Fixing the Engage Monitoring System

Back in 2017 I installed an electrical consumption and solar input monitoring system for the house.  The system measured the electrical consumption of the house and the amount of solar power produced from our rooftop panels.  The system takes and records data every 5 seconds.

At the switchboard there are two battery powered Transmitters (three AA non rechargeable batteries in each).  The Transmitters wirelessly connect to a 'Hub' in the house which is connected by ethernet to the router.  The router then stores the collected data on 'The Cloud'

The problem I have identified is the non rechargeable batteries go flat and the battery terminals are corroding.

Transmitter corroded battery compartments

The plan is to disassemble the Transmitters fitting a positive and negative wire to the battery terminals in order to power them with an external supply

Rummaging through my box of old power bricks I've found one with the appropriate 240V AC input and correct DC output.

The converted Transmitters now look like this

 

There is a dual 240V socket beside the switchboard.  One socket is used by the irrigation controller and the other is spare.  Well not any longer as it will be the power supply for the Transmitters.

Now I need to check the 240V to 9V power brick for the torch conversion.  Mick (nb Oleanna) picked up on something I hadn't noticed.  The power brick is marked 9V AC rather than 9V DC.  I'm claiming the issue occurred because I'm older than Mick and therefore have worse eyesight.