Power Plus Lithium Battery
Upgrade
Airstream now has a new lithium battery upgrade kit
available. Depending on the model year, and options,
other items may need to be changed, like the
converter and/or solar charger.

Battle Born battery model # BBGC2H, Airstream part number 513862, has a Bulk/Absorption rating of 14.2 to 14.6
volts. The Float rating is 13.4 to 13.8 volts. Each battery has a 100 amp hour rating. The battery has a max voltage
of 14.7 and will stop charging if this is exceeded and a low voltage shut off of 10 volts, at which point it will stop
discharging. The battery has a high temperature rating of 135 degrees and will not charge or discharge above this
rating. The battery has a low voltage of 25 degrees and will not charge below this temperature, but does have an
internal heater if using in cold conditions. Details on wiring the heater and its parameters are included in these
Instructions.

You will need a Notice sticker, Airstream part number 386433, to be installed on the top of each battery. This is
very important, once you change the converter for lithium you can no longer use AGM or lead acid batteries with
the trailer, unless you reinstall the original converter and change the solar controller.

Solar Controllers:
All 2021 models and Classic's 2019 and newer:
For the 2021 model year, we changed our solar charging system to the Vectron charger and display. If the unit has
a factory installed solar charging system, you will need to change the settings on the solar controller from 3 (AGM)
to 7 (Lithium). This solar charger is a three stage charger and is optimized for the new lithium batteries.

All 2017-2020 units and Classic's 2017-2018:
The Sun Explorer II Solar Controller 40 AMP was an optional package from 2017 through 2020. This
solar controller will need to be changed to one that has an option to pick the battery type, but the
display can be used. In January of 2018 we changed from 10 gauge to 8 gauge wire for the solar.
Sun Explorer II 40 amp kit Airstream
part number 513247
Display: Airstream part
number 513247-100

Controller: Airstream part
number 513247-105

40 amp controller with switchable
battery choices, Airstream part number
511846-102

All 2016 and older units:
If a 2016 or older unit had factory solar installed, it will have the 25 amp solar controller and display.
Both the display and controller will need to be changed for lithium batteries to be installed.
25 amp controller and display

40 amp controller with switchable battery choices
Display: Airstream part number
513247-100

Controller: Airstream part number
511846-102

Converters:
The new 2021 Basecamp 20 has a new Progressive Dynamics power center with a switchable converter. This power
center has a Lithium option and will only need the lithium batteries installed. The switch will need to be moved to
the LI position for lithium. Airstream part number 513802

All other 2021 and older trailers will need the converter changed when adding the new lithium batteries.
For 30 amp units, you will need to replace the converter with a new WFCO WF-8950L2-MBA.
Airstream part number 513889. This converter will have the charging parameters for lithium

For 50 amp units, you will need to replace the converter with a new WFCO WF-9850L2.
Airstream part number 513890. This converter will have the charging parameters for lithium

Battery Box:
The Battle Born lithium batteries will fit in the current battery box. The battery dimensions are L
10.32" x W 7.19" x H 11", and each battery weighs 31 Lbs. All 2016 and older units will need to have
the battery box replaced with this new larger battery box, or a 3" collar added to the box under the
lid. The older box fits two group 24 batteries, whereas the current battery box can fit two 6-volt
batteries, which is the size of the Battle Born batteries. The Airstream part number for the battery
box is 916044.
Before 2016 the box was 8-1/4" deep

2016 and newer units will have a 12"
deep box

Battery Heater:
Each Battle Born battery has an internal heater that should be wired if the guest plans on using their
trailer in temperatures below 35 degrees. The wiring kit included with the battery will connect the
positive terminal and the heater screw connector. When storing the unit in temperatures below 35
degrees it is best to disconnect the heater or install a switch to turn the heater off, as the heating
element will have a draw of 250 milliamps.

Storage and Maintenance:
Storage:
When storing the batteries, charge the batteries to at least a 50% state of charge. It is
best to charge them to 100% and disconnect them from anything that would discharge
the battery, including the battery heater.
Maintenance:
The only maintenance needed is to make sure the terminals are clean and that the
cables are tight.