (base) | DELTA 3 Ultra Plus |
|---|---|---|
| Capacity / output | 3,072 Wh · 3,600W / 7,200W surge | 3,072 Wh · 3,600W / 7,200W surge |
| Solar input | 800W | 1,600W (2 XT60 inputs, 11–60V) |
| Expansion | None | 3–11 kWh with extra batteries (see expansion) |
| Car charging (EcoFlow FAQ) | Up to 720W (XT60) | Up to 1,000W |
| Generator charging (EcoFlow FAQ) | Up to 1,800W | Up to 3,200W (EcoFlow Smart Generator) |
| Outlets | 10 (no Anderson port) | 11 (adds a 12V Anderson port) |
| Weight | 72.1 lb (32.7 kg) | 74.3 lb (33.7 kg) |
| Amazon listing | Bundle with 2× 220W panels only | Standalone unit |
| Price | Check price at Amazon → (with panels) | Check price at Amazon → |
Sources: EcoFlow’s DELTA 3 Ultra FAQ (all rows; car and generator charging rates are EcoFlow-only figures), StorageReview and Digital Trends (Ultra Plus solar, weight, expansion), Power Station Arena (base Ultra 800W solar, 72.1 lb, no expansion) and both Amazon listings.
Solar and expansion are the two upgrades that matter. Digital Trends calls expansion “the biggest upgrade over the original DELTA 3 Ultra” and notes the Plus doubles its solar input. For outage use, doubling solar halves the time to refill from panels: about 2.6 hours of strong sun on the Plus against about 5 hours on the base Ultra (see charging). The base Ultra is fine if you will run it mostly from the wall and never add a battery. Because Amazon sells it only with two 220W panels, compare that bundle with the Ultra Plus plus panels of your own choosing.
Base DELTA 3 Ultra + two 220W panels
The only base-Ultra listing we found on Amazon. EcoFlow ships the station and panels in separate packages, per the listing. We don’t give the bundle its own score because the panel price makes its value impossible to compare with standalone stations.
DELTA 3 Ultra Is Not the DELTA Pro Ultra
The names are close, but these are different products. The DELTA 3 Ultra is a single-box, 120V portable station. The DELTA Pro Ultra is EcoFlow’s modular whole-home system: a separate inverter with 7,200W of 120/240V output on 6,144Wh battery modules, 5,600W of solar input and expansion to 90kWh, at about 182 lb for one inverter plus one battery. If you need 240V circuits or a panel-integrated system, read our EcoFlow DELTA Pro Ultra review instead.
DELTA 3 Ultra Plus Expansion: How Far It Really Goes
EcoFlow advertises “3–11kWh.” Its FAQ says the Ultra Plus has one extra-battery port, expandable to two. The footnotes on its Ultra Plus product page say the two-battery setups need a Smart Extra Battery Expansion Adapter, which EcoFlow lists as coming soon. Compatible batteries are the 2,048Wh DELTA 3 Max Plus Smart Extra Battery and the 4,096Wh DELTA Pro 3 Smart Extra Battery (EcoFlow; StorageReview). So the battery you choose and the adapter set your ceiling:
| Setup | Total capacity | Usable (~85%) |
|---|---|---|
| Ultra Plus alone | 3,072 Wh | ~2,611 Wh |
| + 1 DELTA 3 Max Plus Extra Battery (2,048Wh) | 5,120 Wh | ~4,352 Wh |
| + 1 DELTA Pro 3 Smart Extra Battery (4,096Wh) | 7,168 Wh | ~6,093 Wh |
| + 2 DELTA 3 Max Plus Extra Batteries (adapter required) | 7,168 Wh | ~6,093 Wh |
| + 2 DELTA Pro 3 Smart Extra Batteries (adapter required) | 11,264 Wh | ~9,574 Wh |
The 11kWh headline needs two DELTA Pro 3 batteries and the unreleased adapter. Without the adapter, the realistic ceiling today is about 7.2kWh with one DELTA Pro 3 battery. The same DELTA 3 Max Plus extra battery works with the Delta 3 Max Plus and, per its listing, the DELTA 3800 Gen4. Check EcoFlow’s current compatibility notes before you buy a second battery.
