Need help with solar panels

jessiwall, it is possible that the three that are disconnected may be bad. Look for specifications on the panels, there should be some type of metal/metallic tag attached somewhere, that will tell you the panel's rating. To test them, disconnect all the panels and test the two panels that seem to be good, check the voltage output by attaching an electrical meter, set to read DC voltage, to the positive and negative leads. It should read somewhere between 12 and 18 V DC in good sun. If your meter is able to read current, amps, then switch the meter to that mode and again attach the leads +/-. If they are 64 Watt panels then the short circuit current (Isc) should be between 64/12 = 5 amps or so. Do this for each panel. If a panel is damaged the readings will be a lot lower. Sometimes it is just one cell in the panel that can break the chain and degrade the entire panel, then if it is attached with others it will degrade the whole system, which may be why some are detached. You can open the panel and check each individual cell to determine which one/s are bad and skip over them if you are handy with soldering.....Otherwise, keeping the other panels will definately not hurt. You can use them to have several batteries charged at all times and with a small inverter you can run dedicated circuits to lights and outlets to operate items year round and in emergencies, even some heating systems.....