Em 21/04/2014 12:15, Denny Esterline escreveu: > First, if he's consistently fully charging his batteries before the end o= f > his effective power period (and his data suggests he is) there's poor > design here. Simple first year engineering question, balance your > production with your ability to use and/or store. Either add more storage > or don't invest so much in collection panels. I think it is necessary to make provision for less than optimal conditions, such as long periods of rainy and cloudy weather, winter, etc. So, having collecting capacity exceeding storage capacity is not unwise. Also, it is prudent to have a larger storage capacity than the everyday needs, to support an unexpected increase in consumption. Ideally, he should be able to sell the excess production, then it all would revert as extra income. Isaac --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .