User`s manual

12V Battery Bank
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9
Elite
™
2000W—Pure Sine Inverter by Wagan Tech
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10
User’s Manual—Read before using this equipment
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, there is no relationship between
cold cranking amps (CCA) and ampere-hours (AH).
For example, if a 20 AH battery is discharged at a 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 13.4 volts (fully charged) then drops to 10.5 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). In heavy battery discharge applications, double the estimated Amp
Hour rating and configure batteries to support this capacity. If the batteries
are frequently charged by an alternator, the Amp Hour rating of the battery
may be reduced.
Configuring the battery bank
Batteries that are used indoors or inside a vehicle or vessel, should be deep-
cycle, sealed lead acid batteries.
NOTE: It is important that for any inverter installation to battery protection
fuses. Battery fuses are added to the positive (+) battery cable as close as
possible to the battery bank’s positive terminal. The fuse amperage rating
must be sized to allow simultaneous operation of all the AC appliances
to be powered, plus 20 percent safety factor. Fuses are very important to
protect equipment, batteries and personnel. The fuses protect against battery
explosion if the cables that connect to the inverter accidentally short.
Battery Bank Diagram
The diagram below shows inverter connections to a battery bank with
recommended fuse protection.
Fuse
WARNING—Exploding Batteries!!
exploding baTTeries can spray molTen lead, hoT sulfuric acid, and
oTher meTal and plasTic fragmenTs. baTTeries ThaT are charging or
under high discharge raTes produce explosive hydrogen gas inTo The
surrounding area. be safe–fuse The baTTery bank and make sure The
baTTeries are properly venTilaTed.
DC Cable Gauge
Minimize cable losses by using the thickest wire available and the shortest
practical length.
Measure Round Trip (RT) cable distances in feet. Round Trip cable distance is
battery to inverter and back to battery. If the application is in a vehicle with
engine operating, use the supplied cables for round trip distances up to 5 feet.
Use a recommended ANL fuse and Fuse holder. Fuse at 300 Amps. ANL are
quick acting and sealed so they do not spark when they blow. Place fuse no
more than one foot from the Positive (+) terminal of the battery.
RT Length 4-6 Ft 7-8 Ft 9-10 Ft 11-14 Ft
AWG 2 0 0 0