Using The J35 As A Power Supply (Batteryless Operation) - BMPRO J35 + ControlNode Owner's Manual

Heavily Discharged Lead Acid Batteries
The J35 will not charge heavily discharged lead acid batteries.
In normal use, and with the J35 battery health preservation, batteries should
never become heavily discharged.
If your battery is heavily discharged, disconnect it from the J35 and charge with
a stand-alone charger. Reconnect the battery once the battery voltage has
recovered to normal levels.
Heavily Discharged LiFePO4 Batteries (J35B-L / J35D)
The J35B-L and J35D can recover and charge a heavily discharged LiFePO4
battery. The internal Battery Management System (BMS) of a LiFePO4 battery
will turn off if it detects that the battery is heavily discharged. The J35B-L or
J35D will provide the voltage to restart the LiFePO4 battery's BMS and then
commence charging of the LiFePO4 battery.

USING THE J35 AS A POWER SUPPLY (BATTERYLESS OPERATION)

The J35 will act as a power supply if the following conditions are met:
1.
A battery is not connected to the J35, and
2.
The J35 is connected and powered from mains, or
3.
The J35 is connected and powered from AUX input.
Power Supply mode allows you to control and power your caravan's loads
directly from mains or AUX without the need to connect the caravan battery.
When powered from the mains, the J35 provides an output voltage of 12.8V.
When powered from an AUX input, the output voltage will vary depending on the
AUX input voltage.
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