when joining 3 batterys together in a circuit do you need the batterys positive to positive or posivive to neg?

It could be either way depending on what you are after.

For example, if you have three 12 volt 50 amp-hour car batteries and you want the batteries to run headlights three times as long as a single battery would you can connect them in parallel... all the negatives are connected together and all the positives are connected together. That produces 12 volts with a 150 amp-hour capacity. On the other hand, if you want more voltage, like to run a golf cart, you connect them in series. The negative of the first one is your negative connection and the positive of the first one connects only to the negative of the second one, and so on until you have only the positive of the third one which will be your positive connection. That gives you 36 volts at 50 amp-hours.

The same applies to the solar panels - if you need more voltage you connect them in series, but if you are after more current at the same voltage you connect them in parallel. In any event, do not connect them positive to negative and negative to positive in a loop - you will get lots of current but no voltage.

If you need more VOLTAGE, connect then in series: Positive of panel A to the negative of panel B. The positive of panel B to the negative of panel C. The load will be across the positive of panel C to the negative of panel A. The voltages will be added together and the total voltage will be the sum of the individual solar panels or batteries.

If you need more current capacity, connect them in parallel. All the positives connected to each other. All the negatives connected to each other. The total current capacity will be the sum of the individual current capacities of the panels or batteries.

It's the same for batteries. But all of the batteries should be of the same voltage and current capacity.

So, if you have three 12 v solar panels of 1/2 amp each, connecting them in series will give you 36 v at 1/2 amp total. Total wattage is 18 watts.

If connected in parallel, you'll have a 12 v system with a 1.5 amps capacity. Total wattage is 18 watts, also.

Charging via USB depends upon the voltage and current requirements. USB ports are 5 volts. You don't want to go higher - you'll burn out your device.

That depends. What voltage do you need?

If you connect the batteries in parallel, (all of the positives together, and all of the negatives together,) then you get the voltage of just one battery, (say 1.5 volts,) with a greatly increased life cycle.

If you connect the batteries in series, (positive to negative to positive to negative, etc.,) you will wind up with three times the voltage, (say 4.5 volts,) but only the endurance of one battery.

Either way. Connecting them positive to negative is called in parallel and you get three times as much voltage as one battery. Connecting them positive to positive is called in series and you get three times as much current.

you ought to have crossed the terminals with the spanner, subsequently the zap. it is large to the touch the two one, yet dont enable then connect. automobiles damaging return is by ability of using a automobiles physique, so in case you linked the beneficial to the automobiles physique by ability of using a spanner on an analogous time as fiddling, in spite of if ZAP!! in basic terms be careful, use a quick spanner for the bolts on the battery connections.

poitive to positive, negative to negative. you want the voltage to stay the same but a larger capacity of current.

Whether connected as either series or parallel,for your purpose either will work.But....you will also need to use a small voltage regulator.Otherwise there will be problems. Try using this simple device commonly available:http://www.radioshack.com/product/index.jsp?produc...

positive to positive