So just use the solar to charge the 12v battery instead of charging 24v and then use a boost converter to power the rest.
Can you charge 24v battery with 12v solar panel.
An important point to be noted here is that a 24v rating battery is not available in the market but you can create one by joining two 12v batteries in a series connection.
However since you have 12v loads it makes sense to have a 12v battery bank with the 2 batteries wired in parallel.
Let s say you want to compute for the average charging time of a system with a 12v battery with 50 ah capacity and a 15 watts solar panel.
Connect battery to charge controller.
If it is 72 cells and voc of around 44v then it is a 24v solar panel and can charge a 24v battery.
Connecting a solar panel to a 12 volt battery is not a hard thing to do.
Generally a 12v solar panel should be paired with a 12v battery and a 24v solar panel should be used with a 24v battery.
These panels are great for charging your 12 or 24 volt batteries.
The first thing you have to do it to compute for the ampere rating of the solar panel by following the equation below.
I will also share a few tips you need to know along the way.
Daniel yantis apr 27 17 at 20 38 show 2 more comments.
I could use a zener diode or 7612 to keep the solar charge voltage at 12v constant unless sun is down.