Fix: Don't check shading for max increase when inverter limit is belo…

…w 15%

src/PowerLimiterSolarInverter.cpp

@@ -27,6 +27,14 @@ uint16_t PowerLimiterSolarInverter::getMaxIncreaseWatts() const
         return maxTotalIncrease;
     }
 
+    // when the current limit is less than 15% of the max power of the inverter
+    // the output will not match the limit as the inverters are not able to work
+    // with those low limits. In this case we assume that the inverter is able to
+    // provide more power and we return the maximum possible increase.
+    // thanks spcqike for creating a table that can be found here:
+    // https://github.com/hoylabs/OpenDTU-OnBattery/issues/1087#issuecomment-2216787552
+    if (getCurrentLimitWatts() < getInverterMaxPowerWatts() * 0.15) { return maxTotalIncrease; }
+
     auto pStats = _spInverter->Statistics();
     std::vector<MpptNum_t> dcMppts = _spInverter->getMppts();
     size_t dcTotalMppts = dcMppts.size();
@@ -37,7 +45,7 @@ uint16_t PowerLimiterSolarInverter::getMaxIncreaseWatts() const
     auto expectedPowerPercentage = 0.97;
 
     // use the scaling threshold as the expected power percentage if lower,
-    // but only when overscalingis enabled and the inverter does not support PDL
+    // but only when overscaling is enabled and the inverter does not support PDL
     if (_config.UseOverscaling && !_spInverter->supportsPowerDistributionLogic()) {
         expectedPowerPercentage = std::min(expectedPowerPercentage, static_cast<float>(_config.ScalingThreshold) / 100.0);
     }