Solar - How much charge do you get? Is this about right?

[grmaryp]

I’ve got a large flat solar panel linked to two batteries. How would I find out the wattage please as there is no documentation for the solar setup. The van is an 04 so it is not very techie.

If you have connected an inverter with the batteries, the inverter will indicate "charging" and "fully charged" status. I'm sure, some intelligent inverters will give more information on power usages.