How Many Times Can the EcoFlow River 2 Max Charge a 20V Power Tool Battery?
Updated 2026-10-17 · Yes
The EcoFlow River 2 Max can fully charge a 20V power tool battery about 3.8 times. A typical 20V power tool battery holds 100Wh, and charging it takes roughly 115Wh once losses are included.
The numbers
| Battery capacity | 512Wh (LFP) |
|---|---|
| Usable energy | 435Wh (85% via AC outlets) |
| Continuous AC output | 500W |
| Surge rating | 1000W |
| 20V power tool battery | 100Wh |
| Energy per charge | 115Wh |
| Full charges | 3.8 charges |
512Wh × 0.85 = 435Wh usable ÷ (100Wh × 1.15) = 3.8 charges
Station specs: source, checked 2026-10-17. See how we calculate runtime.
Adjust the numbers
Check the label on your 20V power tool battery and enter its real wattage.
Recharging with solar
The EcoFlow River 2 Max accepts up to 220W of solar input. In real conditions that harvests about 825Wh on a sunny day (5 peak-sun hours), or about 750Wh with one 200W panel.
Tips
- A 20V 5Ah pack (DeWalt, Milwaukee, Makita) stores about 100Wh.
- The EcoFlow River 2 Max uses LiFePO4 (LFP) cells, rated for thousands of cycles, so running it down daily won’t wear it out quickly.
Other power stations running a 20V power tool battery
| Power station | Capacity | Output | Charges | Verdict |
|---|---|---|---|---|
| Jackery Explorer 300 Plus | 288Wh | 300W | 2.1 charges | Yes |
| Goal Zero Yeti 500X | 505Wh | 300W | 3.7 charges | Yes |
| Anker 535 PowerHouse | 512Wh | 500W | 3.8 charges | Yes |
| DJI Power 500 | 512Wh | 1000W | 3.8 charges | Yes |
| Jackery Explorer 500 | 518Wh | 500W | 3.8 charges | Yes |
| EcoFlow River 2 Pro | 768Wh | 800W | 5.7 charges | Yes |
| Anker SOLIX C800 Plus | 768Wh | 1200W | 5.7 charges | Yes |
| Bluetti AC70 | 768Wh | 1000W | 5.7 charges | Yes |
FAQ
How long does the EcoFlow River 2 Max take to recharge with solar?
With its maximum 220W of solar input it refills in about 3.1 hours of strong sun. With a single 200W panel, expect about 3.4 hours of full sun.