12v Or 24v Solar Panels
But be careful as solar panels output a large direct current even for 24v.
12v or 24v solar panels. You can get much bigger inverters on 24v or 48v than 12v. Using a 24 volt supply instead of a 12 volt supply greatly reduces the wiring cost to almost half the original cost. 24v panel 24v 2 12v batteries in series connection. A 12v dc system with a tiny inverter is difficult if not impossible to upgrade upsize.
Using a 12v solar system is recommended when you need to run your appliances directly from batteries. Yes the 24 volt solar panels can charge and maintain all of the 12v batteries but you should have the solar controllers between the solar panels and the batteries. In recent years inverters and solar panels have become more efficient and a lot more affordable. This was achieved by using 12v or 24v appliances lighting that do not require an inverter.
In addition most customers seem to want more power over the years. There are a number advantages in opting for a higher dc supply voltage. You could use a voltmeter or a multimeter setup to measure voltage. Generally a 12v solar panel should be paired with a 12v battery and a 24v solar panel should be used with a 24v battery.
In recent years inverters and solar panels have become more efficient and a lot more affordable. A 12v dc system with a tiny inverter is difficult if not impossible to upgrade upsize. Most rv appliances operate on 12 volt systems making this the most compatible and therefore making 24 volt systems unnecessary or even counterproductive for use on recreational vehicles. This is so because increasing the voltage of a system causes a reduction in the current through it and in turn reduces the size of the wires you need.
Overall 12v is safer for dc circuits as opposed to 24v. In addition most customers seem to want more power over the years.