If your existing electrical system is 12v like in an rv which already wired and equipped with 12v appliances then you should stick with a 12v solar system.
Mixing 12v and 24v solar panels.
Solar panels are connected in parallel to obtain higher output current.
Mixing solar panels in series total connected power 150w 150w 150w 150w 600w.
For any given load half the dc current and losses are down by.
24 volt rv solar.
So when connecting solar panels in series always try to keep the electrical properties of the solar panels identical to get the full benefit of the solar array.
You can get much bigger inverters on 24v or 48v than 12v.
0 5v line drop at 12v 4 6 supply drop whereas 0 25 v line drop at 24v 1 04 drop.
Generally a 12v solar panel should be paired with a 12v battery and a 24v solar panel should be used with a 24v battery.
There are a number advantages in opting for a higher dc supply voltage.
You may have noticed that solar panels come in both 12v and 24v.
Solar modules are connected in series to obtain higher output voltage.
Better input regulation.
12v vs 24v 12 volt vs.
The maximum system voltage however must not be exceeded.
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.
Now lets look at connecting solar panels in parallel.