diff --git a/src/BASICS.h b/src/BASICS.h
index 0596c64..5dc2432 100644
--- a/src/BASICS.h
+++ b/src/BASICS.h
@@ -7,7 +7,8 @@
 #define _ false
 
 #define ____ 0
-#define HALF 127
+#define QUAR 64
+#define HALF 128
 #define FULL 255
 
 #define countof(x)      (sizeof(x) / sizeof(x[0]))
diff --git a/src/display/Color.cpp b/src/display/Color.cpp
index 3be724d..b7b473a 100644
--- a/src/display/Color.cpp
+++ b/src/display/Color.cpp
@@ -8,7 +8,7 @@ const Color RED = {FULL, ____, ____};
 
 const Color GREEN = {____, FULL, ____};
 
-const Color ORANGE = {FULL, HALF, ____};
+const Color ORANGE = {FULL, QUAR, ____};
 
 const Color BLUE = {____, ____, FULL};
 
diff --git a/src/display/Display.cpp b/src/display/Display.cpp
index d51790c..9d059d6 100644
--- a/src/display/Display.cpp
+++ b/src/display/Display.cpp
@@ -99,6 +99,13 @@ bool SYMBOLS[SYMBOL_COUNT][DISPLAY_CHAR_WIDTH * DISPLAY_CHAR_HEIGHT] = {
         _, _, _,
         _, _, _,
     },
+    {
+        X, _, _,
+        _, _, X,
+        _, X, _,
+        X, _, _,
+        _, _, X,
+    },
     // this must always be the last symbol (fallback)
     {
         X, X, X,
diff --git a/src/display/Display.h b/src/display/Display.h
index 24474c9..0fd9a34 100644
--- a/src/display/Display.h
+++ b/src/display/Display.h
@@ -5,8 +5,9 @@
 #include "Adafruit_NeoPixel.h"
 #include "Vector.h"
 
-#define SYMBOL_COUNT          15
+#define SYMBOL_COUNT          16
 #define SYMBOL_DASH           13
+#define SYMBOL_PERCENT        14
 #define DISPLAY_CHAR_WIDTH    3
 #define DISPLAY_CHAR_HEIGHT   5
 
@@ -94,12 +95,12 @@ public:
         LEFT, RIGHT
     };
 
-    uint8_t print(int x, int y, double valueDbl, Color colorPositive, Color colorZero, Color colorNegative, ALIGN align = LEFT) {
+    uint8_t print2(int x, int y, double valueDbl, Color colorPositive, Color colorZero, Color colorNegative, ALIGN align = RIGHT) {
       const Color color = valueDbl == 0 ? colorZero : (valueDbl < 0 ? colorNegative : colorPositive);
-      return print(x, y, valueDbl, color, align);
+      return print2(x, y, valueDbl, color, align);
     }
 
-    uint8_t print(int x, int y, double valueDbl, Color color, ALIGN align = LEFT) {
+    uint8_t print2(int x, int y, double valueDbl, Color color, ALIGN align = RIGHT) {
       if (isnan(valueDbl)) {
         x -= 3 * (DISPLAY_CHAR_WIDTH + 1) - 1;
         x += print(x, y, SYMBOL_DASH, color, true) + 1;
@@ -140,7 +141,7 @@ public:
         return DISPLAY_CHAR_WIDTH;
       }
       if (index >= SYMBOL_COUNT) {
-        Serial.printf("Cannot print symbol #%u.\n", index);
+        Serial.printf("Cannot print2 symbol #%u.\n", index);
         index = SYMBOL_COUNT - 1;
       }
       bool *symbolBit = SYMBOLS[index];
diff --git a/src/mode.cpp b/src/mode.cpp
index 88e4a3c..8bcbba2 100644
--- a/src/mode.cpp
+++ b/src/mode.cpp
@@ -9,7 +9,8 @@
 #include "mode/Starfield/Starfield.h"
 #include "mode/Matrix/Matrix.h"
 #include "display.h"
-#include "mode/Electricity/Electricity.h"
+#include "mode/Power/Power.h"
+#include "mode/Energy/Energy.h"
 
 ModeId currentModeId = NONE;
 
