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Beware of so-called maintenance-free wet
cell batteries. These batteries have calcium
alloyed with the lead liquid. They are sealed
and water cannot be added. Do not confuse
them with true gel cell or AGM batteries—they
will not hold up well to deep discharging and
repeated cycling.
Gel Cell Batteries
Gel cell batteries are lead-acid batteries
similar in many ways to the common wet cell
battery, but differences in the chemistry and
construction provide some unique features.
• No Maintenance
• Low Self-Discharge Rate
• Low Internal Resistance
Even though gel cells are sealed
batteries, the battery compartment should still
be ventilated.
Advanced AGM (Absorbed Glass Mat)
Batteries
This battery is lead acid but maintenance free.
They hold the liquid electrolyte in a sponge-like
material. The performance is similar to gel cell
batteries. The charge parameters are similar
to wet cell batteries.
Battery Selection
The most important feature to consider in
making your battery selection is to select true
deep cycle batteries rated in amp hours (Ah)
and sized to match your power requirements.
BATTERY INTERCONNECTION
In most cases, you will be using a bank of two
or more batteries with your inverter/charger.
You may connect batteries together in two
configurations—series and parallel—
depending on their voltage.
BATTERIES
Series Configuration
Connecting two batteries in series will
double the voltage of the battery bank. For
instance, two 6 volt batteries connected in
series will produce 12 volts. The amp-hour
capacity of the battery bank will be the same
as each individual battery. Example, two 6 volt
220 amp-hour batteries in series will produce
one 12 volt 220 amp-hour battery bank.
Series
+
+
Series Increase Voltage
EACH BATTERY
CAPACITY:
220
AMP HOURS
@ 6 VDC
TOTAL BATTERY
BANK CAPACITY:
220
AMP HOURS
@ 12 VDC
6V
6V
+
+
_
_
+
_
12V INVERTER