Anker’s SOLIX F3000 and EcoFlow’s DELTA 3 Ultra look like twins on paper: 3,072Wh of LiFePO4 each, a 3,600W inverter, 7,200W surge and a TT-30 RV outlet. The spec sheets split on everything else. Anker lists up to 2,400W of solar input and expansion to 12,288Wh. EcoFlow lists 800W of solar, no expansion on the base Ultra, a UPS switchover under 10 ms, and a unit that’s about 19 lb lighter. On Oct. 17, 2026, EcoFlow’s U.S. store listed the DELTA 3 Ultra at $1,349, and Anker’s store listed the F3000 at $1,499.99. Here’s how to pick between them.
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Specs come from Anker’s F3000 product page and EcoFlow’s DELTA 3 Ultra product page. I own an EcoFlow DELTA 3 Max but haven’t tested either of these two models, so runtimes and charge times marked as estimates are my math.
Quick verdict
| If you want… | Pick |
|---|---|
| Lots of solar and room to grow | Anker SOLIX F3000 |
| 240V for a well pump or panel via a second unit | Anker SOLIX F3000 |
| Faster AC recharging from a 30A RV outlet | Anker SOLIX F3000 (3,600W via TT-30 cable) |
| A lighter unit with the fastest UPS switchover | EcoFlow DELTA 3 Ultra |
| Quiet operation in a bedroom or office | EcoFlow DELTA 3 Ultra (≤25 dB at 600W, per EcoFlow) |
| The lower price for 3kWh | EcoFlow DELTA 3 Ultra |
Specs side by side
| Spec | Anker SOLIX F3000 | EcoFlow DELTA 3 Ultra |
|---|---|---|
| Capacity | 3,072Wh LFP (51.2V, 60Ah) | 3,072Wh LFP (51.2V, 60Ah) |
| Cycle life | 4,000 cycles | Not listed in the spec table |
| AC output | 3,600W total; 7,200W surge; SurgePad 4,860W | 3,600W total; 7,200W surge; X-Boost 4,600W |
| AC outlets | 4 × NEMA 5-20R (2,400W max each) + TT-30R (3,600W) | 4 × 20A + 1 × 30A (TT-30) |
| USB-C | 100W per port | 1 × 140W + 2 × 45W shared |
| USB-A | 12W per port | 1 × 18W |
| 12V DC | Car socket 12V/10A + Anderson 13.4V/30A | Car socket 12.6V/10A (126W) |
| AC charging | 1,800W (standard cable); 3,600W via TT-30 cable + EV adapter | 1,800W, 15A |
| Solar | 2,400W: High-PV 11–165V/17A (1,600W) + Low-PV 11–60V/17A (800W) | 800W max |
| Other charging | DC input 60V/120A max | Generator (1,600W listed), alternator charger |
| Expansion | Up to 12,288Wh (3 × BP3000) | Not expandable (the Ultra Plus is) |
| 240V | Two units + Double Voltage Hub, 7,200W | No |
| UPS | 20 ms | <10 ms |
| Noise (maker) | Not listed | ≤25 dB at 600W (1 m, 25°C) |
| Size | 25.6 × 11.8 × 14.8 in | 625.99 × 327.71 × 394.95 mm (about 24.6 × 12.9 × 15.5 in) |
| Weight | 91.5 lb (41.5 kg), with wheels and pull rod | 32.7 kg (about 72 lb) |
| Charge / discharge temp | 32–104°F / -4–104°F | 32–113°F / 14–113°F |
| Warranty | 5 years | Up to 5 years (3 standard + 2 with app registration) |
| Price (maker store, Oct. 17, 2026) | $1,499.99 | $1,349 (sale; $1,599 regular) |
Capacity and runtime: a tie
Both use the same 51.2V, 60Ah LFP pack, so runtimes come out nearly the same. Using about 85% of rated capacity as usable AC energy (my assumption for inverter losses and reserve), each gives roughly 2,600Wh:
| Load | Assumed draw | Estimated runtime (either unit) |
|---|---|---|
| Refrigerator (cycling average) | 150W | ~17 h |
| CPAP, no humidifier | 40W | ~65 h |
| Router + modem + laptop | 80W | ~33 h |
| Window AC, 8,000 BTU | 700W | ~3.7 h |
| Sump pump while running | 800W | ~3.3 h of pumping |
Look up your own appliance numbers in our refrigerator watts guide, and check motor loads against surge watts vs running watts. Both units list 7,200W surge, so startup headroom is the same.
SurgePad vs X-Boost
Both brands have a mode for running resistive loads above the rated output by lowering voltage. Anker calls it SurgePad (4,860W) and EcoFlow calls it X-Boost (4,600W). EcoFlow lists clothing steamers, electric dryers and electric frying pans as examples. Either way, it’s for heaters and heating elements, not motors.
The EcoFlow app side: OASIS, Self-Powered Mode and schedules
EcoFlow puts a lot of its pitch for the DELTA 3 Ultra into software. Its product page describes an OASIS 3.0 dashboard in the EcoFlow app that shows real-time battery status, electricity prices and savings, plus a Self-Powered Mode and Scheduled Tasks meant to cut daily bills. Storm Guard Mode is the feature most backup buyers will notice: EcoFlow says it monitors severe weather alerts and starts AC charging remotely before a storm arrives. The app connects over Wi-Fi and Bluetooth.
