Here is another system you might want to consider. We have 110v service at our field, so several of us have taken PC power supplies and converted them to work with the MKII. (Note that you need to add some resistors in the power supply to avoid frying the board in it.) Basically, I plug in the power supply, add the field charger and charge away. It works great. I think there is a thread or website that has the instructions, but I can't remember where. For me, I had a fellow club member wire it up with the resistors because I am limited in my electrical skills.