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## System Capacity and Calculating Storage of DC current.

 The storage capacity of your system and the generator output is a critical factor to how long your batteries will last. A balance has to be maintained for optimum performance and longevity of any DC storage system.     Charging the battery or batteries has to be calculated to make up for the usage in time or the system will become problematic and fail. A simple example is a car or truck battery that goes dead because the driver starts it up and drives just 5 minutes to work and shuts it off and then drives 5 minutes home and parks the vehicle. If that person repeats that daily his or her battery will fail. Not because the alternator or generator failed but because it took more DC current to start the vehicle than the charging system could make up in the time it took before shutting the engine off. So there has to be an equal exchange or the system will fail.     Here we will begin with a simple 6 cell 12 Vdc battery that has the optimum charge @ 13.2 Vdc, our charged battery has the surface charge removed and drained and is maintaining 12.8 Vdc for 10 hours with no load applied (current drawn).   NOTE: As a battery is charging it maintains a high static charge from the compression of electrons inside and the higher voltage charging rate. A regular 12 Vdc light bulb (1156) should be connected to the battery and turned on and ran for a minimum of 15 seconds and shut off. The battery voltage becomes nominal after a period of 1 minute of small current draw, but you don't need to test your system like that unless it is failing to produce current for the expected period in time. Electrical current (Watts) is calculated by the hour i.e. a light using 100W for 1 hour uses 100 X 1 = 100 Watts. Calculating current draw is not the same as calculating consumed watts when calculating usage, wattage is a total based on the hour (consumed) and the current is based by the second (current Amps). The Amps (per hour) is the factor that determines the size of your charging system. The total consumed watts is simply how long in hours did the generator have to run at the calculated Amp Capacity. That is what costs more fuel, less energy production in kWh (kilo Watt hours) and maintenance in the power generating fields ending up as inefficiency in the system.