Battery (Lead Acid); Battery (Lead Acid); Breakaway Switch; Battery Amp Draw And Testing - Airstream International Serenity 23CB 2020 Owner's Manual

Maintenance

Breakaway Switch

1� Pin
2� Breakaway Switch
To prevent corrosion within the breakaway switch, pull
the pin out and spray the inside of the switch through
the hole with an electric contact cleaner (such as Spra-
Kleen). Applying a drop of light household oil on the pin
and the groove near the base of the pin will allow the
pin to operate freely. Immediately reinsert pin. Perform
this procedure every 90 days.
CAUTION
Allow no more than 20 to 30 seconds pin
separation, as damage to brake magnets may

Battery (Lead Acid)

Your Airstream trailer is factory equipped with an
Interstate battery (SRM-24). When solar panel
equipped an AGM GPL-24 battery will be installed.

Battery Amp Draw and Testing

For example, a battery with a 100 amp-hour capacity
can deliver 1 amp for 100 hours or it can deliver 100
amps for one hour. Batteries are able to deliver current
longer if they are discharged at a lower rate and deliver
less current at a higher discharge rate.
All batteries will have an Amp Hour (AH) rating. The
AH rating on a battery is its C/20 rate or 20 hour
discharge rate. As long as a battery is discharged over
a 20 hour, or longer period, it will deliver 100% of its
rated capacity. If it is discharged in less time at higher
currents it will deliver less capacity.
8-10
occur.
For proper load testing the battery needs to be fully
charge and the voltage should be greater than 12.8
volts. A typical load test should be 3 times the amp
hour for 15 seconds. At the end of 15 seconds the
voltage of the battery should stay above 9.6 volts. If the
battery cannot reach a fully charged voltage of 12.8 or
greater the batteries will need to be equalized.
NOTE
When checking the state of charge the battery
needs to have been disconnected from a charging
source and any loads for a minimum of four hours.
Before removing the batteries verify that shoreline
power is not connected. Risk of electrical shock
may be present.
The following chart shows the approximate % of
charge SOC (State of charge) vs. OCV (Open circuit
voltage) and specific gravity for Interstate batteries.

Battery Cleaning

Battery maintenance is an important issue. Maintain a
clean battery top and check terminals and cables for
tightness and cleanliness. A dirty battery will dissipate
its charge through surface contamination. Clean the
battery top with a damp cloth and dry thoroughly.
To ensure maximum battery capacity on the charge
and discharge, the battery terminals and the inside
portion of the cable connector should be scraped
or brushed. The terminals should be tight and free
of corrosion. The battery should be cleaned using
a baking soda and water mix, with a ratio of two
tablespoons of baking soda to a pint of water. The
cable connection should be cleaned and tightened
regularly.
WARNING
2020 International