The eBeaver is a highly modified version of de Havilland's legendary DCH-2 Beaver, equipped with a 750 horsepower electric motor from Redmond, Washington-based Magnix. Harbour Air announced its partnership with Magnix earlier this year and said it planned to build the world's first "completely electric commercial seaplane fleet."

So far, electric planes have failed to make much of a dent. Quite a number have been built, tested and even sold, but none are close to being ready to take paying passengers. "This is real," Magnix CEO Roei Ganzarski told Fortune. "This is an airline flying their own aircraft."

Harbour currently has 14 six-passenger DHC-2 Beaver aircraft, many of which are equipped with Pratt & Whitney PT-6A turbine engines that burn about $300 worth of jet A fuel per hour. By contrast, the eBeaver packs enough battery life to fly about 100 miles at a cost of around $10 to $20 worth of electricity.

E-planes have a very limited range compared to ICE-powered models because lithium-ion batteries have less than 5 percent the energy density of gasoline or jet fuel. However, 100 miles is enough for many of the short seaplane hops around Vancouver's lower mainland. The distance between Vancouver and British Columbia capital Victoria (downtown to downtown) is 58 miles and takes about 30 minutes by plane, while the same trip on a ferry can run over four hours including driving time and waiting. (Also, as your author can attest from brutal experience, the flight is a lot less boring.)

Despite the range challenges, electric planes have big advantages over ICE-powered models. That includes lower maintenance and operating costs, no need for fueling infrastructure (other than chargers) and easier boarding on local routes. "We are proving that low-cost, environmentally friendly, commercial electric air travel can be a reality in the very near future," said Ganzarski.