Make PSS stop pulling input power when it's full.

src/main/java/gtPlusPlus/xmod/gregtech/common/tileentities/machines/multi/storage/GregtechMetaTileEntity_PowerSubStationController.java

@@ -590,7 +590,7 @@ private long drawEnergyFromHatch(MetaTileEntity aHatch) {
         long stored = aHatch.getEUVar();
         long voltage = aHatch.maxEUInput() * aHatch.maxAmperesIn();
 
-        if (voltage > stored) {
+        if (voltage > stored || (voltage + this.getEUVar() > this.mBatteryCapacity)) {
             return 0;
         }