Disclosure: As an Amazon Associate I earn from qualifying purchases. This review is based on EcoFlow’s published specifications. We have not physically tested this unit. See our affiliate disclosure.
EcoFlow DELTA 2 Max review: quick verdict
Best for: backup power for essentials such as a refrigerator, router and lights, plus RV trips and camping.
Not for: running a whole house or large loads such as central air conditioning.
Keep in mind: it weighs 50 lb (23 kg), so it is portable but heavy.
Specifications (per EcoFlow)
| Item | Specification |
|---|---|
| Capacity | 2048Wh |
| Battery chemistry | LFP (LiFePO4) |
| Cycle life | 3000 cycles to 80%+ capacity |
| AC output | 6 outlets, 2400W total, 4800W surge |
| X-Boost | Up to 3400W |
| USB-C | 2 ports, 100W max each |
| USB-A | 2 ports at 12W, 2 fast charge ports at 18W |
| Car power output | 1 port, 12.6V, 10A, 126W |
| DC5521 output | 2 ports, 12.6V, 3A, 38W each |
| AC charging | Up to 1800W, 15A |
| Solar charging | 11-60V, 15A; 500W per port, 1000W with two ports |
| Car charging | 12V / 24V battery, 8A |
| Expansion | Up to two extra batteries, 6144Wh total |
| Connectivity | Wi-Fi and Bluetooth |
| Dimensions | 497 x 242 x 305 mm (19.6 x 9.5 x 12 in) |
| Weight | 50 lb (23 kg) |
| Warranty | 5 years (EcoFlow) |
What 2048Wh means in practice
Watt hours tell you how much energy is stored. Divide the capacity by the power your appliance draws to get a rough run time, then allow for inverter losses. As an engineering estimate, a steady 100W load could run for roughly 17 hours if about 85% of the stored energy reaches the appliance. A refrigerator cycles on and off, so its average draw is lower than its nameplate figure. These are estimates, not test results.
AC power: six outlets and 2400W
The rear panel has six AC outlets sharing 2400W of continuous output, with a 4800W surge rating for motor start-up. EcoFlow also lists an X-Boost mode of up to 3400W for certain appliances. In plain terms, it can run a fridge, a microwave or power tools one or two at a time, within the 2400W limit.
Ports for small devices
The front panel has two 100W USB-C ports, which is enough for most laptops, two 12W USB-A ports and two 18W fast charge USB-A ports. The rear also has a 126W car socket and two DC5521 barrel outputs.
Charging: wall, solar and car
Wall charging is listed at up to 1800W. Solar input is up to 1000W across two ports at 11-60V and 15A, and EcoFlow says a full solar charge can take as little as 2.3 hours in ideal conditions. It can also charge from a 12V or 24V vehicle battery at 8A. Real solar charging time depends on your panels, the season and the weather.
LFP battery and expansion
Lithium iron phosphate cells trade some weight for long cycle life and good thermal stability. EcoFlow rates this pack for 3000 cycles to 80% or more of its original capacity. If you need more energy, two extra batteries bring the total to 6144Wh.
Pros and cons
Pros
- 2048Wh LFP battery with a 3000-cycle rating
- Six AC outlets and 2400W output
- Two 100W USB-C ports
- Fast wall charging and up to 1000W of solar input
- Expandable to 6144Wh
- 5-year manufacturer warranty
Cons
- Heavy at 50 lb (23 kg)
- Not a whole-home solution
- Extra batteries and solar panels cost more
Final recommendation
On paper, the EcoFlow DELTA 2 Max is a well-balanced 2kWh-class power station for essential home backup and RV use. Check the current price and what is included in the box before you buy.
Check the current price on Amazon
Amazon affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Prices and availability are accurate only at the time you view them on Amazon and can change. We did not test this product; specifications are from the manufacturer.
Mr. Jahangir Alam is an Electrical & Electronics Engineer with a wide range of experience in several fields of Engineering. He finds engineering articles to be very interesting, and that is why he likes to write them. To know more about him, please click here.