…is my solution described further up the discussion.
Hi, I’m back again !!
I’ve now relocated and updated my solar PV system, installing four Powerline 100Ah wet Leisure batteries from Tayna Batteries in a ventilated outside cabinet, two pairs giving a nominal terminal voltage of 24v. I’ve expanded the monitoring to include both current and voltage for all four batteries to hopefully give me early warning of any future problems. As I now have access to all four battery voltages I’ve also added outputs to allow me to add battery balancing at a future date, when time allows and I’ve worked out exactly how to manage it.
This time I’ve not included the overnight charge on low tarrif electric, instead I’ve opted to transfer the load to a UPS supported mains power supply if and when the battery voltage drops to a preset level, yet to be determined. The base load is around 1.5 amps at 24v.
It’s all running as expected, the only question I have is regarding the Powerline 100Ah Leisure batteries. I can’t find any data for these batteries online, so my question is what settings should I use in the Victron MPPT charger, the preset settings don’t appear to include any settings for wet lead acid batteries. At present it’s on the factory default, which seems to be ‘Gel Victron deep discharge (2)’, Absorption voltage 28.8v, Float voltage 27.6v, Equalizatin voltage 32.4v. Automatic equalization is disabled and temperature compensation set to -32.4mV/degC with no low temperature cut off.
Should I create a new preset in the charger and change any of these settings ? Any help would be welcome as I want to try and maximise the life of these batteries if possible, hopefully to more than the three years I got from the previous set !
Regards
PaulM