Check your solar inverter's communication ports right now – if you see two screw terminals labeled A and B (or D+ and D-), you're looking at 2-wire RS485, the most common communication protocol in DIY solar monitoring setups.
When asking "how many watts does a single crystal photovoltaic panel have," the answer isn't one-size-fits-all. Modern panels average 350–450 watts, with high-efficiency models reaching 500+ watts.