add console message when limit is scaled but the current limit was kept

src/PowerLimiter.cpp

@@ -741,7 +741,12 @@ int32_t PowerLimiterClass::scalePowerLimit(std::shared_ptr<InverterAbstract> inv
 
         // keep the currentLimit when all channels are shaded and we get the
         // expected AC power or less.
-        if (dcShadedChnls == dcTotalChnls && inverterOutputAC <= newLimit) { return currentLimitWatts; }
+        if (dcShadedChnls == dcTotalChnls && inverterOutputAC <= newLimit) {
+            MessageOutput.printf("[DPL::scalePowerLimit] all channels are producing less than expected, "
+                "keeping the current limit of %d W instead of %d W by \r\n", currentLimitWatts, newLimit);
+
+            return currentLimitWatts;
+        }
 
         size_t dcNonShadedChnls = dcTotalChnls - dcShadedChnls;
         auto overScaled = static_cast<int32_t>((newLimit - shadedChannelACPowerSum) / dcNonShadedChnls * dcTotalChnls);