The wiring diagrams show only the supply side installation of a 600 watt solar panel system. They go as far as charging the battery. For the load side detail, check out our post on campervan wiring. They exclude charging the battery from shore power or the alternator.
Therefore, a 600w solar panel system will generate a maximum of 250-300ah daily. Although you may use some of that energy as you generate it, it’s more simple and prudent to err on the side of caution. So the minimum size battery bank you need for a 600w setup is 300ah – more if you don’t install Lithium batteries.
How much 600w solar power systems can support depends on several variables, including the time of year, the weather, your location, and the type of charge controller you install. But here’s an idea of what you might expect to get on an average day of 4 peak hours of sun with an MPPT controller.
Five 100w panels would be within normal limits. As a general rule over paneling @ +10% watts is fine. Or, you could series connect your 12v batteries to to a 24v battery bank (plus a battery balancer and a step down 24v to 12v converter) and you would be able to handle 960w PVs (over paneling to 1050w).
Assuming your 100 watt PVs are Renogy's, each PV has a 24.3v VOC and 4.91a IMP. With 3S2P wiring, the output to the SCC will be 72.9v* and 9.82a (@~100%). Assuming your Renogy is a 100/40 SCC, it is OK. However, with your 12v battery bank, the maximum PV wattage is 12v x 40a = 480watts (Watt's Law). Five 100w panels would be within normal limits.
In theory 600W of solar at 12V could support up to 50A of charge current. This means that your 40A controller can’t take full advantage of all 600W. But given that your panels are flat mounted on the RV roof you will rarely get the full 600W.