Power steering uses power, and in an EV power is a pretty valuable thing so there will be some deciding to be done over whether PS is worth the sacrifice in range. There are several options for what to do with power steering in an EV, it will depend on your preferences for PS and range. It should be noted however that in some countries it is illegal to swap the OEM power steering setup for non standard manual one if the vehicle did not have non power steering as an option when new or even disable it.

Here are some PS options:

• Convert to a Manual Steering Rack: If your vehicle was also available with manual steering then it is possible to convert your PS to manual steering by swapping the racks. This is probably the best option for range focussed individuals.
• Loop the hydraulic lines: Another option is to throw out as much of the PS equipment as possible, loop the input and output of the steering hydraulics together with a section of hose (do NOT cap those fittings off, you'll end up with locked steering) after filling the rack/gearbox with the proper fluid for your particular system. But due to the difference in ratios between the manual and power steering racks and the resistance of the hydraulic fluid this will require much more effort than a normal manual rack.
• Use an accessory motor: It is possible to use a secondary electric motor to drive the stock power steering pump. This will give you standard power steering but the obvious problem with that is the additional draw on the batteries, and attendant decrease in range.
• Electric power steering: Some cars have electric power steering pumps that can be harvested for use in EV's. However, these are high power devices (typically 12-60amp) and they will impact range. Some late model small European and Japanese cars use electric assisted power steering. These systems use an electric servo motor either in the rack or on the steering column somewhere meaning they are not hydraulic. This is much more efficient than the hydraulic system but obviously less than a completely manual rack.