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I would first start with checking the load balancing in the power transformers before going into to much fancy technology as there is additional costs for cellphone rental and the likes to transfer data.
Load measurement can easily be done with a set of CT's and thermal Ampere demand meters...
Correct charging Voltage for lead acid batteries is between 13.7 to 14.1 Volts.
Battery at rest is 12.6 Volts.
I have used lead acid batteries under those for 8 - 10 years in diesel vehicles with no issues at all.
And fit the largest battery which fits and good clean connections is a must.
Just reading your post, had one of these potted units fail on a streetlight. Vented near the blue device, I think it was a Capacitor. Where the yellow arrow is, something near the blue device vented.
This is an epoxied, encapsulated unit.
White Led indicator running at 1 mA of 240 Volts mains, series R is 270 k.Ohm 1 Watt.
Classic Red led (2005) running at 1 mA @ 240Volts with also a 270 k Ohm series R.
There exist toggle relays which basically have two coils to change over from one state to the other. I have seen them in electricity prepayment meters. These coils were low voltage coils. Have a loo on eBay.
Older type doorbell transformers often had a 3 - 5 - 8 Volts, centre tapped winding rated at 1 Amps. and often, high impedance and short circuit proof. To get a reliable 5 Volts dc supply you need at least a 6.3 Volts (marginal) but better use an 8 Volts TX.
As already said by other posters, get a 25 Amp contactor which can be controlled via the timeclock.
You could get a three phase 16 Amp contactor ( they are relatively cheap ) and put the three contacts in parallel which effectively gives you a 45 Amp contactor. You are switching a resistive...
Simplest and most reliable way is to get three identical ex utility meters. Have one meter measure each individual Phase and the Neutral to the Neutral.
You can check for imbalances as the meters should more or less read all the same usage.
Power boards used often three single phase meters too...
I bought my first LED's in 1974. You could buy a packet of 16 LED's green, orange, yellow and red for 8 Guilders in The Netherlands. They needed 20mA and are very dim compared to today's standards. But they are still going 43 years later. I fitted some in a power supply which is on 24/7 and...
Check C3,those gold coloured Electrolytic are prone to failure. and may have caused downstream damage on the board.
That Z623 diode is massive, what is that feeding ?
Use a MOT and double capacitor stack. I have been using that for three years now zapping wasps.
Simple un-shunted MOT, 100 Watt ballast in series with the 240 V winding. HV Output to a voltage doubler which gives around 5600 Volts DC.
Make an appropriate grid contraption. safe for cats and other...
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