Fix: Huawei PSU: enforce BatterySoC Limit < 100 in UI (#992)

Author: eu-gh

src/Huawei_can.cpp

@@ -389,8 +389,10 @@ void HuaweiCanClass::loop()
         MessageOutput.printf("[HuaweiCanClass::loop] newPowerLimit: %f, output_power: %f \r\n", newPowerLimit, _rp.output_power);
       }
 
+      // Check whether the battery SoC limit setting is enabled
       if (config.Battery.Enabled && config.Huawei.Auto_Power_BatterySoC_Limits_Enabled) {
         uint8_t _batterySoC = Battery.getStats()->getSoC();
+        // Sets power limit to 0 if the BMS reported SoC reaches or exceeds the user configured value
         if (_batterySoC >= config.Huawei.Auto_Power_Stop_BatterySoC_Threshold) {
           newPowerLimit = 0;
           if (verboseLogging) {
@@ -427,7 +429,7 @@ void HuaweiCanClass::loop()
         float calculatedCurrent = efficiency * (newPowerLimit / _rp.output_voltage);
 
         // Limit output current to value requested by BMS
-        float permissableCurrent = stats->getChargeCurrentLimitation() - (stats->getChargeCurrent() - _rp.output_current); // BMS current limit - current from other sources
+        float permissableCurrent = stats->getChargeCurrentLimitation() - (stats->getChargeCurrent() - _rp.output_current); // BMS current limit - current from other sources, e.g. Victron MPPT charger
         float outputCurrent = std::min(calculatedCurrent, permissableCurrent);
         outputCurrent= outputCurrent > 0 ? outputCurrent : 0;
 

webapp/src/views/AcChargerAdminView.vue

@@ -112,7 +112,7 @@
                             <div class="input-group">
                                 <input type="number" class="form-control" id="stopBatterySoCThreshold"
                                     placeholder="95" v-model="acChargerConfigList.stop_batterysoc_threshold"
-                                    aria-describedby="stopBatterySoCThresholdDescription" min="2" max="100" required/>
+                                    aria-describedby="stopBatterySoCThresholdDescription" min="2" max="99" required/>
                                     <span class="input-group-text" id="stopBatterySoCThresholdDescription">%</span>
                             </div>
                         </div>