Wagan 2005-1 Manual de usuario descargar pdf (Pagina 9)

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User’s Manual—Read before using this equipment

• Charge level of the batteries (between use, chargers have to be able to

fully charge the batteries)

• Temperature of the batteries (colder batteries provide fewer amps)

• Age and condition of the batteries (older batteries lose AH capacity)

• Compliance with turning off unnecessary AC loads

• Use of DC appliances and compliance with turning off unnecessary DC

loads

• If the inverter is installed in a vehicle and the alternator output in Amps

cannot supply enough current for the inverter, additional batteries are

required to supply the required current.

DERATING THE BATTERY BANK

Most lead-acid batteries have a rating expressed in amp-hours (AH). The

most common rating of AH is at the “20-hour rate”.

NOTE: Despite several Internet explanations, here is no relationship

between Cold Cranking Amps (CCA) and Ampere Hours (AH).

For example, if a 20Ah battery is discharged at an 1 amp rate, is will take 20

hours to discharge that battery. The terms “charged” and “discharged” relate to

actual battery voltage. This means that the output voltage of a nominal 12 volt

battery starts at 13.2 volts (fully charged) then drops to 10.6 volts (discharged).

If the load on the battery causes the battery to discharge faster than the 20 hour

rate, the capacity (AH) of the battery is measurably reduced (derated). Derating

is a major run time factor. Some benchmarks are as follows:

• If an 100 Ah Battery is discharged at 100 Amps, the battery capacity acts

like a 56 Ah battery.

• If an 100 Ah Battery is discharged at 200 Amps, the battery capacity acts

like a 32 Ah battery.

Again, both high discharge rates are faster than the 20-hour rate so battery

capacity seems lower.

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Wagan 2005-1 Manual de usuario Pagina 9