Xantrex 815-3012-02, Руководство пользователя

Страница: 65 / 76

4 BATTERY INFORMATION
Battery Capacity
Battery size or capacity is just as important as the battery type
selected for use with the Freedom SW-RVC. The batteries are
the most important part of your system, so it is recommended
that you purchase as much battery capacity as possible. A large
battery will extend running time and ensure that your
inverter/charger delivers full rated surge.
It is recommended a minimum battery size of 200 amp-hours (Ah)
for moderate loads (<1000W) and greater than 400 Ah for heavy
loads.
See “Estimating Battery Requirements” for information on a more
detailed calculation.
About Amp-hours
A number of different standards are used to rate battery energy
storage capacity. Automotive and marine starting batteries are
normally rated in cranking amps. This is not a relevant rating for
continuous loads like an inverter. Deep-cycle batteries use a
more suitable rating system such as amp-hours (Ah).
Amp-hour capacity is the number of amps a battery can
continuously deliver during a specified number of hours. It is
represented by the product of the two —amps multiplied by hours.
A typical RV battery rated for 100 Ah can deliver 5 amps for 20
hours (5 amps × 20 hours = 100 Ah). This same battery can
deliver a higher or lower current for less or more time, limited
approximately by the 100 Ah figure (50 amps for 2 hours or 200
amps for 1/2 hour), but usually the capacity figure given is only
accurate for the specified duration (20 hours).
975-1057-01-01 66