I have 1 24v system, Multiplus II 24V/3000W inverter charger with the smart shunt, SC 150/85 using a Raspberry Pi 3 with Venus OS. I had firmware 2711510 and updated to 556 this morning and this changed something that I cant figure out.
I use to be able to start my generator and have the Inverter/Charger push about 65A to the battery. After the update now I cant get almost anything, it was showing 4A. I installed the VEConfigure software on my laptop and connected the MK2 cable to be able to read and write settings. I never did change anything here in the past.
I downgraded back to the 510 firmware but I guess there is something that changed that now I can only get 45A charge at times. Is there a charge amperage limit that I can change to go back up to the full charging?
Sometimes updating firmware resets the charging voltage to 24V for a nominal 24V battery to make sure on restart nothing untoward happens. The procedure if followed to the letter is usually download settings, update firmware, update settings, reload settings. Many people miss out the final steps. Check your absorption and float voltages and correct them if required.
I had never went into veconfig so I had saved my settings from what I had changed when installing the system last year. Doind some testing this morning, it seems that my system wants to limit charging to only 40a. my SCC is currently pushing about 10A and when I start my generator the combined charge A is only 40. Disconnecting the solar panels, my generator started working harder and the victron graph kept the 40A range.
I can not see anything wrong. V556 was meant to improve generator charging so there may have been changes internally in the firmware that do not have associated settings.
Other things are checking DVCC menu in the Rpi for settings limiting the charge current and/or voltage or make sure you have not got a low shorepower limit set in the Rpi.
Have you tried the enabling “Weak AC input” setting on the charger page.
