I found another person in this forum with the same question, but I have a different system.
I have a smartsolar 75/15 and a 30w/18v solar panel being delivered soon and I also read the manual about the charging not starting till it gets 5v over the battery.
So I wondered if I could use 2 panels in series to reach over the 18v needed to start charging the lithium.
This is my proposed system :
The 30w panel is this one here :
I bought the 20w panel in 2017. It’s this same one :
https://mo.eco-worthy.com/catalog/worthy-epoxy-solar-panel-solar-charger-controller-battery-clip-camp-power-p-667.html
So the victron will get power from both panels and the lead acid only power from one.
The lead acid is my car starter battery which only needs a tiny trickle charge over days and the lithium is only 8ah and is for occasionally powering 2 dashcams when out the car.
So I’m not asking for a lot of current overall.
Both batteries will be charged when driving separately from this system.
Or should I power both controllers using both panels in series?
Will that confuse both controllers?
The pwm controller takes 41v max so going by the max voc of both panels in series that could go over 41 but, at the same time, the victron would be drawing some volts.
I’m giving priority to the lithium as that’s the only one I am using as a load.
The dashcams will be powered directly from the victron load connecters so I can adjust how long they stay on for etc. using the victron connect app.