Examine the circuit schematic that contains the series, parallel and series parallel combination of power sources. .
Write down the voltage value of each of the power sources that are placed in series, parallel or in a series parallel combination within the power source circuit schematic.
Write down the maximum current value for each of the power sources that are placed in a series, parallel or in a series parallel combination within the power source circuit schematic.
Add up the voltage values for each series connection of power sources in the circuit to obtain the equivalent series voltage of the power sources. For example, if three two-volt batteries are connected in series, the equivalent voltage of this power source would be six volts, since two plus two plus two is six. This means that the voltage from the positive terminal of the first power source in the series connection to the negative terminal of the last power source in series would be six volts.
Label on the power source schematic the equivalent voltage series voltages for each power source series arrangement.
Add up the current values for each parallel connection of power sources in the circuit. For example, if three power sources that are capable of supply 100 milliamperes each were connected in parallel, the equivalent current of this power source would be 300 miliamperes, since 100 plus 100 plus 100 is 300. . This means that the maximum current available from the positive terminal of any of the power sources will be 300 milliamperes.
Label on the power source schematic the equivalent source currents for each parallel power source circuit arrangement.
Redraw your circuit schematic such that the series and parallel arrangement of power sources are each separately represented by their equivalent power source in terms of voltage and power. Within this newly drawn schematic, look for any series and parallel power source arrangements and then simplify the diagram such that any of these series and parallel power arrangements are represented by a single power source equivalent.