Create a graphic to represent a concept

I need to create a graphic to represent the concept "Drain to Gain". The premise is you need to empty a electric car of electricity (drain the battery) if you are to gain the financial benefits of buying/owning an electric car.
The background circumstance are that we design electric charge points and we have a new charge point that can take power out of a car as well as putting it back in. This is commonly referred to as V2G.

If you feel you can represent this concept and can help us create this graphic we then need ongoing support for subsequent graphics and imagery generation for flyers and materials surrounding the product.

We want some continuity with our current brand in the graphic
https://parknrecharge.net/