That could be a useful vehicle to have for manned lunar exploration, and it's interesting to see that Toyota is part of the Japanese partnership designing this, as Toyota has several years experience in developing the Mirai hydrogen fuel cell powered vehicle. The Apollo lunar rovers of course just used one time use non-rechargeable (silver-oxide) batteries. However for a lunar vehicle that is meant to be re-used it makes a lot of sense to use hydrogen and oxygen fuel cells since the hydrogen and oxygen required can be produced on the lunar surface from the water ice that is known to exist in the Moon's polar regions.