The AGM batteries that power my electric drive are 6 years old. I have noticed a reduction in range when motoring longer distances. To extend the range I can use a portable generator to charge the batteries, I've only done that once but it has been a part of the electric propulsion plan from the start. The one time we used the generator it sat in the cockpit next to me, not the best place even if it is a relatively quite Honda 2000i. I bought a set of Mastercraft 235 removable swim platform brackets and built a platform. Now the generator can sit behind the cockpit when needed and we get an extra 3' of "deck" space .