BC300 + COMMLINK

A BC300 is required for any load or separate charge source going directly to the battery that is over the rated current of the BP35 or J35 System. Typical items fitted directly to batteries in caravans are : Inverters (of any size), diesel or gas heaters, air compressors, portable solar panel or additional solar panels needed to run via a separate solar regulator.

The BC300 does not have its own app. The BatteryCheck range and the BC300 are two different products for two different applications. The BatteryCheck was designed as a stand-alone app as a wireless battery monitor, while the BC300 was designed as an addition to use with the BP35 and J35 range of battery management systems to allow excessive loads from the battery to be monitored through your caravan’s digital display.

Both units can communicate to each other 25 meters away from one another in open sight.

The BC300 and CommLink lights will always flash green when paired.

On the CommLink unit, there are two CAN bus ports. The BC300 kit comes with a small CAN bus lead. Simply unplug the CAN bus from the right hand side of the BP35. This lead can be plugged into the CommLink. The spare port on the CommLink can now have the small lead that was supplied in the kit plugged in. The other end of the small lead can be plugged back into the BP35.

On the CommLink unit, there are two CAN bus ports. The BC300 kit comes with a small CAN bus lead. Simply unplug the CAN bus from the bottom-left hand fromt side of the J35. This lead can be plugged into the CommLink. The spare port on the CommLink can now have the small lead that was supplied in the kit plugged in. The other end of the small lead can be plugged back into the J35.

Portable solar will not show up as a source on your display. Instead, it will show as a total of the amps going to the battery when charging, as the BC300 cannot determine where the charge source is coming from. The BC300 can only show charging and the total amperage going to the battery.

If your battery management system has an inbuilt solar regulator, unregulated solar panels should connect directly into the J35/BP35 solar input terminals. There is no need to install an external regulator between the solar panel and the J35/BP35. If you want to add an additional regulated solar panel or a blanket panel, it needs to go directly to the battery, and would require a BC300 fitted so that your battery monitor (JHub, Odyssey, Trek, RVView, JControl) reads correctly with the coulomb counting. If your J35/BP35 is not solar compatible (J35A and some earlier versions of the J35B, BatteryPlus35-PM), you can install your solar panel directly to the battery through an external regulator. If you want your battery monitor to see the solar charging current at the battery, you will need to also connect the negative through the BC300 shunt.