TAN001 - Smart Solar Power System RS485 Cable Failure

Communication issue affecting MODULAIR-X devices powered by some Smart Solar Power Systems.

This issue does not impact the safety of the battery in any way, and there is no immediate action that is required. This issue does not affect the performance of the Smart Solar Power System, only our ability to log performance data.

Issue summary

The third-party vendor that supplied batteries used in the Smart Solar Power System informed QuantAQ of an issue that affects a specific batch of the batteries. The RS communication pins within the battery itself are swapped, which means the sensor is unable to communicate with the battery management system to gather and report helpful debugging data.

Products affected

To determine whether you are affected, please reference the table below:

Sensor Model	Smart Solar Power System	Affected
MODULAIR or MODULAIR-PM	All	No
MODULAIR-X or MODULAIR-X-PM	SSPS <= 600	No
MODULAIR-X or MODULAIR-X-PM	SSPS > 600	Yes

Identifying impacted devices

If your device is affected by this issue, no solar data will appear despite plugging in the M8 data cable and enabling solar power in the device settings.

Issue mitigation

If no solar data is desired, then no action is required. However, we highly recommend making use of the solar data transmission capabilities of the Smart Solar Power System to assist in troubleshooting down the road. Our help article outlines the three options for mitigating the issue; the fastest option is to simply swap the two pins on the internal RS cable.