Verdict
All guidesResearchOpen dataMethodologyAboutContact
Head-to-head · Best Portable Generators

EcoFlow Delta 2 Max 2048Wh Power Station vs Yamaha EF2200iS Inverter Generator

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

Verdict is reader-supported. As an Amazon Associate we earn from qualifying purchases. Some links on this page are affiliate links — if you click through and buy, we may earn a small commission at no extra cost to you. Our ratings are sourced from independent publications, not sponsors.
The short answer

EcoFlow Delta 2 Max 2048Wh Power Station and Yamaha EF2200iS Inverter Generator score essentially the same (4.5 vs 4.5). Pick the one whose trade-offs match your priorities — the strengths and watch-outs below are where they actually differ.

EcoFlow Delta 2 Max 2048Wh Power Station
Ranked #2 in Best Portable Generators
EcoFlow Delta 2 Max 2048Wh Power Station
2 sources$1,029as of Oct 18

Digital Trends's Nick Mokey concluded: 'If you're buying for the long haul, there's no better option than the EcoFlow Delta 2 Max,' and Bob Vila scored it 9.4/10 for adaptability. It runs with zero emissions, is safe indoors, charges to 80% in 1.1 hours, and its LFP battery is rated for 10 years of daily use. The right pick for short multi-hour outages and for indoor backup where gas generators can't go.

Strengths
  • — LFP (LiFePO4) battery chemistry rated for 3,000 cycles to 80% — roughly 10 years of daily use
  • — Charges to 80% in 1.1 hours on AC alone, or 43 minutes with simultaneous AC plus 1,000W solar
  • — Expandable to 6,144Wh with two Smart Extra Batteries for multi-day off-grid use
Watch-outs
  • — $1,899 MSRP is steep for 2kWh of capacity — a full-size refrigerator runs only 14 hours per charge
$1,029 · Check Price on AmazonFull review →
Yamaha EF2200iS Inverter Generator
Ranked #3 in Best Portable Generators
Yamaha EF2200iS Inverter Generator
3 sourcesall derived$1,284.96as of Oct 19

The Yamaha EF2200iS is a 79cc gasoline inverter generator rated at 2,200 peak and 1,800 running watts, weighing 55.2 pounds. Bob Vila named it its best inverter pick, measuring 71 dB at 5 feet and praising its tri-handle carry and fuel economy; Field & Stream, whose writer has used one for years, picked it as its best portable model; and RV Daily ran a caravan air-conditioner from it without trouble. Its limits are output and the RV outlet, which only gives full 30-amp service when two units are paralleled. It suits campers, caravanners and tailgaters who want quiet, clean power; anyone needing to back up major home circuits should look at a larger generator.

Strengths
  • — Quiet running: Bob Vila measured 71 dB at 5 feet, and Field & Stream likens low load to a fan
  • — Ran a caravan air-conditioner plus device charging in RV Daily's test without overloading
  • — Three-handle frame makes it easy to carry with one or two hands
Watch-outs
  • — The 30A RV outlet only delivers full output when two units run in parallel
  • — Rated at 1,800 running watts, so it is sized for camps and RVs, not a whole house
$1,284.96 · Check Price on AmazonFull review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

EcoFlow Delta 2 Max 2048Wh Power Station

The only battery-powered pick in this category. The Honda EU2200i, DuroMax XP12000EH and WEN 56235i are all fuel-burning generators, while the EcoFlow Delta 2 Max produces zero emissions and can run in basements, garages and apartments. It suits short outages, since a full-size refrigerator runs about 14 hours per charge, and at 50 lbs it is heavier than the 39 lb WEN and far lighter than the 224 lb DuroMax.

Yamaha EF2200iS Inverter Generator

In Bob Vila's comparison table the EF2200iS matches the Honda EU2200i at 1,800 running and 2,200 peak watts, but weighs 55.2 pounds against the Honda's 47.4 and adds a 30A RV outlet and a 12V DC socket. Unlike the battery-based EcoFlow Delta 2 Max, it runs on gasoline and needs refuelling rather than recharging.

Specs side-by-side

SpecEcoFlow Delta 2 Max 2048Wh Power StationYamaha EF2200iS Inverter Generator
Battery Capacity2,048 Wh—
AC Output2,400W continuous, 3,400W X-Boost—
Surge Power4,800W—
Fuel TypeBattery (LFP/LiFePO4)—
Charge Time (AC)1.1 hours to 80%—
Cycle Life3,000 cycles to 80%—
Outlets6x 120V AC, 4x USB-A, 2x 100W USB-C, 1x 12V DCTwo 120V-20A, one 120V-30A, one 12V DC
Weight50 lbs55.2 lb
Solar InputUp to 1,000W—
ExpandableUp to 6,144 Wh—
Warranty5-year limited—
Voltage120 volts120 volts
Wattage2048 watt-hours2200 watts
Peak Output—2,200 W
Running Output—1,800 W
Engine—79cc
Fuel—Gasoline
Fuel Tank—4.7 L
Dimensions—555 x 300 x 470 mm
← See the full ranking of best portable generators