RV & Van Life
Living and working from a vehicle, on solar and alternator charging
EcoFlow · Extra large
EcoFlow DELTA Pro 3 Specs, Price & Buyer Notes
4.10 kWh of storage, 4 kW of continuous AC output, listed at $3,699. That works out to $0.90 per watt-hour and 36.1 watt-hours per pound. Spec figures below are taken from EcoFlow’s own product page; WattPicks editors are deep-use experience reviewers, not a pretend third-party lab for every SKU.
4.10 kWh4 kW AC113.5 lbLiFePO44,000 cycles
from owners, collected by EcoFlow
More product images
Further photographs published by EcoFlow for this model. We use the manufacturer’s own product imagery rather than stock photography, so what you see is the actual unit.
What this unit is for
An energy-technology company first and an outdoor brand second: the pitch is a smart, expandable energy ecosystem rather than a single box.
Best suited to: Buyers who want one system to grow from camping into home backup. Less suited to: Buyers who want the lowest cost per watt-hour and will never use an app.
Multi-day backup, off-grid and whole-home loads.
Where to buy
A tracked retailer link appears here only when we have a resolved offer for this model. We do not send readers to a manufacturer store page we cannot attribute.
Safety: lithium power stations store a lot of energy. Follow EcoFlow’s charge, ventilation, and storage instructions. WattPicks does not certify electrical installs.
Specifications
15 of 19 tracked specs are published by EcoFlow for this model. Missing specs stay “—” and are excluded from rankings rather than estimated. List price is commercial data in a separate table below ($3,699); it is not one of the 19 tracked keys.
| Rated Wh (nameplate) | 4.10 kWh |
|---|---|
| AC output (continuous) | 4 kW |
| AC surge | 8 kW |
| Power lifting / boost | — |
| Battery chemistry | LiFePO4 |
| Rated cycles | 4,000 |
| Weight | 113.5 lb |
| AC recharge to full | — |
| Max solar input | 2.6 kW |
| AC outlets | — |
| USB-C ports | 2 |
| USB-A ports | 2 |
| 12V car port | — |
| UPS switchover | 10 ms |
| Warranty | 60 months |
| Max expandable capacity | 48 kWh |
| Noise level | 30 dB |
| Ingress protection | IP65 |
| Operating temp (low) | 14 °F |
| List price | $3,699 |
|---|
Where these numbers come from. WattPicks does not test power stations — this is a spec profile, not a review. Every figure on this page is taken from EcoFlow’s own product listing and is stored with the vendor’s exact wording, reproduced below. We do not estimate missing specs — a field the vendor does not publish is shown as “—” and excluded from rankings. Source: us.ecoflow.com.
Vendor wording for each figure (15)
capacityWh: “Rated Capacity => 4096Wh”acOutputW: “AC Output => 120/240V~16.7A 60Hz, 4000W total”acSurgeW: “AC Surge Output => 8000W”chemistry: “Cell Chemistry => LFP”cycleLife: “Cycle Life => 4000 cycles to 80% capacity”weight: “Net Weight => 51.5kg (113.54 lb)”solarInputW: “2600W total, 2 ports”usbCPorts: “USB-C => 2 × 5/9/12/15/20V-5A, 100W Max per port, 200W total”usbAPorts: “USB-A => 2 × 5V-2.4A/9V-2A/12V-1.5A”upsSwitchoverMs: “Backup UPS 10ms”warrantyMonths: “Warranty => 5-year warranty”maxExpandableWh: “Expandable Capacity => 4–48 kWh”noiseDb: “*as low as 30 dB, thanks to our X-Quiet tech”ipRating: “IP65”operatingTempF: “Discharge temperature range: –10℃-45℃”
EcoFlow DELTA Pro 3 specs FAQ
What are the EcoFlow DELTA Pro 3 specs?
4.10 kWh capacity; 4 kW continuous AC; 8 kW surge; 113.5 lb; LiFePO4; listed at $3,699. 15 of 19 tracked specs are published by EcoFlow on the product page we read. List price is shown separately ($3,699).
How long does the EcoFlow DELTA Pro 3 last?
The vendor rates it for 4,000 cycles with LiFePO4 chemistry. Runtime on a given day is capacity divided by load (with inverter losses) — see our guide on how long a power station lasts.
Can the EcoFlow DELTA Pro 3 charge from solar?
Yes — EcoFlow publishes a maximum solar input of 2.6 kW. Ideal fill time is roughly capacity ÷ that input; real sun takes longer. See how long to charge with solar.
Is the EcoFlow DELTA Pro 3 good value?
At the published list price it works out to $0.90 per watt-hour. Compare that figure on our cost-per-watt-hour ranking rather than price alone.
Still sizing the purchase? How much capacity do I need · Solar charge time · Jackery vs EcoFlow vs BLUETTI
What owners say
All owner voices →4.80from 69 owner ratings
Rating only — no review text published
EcoFlow publishes an aggregate score of 4.80 from 69 owners, but does not expose the individual review text on its product page. We show the score and say so, rather than presenting a rating as if it came with testimony.
Where it ranks
Specs table →Position among all 120 power stations we track, in each dimension this unit publishes the inputs for.
| Dimension | Rank | Value |
|---|---|---|
| Best value (cost per watt-hour) | #40 of 51 | $0.90 |
| Most portable (Wh per pound) | #28 of 50 | 36.1 Wh/lb |
| Most inverter headroom | #44 of 51 | 98 W/100Wh |
| Highest solar input | #5 of 40 | 2.6 kW |
| Most expandable | #2 of 18 | 48 kWh |
| Longest service life | #2 of 42 | 16384 kWh |
| Most output per dollar | #45 of 51 | 1.08 W/$ |
| Best for home backup | #2 of 25 | 85/100 |
| Longest warranty | #7 of 51 | 60 mo |
| Quietest under load | #10 of 22 | 30 dB |
Who buys this brand, and why
All models →Who it is for
- Research-driven buyers who compare spec tables before they buy
- Van-lifers and RV owners building a system that can grow
- Homeowners who want a real backup plan, not just a camping box
- Creators and remote workers who need a UPS-grade desk setup
What they will pay extra for
- Fast charging over raw capacity
- A system that expands instead of being replaced
- App quality and firmware updates
- Breadth of accessories so every future need has a first-party answer
Honest drawbacks
- The ecosystem is the product — accessories are priced accordingly
- App dependency for features buyers may expect on the device
- Line-up churn means similar names differ a lot between generations
Fits these buying scenarios
All use cases →Off-Grid & DIY Solar
Cabins, sheds, job sites and self-built systems
Elsewhere in the EcoFlow range
All EcoFlow models →
Closest rivals by capacity
Other brands’ models nearest in capacity — the units a buyer is most likely to be comparing against this one.
Guides & compares mentioning this model
- EcoFlow DELTA Pro 3 Review: Home Backup Capacity & Expandability
- Anker SOLIX F3000 vs EcoFlow DELTA Pro 3: Home Backup Bet
- EcoFlow DELTA Pro 3 vs Goal Zero Yeti PRO 4000: Home Backup Showdown
- EcoFlow DELTA Pro 3 vs Jackery Explorer 5000 Plus
- Generac Solar Generator Alternatives: 3 Picks by Use Case
- Best Solar Generator for Off-Grid Living: 6 Ranked Picks