DELTA 3 Ultra Plus vs. DELTA Gen4, Delta Pro 3 and Delta 3 Max Plus
Specs come from our product database. Current prices come from Amazon. Scores are from our scoring, built from published specs and prices.
| Generator | Capacity | Output | Solar In | Weight | Expands | Score | Price | Amazon |
|---|---|---|---|---|---|---|---|---|
| ★ EcoFlow DELTA 3 Ultra Plus | 3,072 Wh | 3,600W | 1,600W | 74.3 lb | To 11 kWh | 88/100 | Check price at Amazon → | View → |
| EcoFlow DELTA 3000 Gen4 | 3,072 Wh | 3,600W | 1,000W | 57.3 lb | No | 87/100 | Check price at Amazon → | View → |
| EcoFlow DELTA 3800 Gen4 | 3,763 Wh | 3,600W | 2,000W | 67.5 lb | To 12 kWh | 89/100 | $2,199.00 | View → |
| EcoFlow Delta Pro 3 | 4,096 Wh | 4,000W | 2,600W | 113.5 lb | To 12 kWh per unit | 95/100 | Check price at Amazon → | View → |
| EcoFlow Delta 3 Max Plus | 2,048 Wh | 3,000W | 1,000W | 48.7 lb | To 10 kWh | 87/100 | $1,149.00 | View → |
For the whole EcoFlow lineup, see Which EcoFlow DELTA should I buy? For other brands at this inverter size, see our best 3000-watt solar generators roundup.
DELTA 3 Ultra vs. DELTA 3000 Gen4 and 3800 Gen4
EcoFlow’s DELTA Gen4 series, announced for the US on November 4, 2026, lands right on top of the Ultra. The DELTA 3000 Gen4 has the same 3,072Wh and 3,600W inverter at 57.3 lb, 17 lb lighter than the Ultra Plus. It takes only 1,000W of solar on one input and cannot be expanded, so on paper it is a lighter base Ultra rather than an Ultra Plus rival.
The DELTA 3800 Gen4 is the real competitor. It has 3,763Wh, 2,000W of solar over two inputs and expansion to 12kWh with the same DELTA Pro 3 and DELTA 3 Max Plus batteries, at 67.5 lb. That beats the Ultra Plus on capacity, solar input and weight. The Ultra Plus is the better buy only when its current price is clearly lower, so compare the live prices in the table above. Its strengths are a published TT-30R RV outlet and a 12V Anderson port, plus spec details that have been in independent coverage since mid-2026. The Gen4 launched this week.
DELTA 3 Ultra Plus vs. Delta Pro 3
The Delta Pro 3 is a step up in every direction except weight. It has 4,096Wh, 4,000W of output with 120V and 240V, and 2,600W of solar. It also weighs 113.5 lb, about 39 lb more than the Ultra Plus. The deciding question is 240V. The Ultra Plus is 120V only. Digital Trends notes it “does not support 240V output or split-phase pairing.” If you have a 240V well pump, dryer or split-phase panel circuit to back up, get the Delta Pro 3. If every load you care about is on 120V, the Ultra Plus covers it at about two-thirds of the weight. Both accept the DELTA Pro 3 Smart Extra Battery.
Pros & Cons (DELTA 3 Ultra Plus)
Pros
- ✓ 3,600W continuous / 7,200W surge for compressors and pumps
- ✓ 1,600W of solar across two inputs, double the base Ultra
- ✓ Expands with DELTA 3 Max Plus or DELTA Pro 3 batteries
- ✓ TT-30R 30A RV outlet plus four 20A outlets
- ✓ UPS switchover under 10ms; StorageReview reported 8.25ms
- ✓ EcoFlow rates it at 25dB or less at 1 m under a 600W load
Cons
- ✗ 74.3 lb, heavier than either DELTA Gen4 model
- ✗ 120V only; no 240V or split-phase pairing
- ✗ A second extra battery needs an adapter EcoFlow has not released
- ✗ No published cycle count (EcoFlow gives an estimated 10-year life)
- ✗ The full 5-year warranty requires registration (3 years base)
Real-World Runtime: How Long Will It Last?
