I’ve been a long time reader, but not poster. For the last two years I’ve been working on a 2kW to 4kW solar system for car – since drip charging is better than supercharging and I need an off-grid solution. Currently the mechanics are designed in such a way that I can expand from the current 1575 watts to 4000 watts. This is because I am using telescoping carbon fiber tubes as my mechanism of expansion and contraction, as opposed to sliders. I’ve also recorded a 20 minute video on Youtube explaining my design decisions, and how I modify my solar panels to make it work (i.e.: remove junction boxes and wire directly to my trunk…)
Overall it has been a fun project so far and I am designing version two. Version one is 11 inches high and is made out of wood. Version two will be fully made of carbon fiber and will be 6 inches high. I certainly need help. Right now I researching the DC-to-DC charging and hot wiring. Right now I get about 20 miles when under the sun for about five hours, and should be 25 miles if I can get DC-to-DC charging. Under version two (which is 4kw) I should be able to charge about 50 to 75 miles per day.
Let me know if you have any questions and I’ll be happy to answer. Most answers are in the video here.
Thank you all for your inspiration by sharing and discussing the EV landscape.
Solar panels contracted, and driving
You can see the telescopic arms (carbon fiber and aluminum)
Excellent work. Tesla could engineer in solar panels into the glass roof and hood and likely come close to your 25 miles a day.
Toyota has a much smaller built in solar panel in the Prius Prime that increases the EV range by 10%