ICON i40L, Owner'S Manual

Page: 73 / 80

Owner’s Manual Scheduled Maintenance 73
The Specific Gravity of a
Fully Charged Flooded Battery
A hydrometer reading of 1.277 or greater indicates full
charge for most Trojan batteries. This value is based
upon a specified temperature of 80°F (27°C). The
specific gravity or voltage of flooded batteries should
be monitored every 4–6 weeks and should be given
a boost charge when they are at 70% stat of charge
(SOC). When batteries are taken out of long storage,
it is recommended to recharge before use.
Proper Electrolyte Level
Liquid levels should be 1/8 inch below the bottom of
the vent well (the plastic tube that extends into the
battery). The electrolyte level should not drop below
the top of the plates.
When Should Water be Added to Batteries
Water is lost during the charging of flooded batteries.
The best time to water your batteries is always at
the end of the charge cycle however, if the plates
are exposed to air, add just enough distilled water
to cover the plates before starting the charge cycle.
When the charging process is complete, re-check the
electrolyte and top off as needed.
How Often Should Water be Added to Batteries
It is best to check your new batteries regularly as this will
give you a good feel for how often your application will
require battery watering. WARNING: A brand new battery
may have a low electrolyte level. Charge the battery first
and then add water if needed. Adding water to a battery
before charging may result in overflow of the electrolyte.
When to Equalization Charge
Equalizing should be performed when a battery is
first purchased (called a freshening charge) and on a
regular basis as needed. How often this might occur with
your battery will vary depending on your application. You
will need to monitor your battery voltage and specific
gravity to determine when equalization is needed. For
example, it is time to equalize if the measured specific
gravity values are below manufacturer’s recommended
values after charging (recommended value for Trojan
Deep Cycle batteries is 1.285 +/- .007 at 80º F (27º
C)). Equalizing is also required if the specific gravity
value of any individual cell varies 30 points or more. In
addition, reduced performance can also be an indicator
that equalizing is necessary. Equalization should be
performed when individual battery voltages in a battery
pack range greater than 0.15 volts for 6-volt batteries or
0.30 volts for 12-volt batteries.
AGM batteries are maintenance free.