the better pump to use would be a 12v fuel pump as they are high quality and used to running for long periods at warm/hot tempretues. useing a 12v-12V converter will level out the power flow and help the pump run longer as the panel can put out upto 19V in full sun which is too much over time. The panel its self would be more efficant outside the casing so it dosen't get so hot. Nice build though
basically well done. but there is a design flaw here. the photovotaic panel must be outside the colector. as here, the output is reduced because it gets far too hot.
