Just for a backup / survival / preparedness, I've got myself a portable folding 60w panel from FlexSolar. https://flexsolarenergy.com/products/60w-foldable-solar-panel . It says it has a DC output (20-28v) for charging a 12v battery. I guess I'd like some advice on charging a 12v battery (car), and whats the most efficient way while keeping the price down. Although I can get a pvm charge controller cheap enough, I'd like to get a mppt to charge the battery quickly. I live in Ireland so sunlight is practically non existent, so is it worth getting the mppt or is the pvm ok. I know 60w panel is not great but I'm limited on storage space and budget and thought the 12v car battery with 300w inverter would be an easy backup in a SHTF scenario. All critiques welcome!
