Votage seems good there even using the diagnostics on the forklift. Temps on the inverter seem good and on the motors. After a charge the vehicle was up to 5 mph but justs to 4mph and now the battery drains. 6am full charge to 9am it at a little over half. I had a worker tell me the forklift is capable of the avg of 8 to 9 mph.does that have to do with the inveters npt putting out engouh. Just not sure where to start with no manuals... thank you for the help so far