We In the USA have the same problem with our EV-1's. They seemed like a good idea at the time, but the big issue is the weight of the vehicle and contents is just too much of a load for the batteries and over time, a cell or two will go out making the rest of the battery pack work harder.
The biggest complaint is in the USA we have absolutely no customer support as the seller here in the United Staes is in McKinney Texas and they do not return calls or emails.
I just left my EV-1 on the side of the road where i was snow plowing with it.
I left my house with a complete full charge made it 1 half mile down the road and could not even make it back to my house.
It is very frustrating for the dealers also, as they cannot give their customers support if they cannot get HISUN in McKinney Texas to call them back or sell them parts.
You cannot buy a HISUN EV-1 replacement battery in the USA right now and the best you can do is a similar battery costing about 400 dollars with less cold cranking amps.
Polaris is coming out with an Electric ATV this year that I will take a look at but to be honest, for power and distance a gas rig is a better option.
