Hi there, im building a solar car for the solar car challenge in my area, and im just wondering wat is the best way to hook the battery pack up to the solar panel and motor, also the best type of battery's, as i want the lightest possible, (its only an RC Solar Car) its 30W panel, and the battery's must not exceed 2VaH and must be solely used as a voltage regulator nothing elseneed more info just say so,thanks,schultzy
You don't say what the panel's output voltage is or the motor input voltage is. Basically, what they want is to hook the panel to the motor and battery in parallel so that when the panel gets more power than the motor needs, it's used to charge the battery. For instance, if the panel puts out 12 VDC and the RC motor is a 9.6V, you need a small 9.6V battery to limit the panel output to 9.6V.
Depends which 7805 you are using and the current drawn from the regulator. The TO3 cased 3A shouldn't bat an eyelid, the TO220 case 1A one should manage with a moderate sized heatsink and the TO92 one would be hopelessly under rated even with a heatsink the size of the USS Nimitz aircraft carrier.
