Yes – electricity is used to position the heliostats, and electricity is used to drive the two motors in each molding armature. For small to midsized molds, these motors are 1/2 horsepower and require a total of @ 745 watts peak power. Our Solar Rotational Molding systems include photovoltaic panels, batteries, and charge controllers – you can install an SRM system anywhere. No grid-tie electricity is needed.