That’s the same app I use with my EcoFlow Delta 3 Max, so the DELTA 3 Ultra should feel familiar to anyone already in EcoFlow’s lineup. EcoFlow also lists an “optimal operating temperature” of 68–86°F, a good reminder that indoor storage keeps any LFP station at its best. Anker’s app covers monitoring and settings too, but Anker’s F3000 page puts more emphasis on hardware: wheels, expansion and dual solar inputs.
Charging: the F3000’s biggest advantage
| Method | F3000 | DELTA 3 Ultra |
|---|---|---|
| Wall (15A) | 1,800W; ~2 h to full (est.) | 1,800W; 0–80% in 89 min (EcoFlow) |
| 30A outlet (RV pedestal, EV adapter) | 3,600W; ~1 h to full (est.) | Not listed |
| Solar, max | 2,400W; ~1.5 h of full input (est.) | 800W; ~4.5 h of full input (est.) |
| Solar, realistic day (≈5 peak sun hours, 75% of rating) | 2,400W array could refill it in one day | 800W array adds ~3kWh in a full day (est.) |
If solar is the main way you’ll recharge, the Anker’s two inputs matter. The High-PV input takes up to 165V, so you can run long series strings of residential panels with less current and thinner wire. Read series vs parallel wiring before you build a string, and keep the array’s cold-weather Voc under each input’s limit.
The DELTA 3 Ultra’s 800W solar limit is enough for weekend camping or topping up after an outage, but not for living off solar alone. EcoFlow’s answer for heavier charging is a generator or its alternator charger. Its product page lists generator charging at 1,600W for this model.
Backup power at home
Both connect to a home through a manual transfer switch or inlet box. EcoFlow sells this unit bundled with a 30A transfer switch, and Anker’s F3000 has a bi-directional inlet-box connection rated 1,800W. Our transfer switch vs interlock guide explains the options.
- UPS switchover: EcoFlow lists under 10 ms and says it keeps “critical devices like NAS systems and servers running smoothly.” Anker lists 20 ms. For a desktop PC or network storage, the shorter gap is safer.
- Room to grow: The Anker takes up to three BP3000 batteries for 12,288Wh, and two F3000s with Anker’s Double Voltage Hub give 240V at 7,200W. The base DELTA 3 Ultra has no expansion. EcoFlow’s spec table shows 11kWh scalability only for the DELTA 3 Ultra Plus.
- Weather automation: EcoFlow’s Storm Guard Mode watches for severe weather alerts and starts AC charging remotely ahead of a storm, according to EcoFlow.
RV use
Both have a TT-30 outlet for a 30A RV cord, and both cap total AC at 3,600W, the same as a 30A, 120V shore connection. The Anker adds two things RV owners will like: an Anderson 13.4V/30A DC port for the rig’s 12V side, and the ability to recharge at 3,600W from a campground’s 30A pedestal with Anker’s TT-30 cable. The DELTA 3 Ultra counters with lighter weight and EcoFlow’s alternator-charger option for charging while you drive. My EcoFlow 800W alternator charger setup guide covers how that works.
Size and handling
The Anker is the heavier of the two at 91.5 lb, but Anker builds in wheels and a pull rod, so you roll it rather than lift it. The DELTA 3 Ultra is about 72 lb with handles. That’s light enough for two people to lift easily, but it’s still not a one-hand carry. If it’ll live in a closet and only move during outages, the weight difference matters less than the wheels.
Which should you buy?
Choose the Anker SOLIX F3000 if you’ll charge from solar, want to add batteries later, or might want 240V with a second unit. It’s the more flexible system.
Choose the EcoFlow DELTA 3 Ultra if 3kWh is all you need, you charge mostly from the wall or a generator, and you value a quiet unit with a sub-10 ms UPS at a lower price. If you like the EcoFlow but want expansion, compare it with the Ultra Plus in our DELTA 3 Ultra Plus vs DELTA Pro guide. If you lean Anker but want something lighter, see our comparison of Anker’s 2.5kWh and 3kWh models.
Check the Anker SOLIX F3000 on Amazon or on Anker’s store. See the DELTA 3 Ultra on EcoFlow’s store.
The DELTA 3 Ultra is also on Amazon: EcoFlow DELTA 3 Ultra on Amazon.
FAQ
Is the Anker SOLIX F3000 or EcoFlow DELTA 3 Ultra bigger?
They hold the same 3,072Wh. The Anker is heavier (91.5 lb vs about 72 lb) but has wheels and a pull rod.
Which charges faster from solar?
The Anker, with up to 2,400W across two inputs. The DELTA 3 Ultra tops out at 800W.
Can I expand the DELTA 3 Ultra?
Not the base model, according to EcoFlow’s spec table. The DELTA 3 Ultra Plus supports up to 11kWh with two DELTA Pro 3 Extra Batteries.
Which has the faster UPS?
EcoFlow lists under 10 ms for the DELTA 3 Ultra. Anker lists 20 ms for the F3000.
Can either one give me 240V?
The Anker can, with two units and Anker’s Double Voltage Hub (7,200W at 240V). The DELTA 3 Ultra is 120V only.
Do both have a TT-30 RV outlet?
Yes. Both have a TT-30 port that delivers up to 3,600W.
Bottom line
Same battery, same inverter, different strengths. The Anker SOLIX F3000 is the system to grow into, with triple the solar input, expansion to 12kWh and a path to 240V. The EcoFlow DELTA 3 Ultra is the simpler, lighter, quieter 3kWh box with a faster UPS and a lower price on Oct. 17. Decide how you’ll recharge and whether you’ll ever need more than 3kWh, and the choice follows.