Plan on about 85% of the rated capacity reaching your devices after inverter losses. That is roughly 2,611Wh for either Ultra model on its own, and about 6,093Wh for an Ultra Plus with one DELTA Pro 3 extra battery. Runtime = usable Wh ÷ load. These are planning estimates, not measurements.
| Typical load | Approx. draw | Ultra / Ultra Plus | Ultra Plus + DP3 battery |
|---|---|---|---|
| Fridge (averaged over its on/off cycle) | 60 W | ~44 hours | ~102 hours |
| Fridge + router + LED lights + phones | 300 W | ~8.7 hours | ~20 hours |
| Fridge + freezer + CPAP + fans | 500 W | ~5.2 hours | ~12 hours |
| Furnace blower + fridge + small appliances | 1,000 W | ~2.6 hours | ~6.1 hours |
| Microwave + fridge + coffee maker | 2,000 W | ~1.3 hours | ~3.0 hours |
| Maximum continuous output | 3,600 W | ~44 minutes | ~1.7 hours |
Digital Trends reported about 2,610Wh of delivered energy from the Ultra Plus in its own run, close to our 85% planning figure. To size your own load, use the solar size calculator.
Charging & Solar Input
| Source | Published figure | Notes |
|---|---|---|
| AC wall (both) | 1,800W; 0–80% in about 1.5 h, 0–100% in 120 min | EcoFlow FAQ (91 min to 80%); Digital Trends gives about 89 min |
| Solar (Ultra Plus) | 1,600W, two XT60 inputs | 11–60V per input (StorageReview); 2× 800W (Digital Trends) |
| Solar (base Ultra) | 800W | EcoFlow FAQ; Power Station Arena |
| Car alternator | Up to 1,000W (Plus) / 720W (Ultra) | EcoFlow FAQ figures; we found no second source |
| Generator | Up to 3,200W (Plus) / 1,800W (Ultra) | EcoFlow FAQ; the 3,200W rate is with EcoFlow’s Smart Generator 4000 |
What the solar figures mean in practice: panels rarely deliver their full rating, so plan on about 75%. On the Ultra Plus, 1,600W of panels is worth roughly 1,200W, or about 2.6 hours of strong sun to refill 3,072Wh. On the base Ultra, 800W of panels gives roughly 600W, or about 5 hours. A 60V input limit also caps how many panels you can wire in series. Panel open-circuit voltage rises in cold weather, so check each panel’s Voc before stringing two together. Our EcoFlow power station guide covers EcoFlow’s panel options.
Who Should Buy the DELTA 3 Ultra Plus — and Who Shouldn't
Buy it if you…
- ✓ Want about 1.8 days of fridge-only backup, or a long evening of fridge, router and lights, on 120V
- ✓ Have an RV with a 30A inlet. The TT-30R outlet plugs straight in
- ✓ Plan to add solar. 1,600W over two inputs refills it in an afternoon of strong sun
- ✓ Keep a desk or router on it full time. The sub-10ms UPS suits that (see power station vs. UPS)
Skip it if you…
- ✗ Need 240V for a well pump, dryer circuit or split-phase panel — get the Delta Pro 3
- ✗ Will move it often — the DELTA 3000 Gen4 has the same capacity at 57.3 lb
- ✗ Want expansion now without waiting for an adapter — compare the DELTA 3800 Gen4 above
- ✗ Plan to wire it into your home panel — EcoFlow lists a manual transfer switch and inlet box for it, so read our transfer switch guide first
Full Specifications (DELTA 3 Ultra Plus)
| Battery capacity | 3,072 Wh (LFP, 51.2V 60Ah) |
| AC output | 3,600W continuous · 7,200W surge · X-Boost to 4,600W (EcoFlow) |
| Output voltage | 120V only |
| AC outlets | 4× NEMA 5-20R (20A) + 1× TT-30R (30A) |
| USB / DC | 1× USB-C 140W, 2× USB-C 45W, 1× USB-A; 12V car socket and 12V Anderson port (378W shared) |
| Solar input | 1,600W, two XT60 inputs (11–60V) |
| AC charging | 1,800W; 0–100% in 120 min (EcoFlow) |
| Expandability | 3–11 kWh; two batteries need EcoFlow’s expansion adapter (listed as coming soon) |
| UPS switchover | <10 ms rated |
| Weight | 74.3 lb (33.7 kg) |
| Dimensions | 24.1 × 12.9 × 15.5 in (613 × 328 × 395 mm) |
| Noise | ≤25 dB at 1 m, 600W load (EcoFlow) |
| Warranty | 3 years, plus 2 years on registration in the EcoFlow app |
EcoFlow publishes no cycle count for either Ultra model, only an estimated 10-year lifespan, so we omit it. We could not confirm base-Ultra dimensions from two sources, so they are omitted too. The USB-A rating differs within StorageReview’s own coverage (15W vs. 18W), so we list the port without a figure.
