Although we initially had the eZee controllers modified and advertised as being 48V capable, there have been enough failures at this point that we are going to back down and only suggest them for 36V operation. Under heavy load conditions at 48V, such as going up a long steep hill full throttle, there is a possibility of a mosfet frying. This didn't happen in our original 48V testing as we were using 8AH NiCad packs which would sag to about 43V at 20A currents. But the trend recently has been for "48V" 16 cell LiFePO4 batteries (more properly called 52V packs), and these deliver a higher voltage to the controller under load which can more easily put it over the edge.

For customers currently running their eZee kits at 48V, we recommend using a Cycle Analyst to limit the current draw to 15 amps max. When we receive the new controllers alluded to in the previous paragraph and have validated their robustness at 48V, then we give the option of exchanging these for the eZee controllers so that you have the 48V capability originally implied.