The EcoFlow River 3 Max delivers 572 watt-hours from a LiFePO4 battery and provides up to 600 watts of continuous power via three AC outlets, with a peak of up to 1,200 watts. This allows a battery-powered speaker to run for about 5 hours or a projector for about 1.5 hours, without a generator or engine noise. The unit consists of the River 3 Plus base unit and the attached EB300 extra battery, which connect via contact pins without the need for cables.

Prices by rental duration

All prices include VAT, no deposit required, and include all-risk insurance. The first day is the base price; each additional 24-hour day costs an extra €12.47.

How long the battery lasts

Capacity in watt-hours divided by power consumption in watts equals runtime in hours. Because the inverter consumes some of the energy, about 486 of the 572 watt-hours are actually available to your devices.

Reference values, calculated with approximately 85 percent usable capacity. Volume and ambient temperature significantly affect the results. You can calculate your own requirements using the power consumption calculator.

Technical specifications

Included in delivery: EcoFlow River 3 Max, AC charging cable, car charging cable, and quick-start guide.

Where the limit lies

600 watts of continuous power is the hard limit, and three types of devices typically fail here in practice. Fog machines draw many times their continuous power rating when heating up and are the most common mistake. Active subwoofers briefly require more in the bass range than the reserve can handle. And anything with a heating element—such as space heaters, kettles, or coffee machines—exceeds this limit anyway. Short power surges of up to 1,200 watts are covered by the inverter's reserve. For such setups, you need a power station with an output of at least 1,800 watts; you can find a selection in our mobile power supply section.

Comparison with similar models

The order is based on capacity, i.e., runtime. The model on this page is shown in bold.

At Renty, you can rent the EcoFlow River 3 Max without a security deposit, and all-risk insurance is included in the price. Self-pickup is free of charge; delivery with setup is available upon request.