Why cant I just use deep-cycle 12-V batteries to save space and weight?
Assuming that your goal is to have the same voltage either way, you will have less capacity and range using the 12-V batteries. However, if the vehicle is small and light, 12-V batteries are the best option because of lack of space and the need for less weight. Many Geo Metro and VW Rabbit conversions use 12-V batteries. Realize that these are not 12-V automobile batteries. They are deep-cycle batteries intended for golf cart and other electric vehicle use. 8-V golf cart batteries are also available as a design option.
