It's been a year and I've just heard from our friend Vincent regarding his Alerion/Mastervolt electric yacht. As discussed last summer one of the big questions that remained unanswered regarding the boat was the actual range with just battery power and limited regeneration capability. Well, as some of us expected, and the designer wisely anticipated, the second set of Mastervolt LION batteries has been installed. Vincent reports: " After a methodical 11 hour day yesterday, and some sore muscles, the second pair of MLI24/160's are in place, wired up and functioning. Considering the age difference of the original batteries and the new ones, I decided to move one of the old ones over and put it in parallel with its twin, and similarly parallel the two new batteries together. I left them all charging up last night, and will check on them later today (Saturday). I will then take the boat out and test its range a bit over the next few days.