Follow the advice for lead/acid traction batteries Rebecca (Battery Electric Forklifts), well ventilated space (Hydrogen gas is released during charging process and could build up to an explosive concentration-about 4%), unwise to leave on charge overnight (cause of a number of workshop fires). Check DC leads on charger for nicks/breaks in their insulation (no great risk of shock, but a short circuit could start a fire or cause battery to explode),A dry chemical, CO2 or foam fire extinguisher must be at hand too (staff should be trained to use any portable fire fighting equipment provided in their workplace)

There's some quite good advice here and a guide to motor garage hazards here it's an old Dept Of Health handbook, but still some useful observations.

Technology is catching up, so charging specifics will vary according to the type of battery fitted. And Electric Trucks/Buses have their own specific requirements- see this thread

awesome, cheers steve