I have a tendancy to get carried away with these things.
The battery hospital is now Solar / Mains, 24V/12V & 12V with metering (that shunt was partially vapourised...if you have to ask...)
The PWM controller on the MPPT LVD terminals notion didn't work.
It was causing circuit breaker chatter. I had PWM Voltage but no current.
As I listened to it singing in torment wondering what to do next, I thought about asking MorningStar's advice and then I knew they'd just say no, don't do that. I thought some more and that maybe there was something to that...
I took a moment to reflect on my new no more blowing up expensive hardware resolution and recalled I had tried this before with a Mains charger and a PWM Controller...the mains charger lost.
I scrapped that this morning and reworked it.
Hehe...wiring planks in houses, too easy! So fast!
I'm used to 3D boxes in the nethers of a barge with an elbow in my armpit.
Cases/enclosures are great craic too.
Add a piece of hardware, see if the lid closes, open it, move hardware 5mm, see if lid closes...everything is metal, drill, hole, tap hole, keep fillings outtov hardware...
The My answer is MPPT twins because current limiting input.
Commissioned this evening. She's a bonnie! If I charge a battery on anything else, then stick it in here and low...there's still charging to be done...heaven's to Betsy! Almost like you can't buy anything this good!
The Remote Meter is on the Primary/Master/24V
The TriStar Meter is on the Slave/12V
If you ask me the TriStar meter works better because I get all the info without having to press buttons.
So what's in the secret sauce?
There's a 28V Meanwell 200W PSU coupled to a 20A Ebay Boost regulator set to 32V...because I didn't have a >28V power supply. This is my "utility solar panel".
The rotary cam switch switches the PSU on
and changes the input to the Master Susaver between Mains & Solar.
That feeds a DC Switch-Disconnect.
That Feeds the Solar In terminals on the Master SS MPPT.
That charges one 24V battery.
I can put a second 24V battery on the Load Terminals.
I have Load LVD set to 27V
Low voltage Reconnect 27.2V
The Load terminals of the Master SS drives a relay (complete with a flyback diode).
The Relay takes a feed from the 24V battery and sends it to the Solar In of the Slave SS MPPT.
This charges a 12V Battery.
I can charge a second 12V battery on the Load Terminals.
What if there's no 24V battery that day?
Put 12V on the Master and turn off the Slave!
The unit is for maintaining idle & single use batteries. I take them in, charge them up on mains, then switch over to solar after first float.
The Ctek is a B-rate charger. It's there to charge my son's EV.
and demountable if I want to stick it on a car. I don't use conventional mains chargers. Ctek is the best I've found and they only ok and not 24V.