Xantrex 3000 Manuel d'utilisateur télécharger pdf (Page 48)

Battery Types

B–2 975-0128-01-01

A battery isolator is a solid-state electronic circuit that allows equipment

to be operated from an auxiliary battery without danger of discharging the

vehicle’s starting battery. During vehicle operation, the battery isolator

automatically directs the charge from the alternator to the battery

requiring the charge. Figure 3-1, “Configuration for Normal Loads” on

page 3–2 and Figure 3-2, “Configuration for Heavy Loads” on page 3–2

show a battery isolator in configurations for normal and heavy-duty loads.

Battery isolators are available at marine and RV dealers and most auto

parts stores.

Battery Size

Battery size or capacity is as important as the battery type for efficient

operation of your loads. Xantrex recommends that you purchase as much

battery capacity as possible.

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, either

“amp-hours” (“Ah”) or “reserve capacity” in minutes.

Battery Reserve

Capacity

Battery reserve capacity is a measure of how long a battery can deliver a

certain amount of current—usually 25 amps. For example, a battery with

a reserve capacity of 180 minutes can deliver 25 amps for 180 minutes

before it is completely discharged.

Amp-hour (Ah)

Capacity

Amp-hour capacity is a measure of how many amps a battery can deliver

for a specified length of time—usually 20 hours. For example, a typical

marine or RV battery rated for 100 Ah can deliver 5 amps for 20 hours (5

A x 20 hours = 100 Ah).

CAUTION

The XPower 3000 must only be connected to batteries with a nominal output

voltage of 12 volts. The XPower 3000 will not operate from a 6 volt battery and

will be damaged if connected to a 24 volt battery.

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Xantrex 3000 Manuel d'utilisateur Page 48