Verdict
Buy the Ultra Plus, not the base Ultra, and only after checking the DELTA 3800 Gen4 price.
The Ultra Plus is a strong 120V home-backup station. It has 3,072Wh, a 3,600W inverter, a 30A RV outlet, 1,600W of solar and a real expansion path. In our scoring it rates 88/100, a score built from published specs and the current Amazon price. The base Ultra has half the solar and no expansion for about 2 lb less, and Amazon sells it only with panels. The newer DELTA 3800 Gen4 (89/100 in our scoring) beats the Ultra Plus on paper, so the Ultra Plus is the pick when it costs less.
Sources & Data Verification
We do not physically test units. This review synthesizes manufacturer specs, published third-party reviews and the Amazon listings. Runtime figures are planning estimates. Specs we could not confirm from at least two independent sources are labeled or omitted. Read more on our Editorial Standards page.
- • EcoFlow — DELTA 3 Ultra FAQ (both models: capacity, output, solar, charging, weight, outlets, expansion, warranty)
- • EcoFlow — DELTA 3 Ultra Plus product page (expansion footnotes, adapter, TT-30R, noise)
- • StorageReview — DELTA 3 Max Plus and Ultra Plus review (ports, solar inputs, weight, dimensions, UPS, warranty)
- • Digital Trends — EcoFlow DELTA 3 Ultra Plus review (July 1, 2026)
- • Power Station Arena — DELTA 3 Ultra spec table (base Ultra solar, weight, outlets, expansion)
- • Amazon listings for the DELTA 3 Ultra Plus and the DELTA 3 Ultra + panel bundle (titles, model numbers, bullets)
Frequently Asked Questions
What is the difference between the EcoFlow DELTA 3 Ultra and the Ultra Plus?
Both have 3,072Wh of LFP capacity, a 3,600W inverter with 7,200W surge, 1,800W AC charging and a UPS under 10ms. The Ultra Plus doubles solar input to 1,600W across two inputs, expands to 11kWh with extra batteries, adds a 12V Anderson port and faster car and generator charging, and weighs 74.3 lb against 72.1 lb. The base Ultra takes 800W of solar and cannot be expanded.
Is the EcoFlow DELTA 3 Ultra expandable?
The base DELTA 3 Ultra is not. The DELTA 3 Ultra Plus is: it takes DELTA 3 Max Plus (2,048Wh) or DELTA Pro 3 (4,096Wh) Smart Extra Batteries. One battery connects directly. Two need EcoFlow’s Smart Extra Battery Expansion Adapter, which EcoFlow lists as coming soon. The 11kWh maximum needs two DELTA Pro 3 batteries.
Can I buy the base DELTA 3 Ultra on Amazon?
When we checked in November 2026, Amazon listed the base DELTA 3 Ultra only in a bundle with two 220W solar panels. The DELTA 3 Ultra Plus is listed as a standalone unit, which is why this review rates the Ultra Plus.
Is the DELTA 3 Ultra the same as the DELTA Pro Ultra?
No. The DELTA 3 Ultra is a single-box 3,072Wh station with 120V output. The DELTA Pro Ultra is EcoFlow’s modular whole-home system with a separate 7,200W 120/240V inverter and 6,144Wh battery modules that scale to 90kWh.
Should I buy the DELTA 3 Ultra Plus or the DELTA 3800 Gen4?
On published specs, the DELTA 3800 Gen4 has more capacity (3,763Wh), more solar input (2,000W) and expansion to 12kWh, and it weighs 67.5 lb against the Ultra Plus’s 74.3 lb. Both have a 3,600W inverter. The Ultra Plus makes sense when its current price is clearly lower.
Does the DELTA 3 Ultra Plus support 240V?
No. It is 120V only, with four 20A outlets and one TT-30R 30A outlet, and Digital Trends notes it does not support split-phase pairing. For 240V loads, EcoFlow’s portable option is the Delta Pro 3.