Evoy reveals Storm, its 300hp inboard electric motor

The new drive system, which shares the same name as Evoy’s 300hp outboard motor, can produce 300hp of continuous power and is optimised to push boats between 6.0 and 10.6 metres in length up onto the plane, as well as push slower full-displacement hulls through the water.

Fit two of them, and you can power a boat ranging from between 9.0 metres right up to 14.0 metres.

Evoy chief executive Leif Stavøstrand said the release of the Storm inboard motor was a significant milestone for the company, filling a big gap in the market.

“Since the beginning of Evoy, there has been a big ask for this size, so we are excited to have it available,” Stavøstrand said.

“Since it fits in both smaller planing hull boats and larger displacement boats, this is a true gamechanger, where we allow a whole new segment of boaters to go fossil fuel-free and enjoy the silence of irresistible boating.”

The Evoy Storm inboard engine uses 800-volt battery technology to handle the higher power demand of the system; a 120hp version called the Breeze launched alongside the Storm uses only a 400-volt system.

The liquid-cooled battery system developed for the Storm can recharge on the 20kW shore power system commonly found in marinas worldwide, with a top-up charge from empty to 80 percent taking around 45 minutes.

Storm is designed as a plug-and-play system, meaning you can fit it to a boat and then add a fly-by-wire throttle and shift system.

The inboard version of the Storm is slightly cheaper than the outboard version, and weighs 278kg on its own, with cables, accessories and the motor’s cooling fluid adding around another 90kg. Batteries will add more weight.

According to Evoy, the new Storm motor should be good for around 19 nautical miles of range at 25 knots of speed over the ground, a slightly further reach than the outboard version.

Three different batteries will be available, including a 126kWh system that will cost slightly more than the motor to buy, a 252kWh long-range version that costs around twice as much as the motor, and a 378kWh extra long-range version costing about 3.5 times the price of the motor.

The motor comes standard with a 10.0-inch touchscreen for monitoring motor data and battery health, with the option to step up to a 16.0-inch version. You can order two of them for multi-motor installations.

Of note, Evoy has also introduced the option of a battery range-extender comprising a genset of up to 20kVA that can run on diesel, petrol, ethanol or even hydrogen.

The Evoy Storm inboard motor will be available next year.