5
Installation
• Locate the charger in a suitable dry area in the vehicle or caravan.
• Secure the charger using the mounting tabs on the unit.
• Connect the input terminal on the rear of the charger using suitable cable
to the main starting battery of the vehicle (see specification table on
next page), it is recommended to place a circuit breaker (30A minimum,
not supplied) in the main positive lead as close as possible to the starting
battery.
• Connect the auxiliary battery to the output terminal of the charger, ensure
the correct size cable is used to prevent any voltage drop (see specification
table on next page).
• It is recommended to place a circuit breaker (30A minimum, not supplied) in
the auxiliary positive lead as close as possible to the auxiliary battery.
• Secure the negative wire to the common negative terminal and secure to a
metal (unmoving) part of the vehicle, it is preferable to connect this directly
to the negative terminal of both batteries.
• The TDR02020 will work with even the newest computer controlled
alternators, for installation into vehicles with variable voltage alternators,
negative must be connected to vehicle chassis.
• If connecting a solar panel connect the positive from the panel to the
solar input terminal and the negative of the panel to the negative terminal.
• There is no need for an external regulator the DC-DC has a built in
MPPT solar regulator.
• Check all connections are tight.
Once correctly installed the TDR02020 is a simple set and forget dual battery
solution.
Start the vehicle and let it idle, the charger will recognise that there is charge being
applied to the main starting battery. Once the main starting battery has reached
13.1V the charger will automatically begin to charge.
The charger will continue to operate even after the vehicle has been switched off,
however once the main start battery falls below a loaded voltage of 12.2V the
charger will automatically shut down.
The TDR02020 will prioritise the vehicle input over the solar input so while the
battery voltage is above 12.2V it will continue to charge, however once the main
battery has reached a loaded voltage of 12.2V and the charger switches off it will
look for a solar input.
If the solar input is above 13V then the green LED on the display will illuminate to
indicate that the TDR02020 is now using the solar input to charge the auxiliary
battery.
Once the solar input goes under 12V the charger will turn off completely.
INSTALLATION
