disable restarting solar-powered inverters

now that users can tell the DPL that their inverter is not powered by a
battery but powered by solar panels, we shall not restart inverters to
reset the daily yield value, if they are solar powered. these inverters
will reboot every night by themselves.

src/PowerLimiter.cpp

@@ -804,6 +804,12 @@ void PowerLimiterClass::calcNextInverterRestart()
         return;
     }
 
+    if (config.PowerLimiter.IsInverterSolarPowered) {
+        _nextInverterRestart = 1;
+        MessageOutput.println("[DPL::calcNextInverterRestart] not restarting solar-powered inverters");
+        return;
+    }
+
     // read time from timeserver, if time is not synced then return
     struct tm timeinfo;
     if (getLocalTime(&timeinfo, 5)) {