Onto the solar fitment! I was tossing up many different mounting options and roof rack systems and all sorts for ages, as with everything on this car a balance between off road usability and on road manners/mpg was tricky.
Eventually I decided to just keep it simple and glue them directly to the roof, this will provide the best aerodynamics but may reduce the power the solar panels produce in summer if they get too hot, il keep an eye on it but we are only just starting winter in Australia so that's a long way away.
I removed the AM/FM radio antenna and ran the solar wiring through the resulting hole in the roof, the antenna itself I just tucked under the roof lining so it still works but doesn't have quite the same signal range it did before. I usually connect my phone for music so that's not an issue.
I used an Anderson plug to connect the panel to the wire going into the car so that if I park in the shade I can unplug the rooftop panels and plug in an extension cord to some portable panels which I can sit away from the car in the sun.
Moving into the boot, The original plan was to make a board to replace the factory tray that fits above the spare tyre which my car was missing when I bought it, on that board il mount the solar controller as well as a 240v mains charger for the 12v system and a 600w inverter, I may also fit my 2000w inverter later down the track along with some extra batteries and an external 240v input/output plug/socket so I can use the Prius as a UPS for my house. Ive since changed my mind and I think I might mount them in front of the hybrid battery where the back seat used to be instead for better weight distribution
The next stage will be to upgrade the 12v battery, I'm not sure whether to go for a larger capacity AGM or if the factory DC-DC charger is capable of charging a lithium battery.