Formula E has made changes to its proposed 'Fan Boost' system, which will allow a public vote to determine which drivers are given extra power to deploy during a race.
At the championship's launch event in London on Monday it was revealed that the power boost available has been increased to 90hp.
The online fan vote, which will close shortly before the start of a race, will allow the three most popular drivers to receive one boost each, which will increase the power of the car from 133kw (180bhp) to 200kw (270bhp).
On the subject of Formula E's official launch, the series' CEO Alejandro Agag said: "As our first race draws closer, it's fantastic to see the new era of motorsport come to life.
"Next month will see our first [public] test days where we already have 3000 members of the public registered to come and see, but also hear what we believe will be the future of motorsport.
"We are very excited about the start of the season and pleased to be taking further steps forward."