Latest software update

Part of the ladder logic program in the PLC

This afternoon I’ve spent a little time working on the charger. The charger stopped working on Monday after the power was interrupted for an hour or so while other electrical work was completed. A quick check at the time concluded that the radio link between the immerSUN and the charger had stopped working, and that the problem wasn’t a fuse, but other time commitments prevented further investigation until now.

The radio link carries the control signal from the immerSUN in the airing cupboard to the car charger in the detached garage.  The control signal is generated either when the immerSUN has detected that a suitable surplus of PV electricity is available to want the car charger enabled or its output current increased; or when a timed boost is programmed in the immerSUN typically to do overnight charging on cheap rate Economy 7 power; or indeed when a manual boost is demand via the immerSUN front panel, app or web portal.

Fortunately lack of the control signal doesn’t prevent car charging as I can disable the integral PLC (which leaves the charger on continuously) and allow the car’s internal timer to control when the car charges.

This afternoon I’ve successfully re-paired the receiver to the transmitter to restore normal charger operation and uploaded my latest software to the PLC.

The capabilities of the charger are now as follows:

Operating currents: 6, 10 and 16 Amps
Maximum continuous current (continuous grid load current):10 Amps
Peak current (from PV + battery only):16 Amps
Range switch interval:6 minutes
Minimum on time:10 minutes
Control signal watchdog (not during Economy 7 hours):15 minutes
Control source:ImmerSUN
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