@@ -109,8 +110,11 @@ void loadNewMode() {
     case MATRIX:
       mode = new Matrix(display);
       break;
-    case ELECTRICITY:
-      mode = new Electricity(display);
+    case POWER:
+      mode = new Power(display);
+      break;
+    case ENERGY:
+      mode = new Energy(display);
       break;
     default:
       Serial.print("No mode loaded.\n");
diff --git a/src/mode/Energy/Energy.h b/src/mode/Energy/Energy.h
new file mode 100644
index 0000000..7d35cb4
--- /dev/null
+++ b/src/mode/Energy/Energy.h
@@ -0,0 +1,71 @@
+#ifndef MODE_ENERGY_H
+#define MODE_ENERGY_H
+
+#include "mode/Mode.h"
+#include "mqtt.h"
+
+#define POWER_PHOTOVOLTAIC_PRODUCED_BEFORE_METER_CHANGE     287.995
+#define PV_COST_TOTAL_EURO                                        576.52
+#define GRID_KWH_EURO                                             0.33
+#define PV_COST_AMORTISATION_KWH                                  ( PV_COST_TOTAL_EURO / GRID_KWH_EURO )
+
+class Energy : public Mode {
+
+private:
+
+    int page = 0;
+
+public:
+
+    explicit Energy(Display &display) :
+        Mode(display) {
+      timer(0, 7000);
+    }
+
+    const char *getName() override {
+      return "Energy";
+    }
+
+protected:
+
+    void tick(uint8_t index, microseconds_t microseconds) override {
+      page = (page + 1) % 3;
+    }
+
+    void step(microseconds_t microseconds) override {
+      if (realtimeChanged) {
+        markDirty();
+      }
+    }
+
+    void draw(Display &display) override {
+      const double produced = getPhotovoltaicEnergyKWh();
+      const double imported = getGridImportKWh();
+      const double exported = getGridExportKWh();
+      const double producedAfterMeterChange = produced - POWER_PHOTOVOLTAIC_PRODUCED_BEFORE_METER_CHANGE;
+      const double selfAfterMeterChange = producedAfterMeterChange - exported;
+      const double selfRatio = selfAfterMeterChange / producedAfterMeterChange;
+      const double selfConsumedKWh = selfRatio * produced;
+      const double costSaved = selfConsumedKWh * GRID_KWH_EURO;
+      const double amortisationPercent = selfConsumedKWh / PV_COST_AMORTISATION_KWH * 100;
+
+      const uint8_t l = (DISPLAY_CHAR_WIDTH + 1) * 4 - 1;
+      const uint8_t r = width;
+
+      display.clear();
+      if (page == 0) {
+        display.print2(l, 0, costSaved, GREEN);
+        uint8_t x = display.print2(r - DISPLAY_CHAR_WIDTH - 1, 0, amortisationPercent, WHITE);
+        display.print(x, 0, SYMBOL_PERCENT, WHITE, true);
+      } else if (page == 1) {
+        display.print2(l, 0, getPhotovoltaicEnergyKWh(), BLUE);
+        display.print2(r, 0, selfConsumedKWh, GREEN);
+      } else {
+        display.print2(l, 0, imported, ORANGE);
+        display.print2(r, 0, exported, MAGENTA);
+      }
+    }
+
+};
+
+#endif
diff --git a/src/mode/Mode.h b/src/mode/Mode.h
index c74ffe4..e59b1a9 100644
--- a/src/mode/Mode.h
+++ b/src/mode/Mode.h
@@ -23,7 +23,8 @@ enum ModeId {
     COUNT_DOWN_BARS,
     STARFIELD,
     MATRIX,
-    ELECTRICITY,
+    POWER,
+    ENERGY,
 };
 
 class Mode {
diff --git a/src/mode/Electricity/Electricity.h b/src/mode/Power/Power.h
similarity index 55%
rename from src/mode/Electricity/Electricity.h
rename to src/mode/Power/Power.h
index 793642c..cd0dc1c 100644
--- a/src/mode/Electricity/Electricity.h
+++ b/src/mode/Power/Power.h
@@ -1,5 +1,5 @@
-#ifndef MODE_ELECTRICITY_H
-#define MODE_ELECTRICITY_H
+#ifndef MODE_POWER_H
+#define MODE_POWER_H
 
 #include "mode/Mode.h"
 #include "mqtt.h"
@@ -7,17 +7,17 @@
 #pragma clang diagnostic push
 #pragma ide diagnostic ignored "UnusedValue"
 
-class Electricity : public Mode {
+class Power : public Mode {
 
 public:
 
-    explicit Electricity(Display &display) :
+    explicit Power(Display &display) :
         Mode(display) {
       // nothing
     }
 
     const char *getName() override {
-      return "Electricity";
+      return "Power";
     }
 
 protected:
@@ -30,8 +30,8 @@ protected:
 
     void draw(Display &display) override {
       display.clear();
-      display.print((DISPLAY_CHAR_WIDTH + 1) * 3 - 1, 0, getPhotovoltaicPowerW(), GREEN, Color(), Color(), Display::RIGHT);
-      display.print(width, 0, getGridPowerW(), ORANGE, WHITE, MAGENTA, Display::RIGHT);
+      display.print2((DISPLAY_CHAR_WIDTH + 1) * 3 - 1, 0, getPhotovoltaicPowerW(), GREEN);
+      display.print2(width, 0, getGridPowerW(), ORANGE, WHITE, MAGENTA);
     }
 
 };
diff --git a/src/mqtt.cpp b/src/mqtt.cpp
index 13e2d25..3a0d43f 100644
--- a/src/mqtt.cpp
+++ b/src/mqtt.cpp
@@ -8,9 +8,11 @@
 
 #define MQTT_MAX_MESSAGE_AGE_MILLIS         11000
 
-#define PHOTOVOLTAIC_POWER                  "openDTU/pv/ac/power"
-
-#define GRID_POWER                          "electricity/grid/power/signed/w"
+#define PHOTOVOLTAIC_POWER_W                "openDTU/pv/ac/power"
+#define PHOTOVOLTAIC_ENERGY_KWH             "openDTU/pv/ac/yieldtotal"
+#define GRID_POWER_W                        "electricity/grid/power/signed/w"
+#define GRID_IMPORT_WH                      "electricity/grid/energy/import/wh"
+#define GRID_EXPORT_WH                      "electricity/grid/energy/export/wh"
 
 WiFiClient espClient;
 
@@ -24,10 +26,22 @@ double photovoltaicPowerW = NAN;
 
 unsigned long photovoltaicPowerWLast = 0;
 
+double photovoltaicEnergyKWh = NAN;
+
+unsigned long photovoltaicEnergyKWhLast = 0;
+
 double gridPowerW = NAN;
 
 unsigned long gridPowerWLast = 0;
 
+double gridImportKWh = NAN;
+
+unsigned long gridImportKWhLast = 0;
+
+double gridExportKWh = NAN;
+
+unsigned long gridExportKWhLast = 0;
+
 void mqttDisconnect();
 
 void mqttCallback(char *topic, uint8_t *payload, unsigned int length) {
@@ -38,12 +52,21 @@ void mqttCallback(char *topic, uint8_t *payload, unsigned int length) {
   }
   memcpy(message, payload, length);
   message[length] = 0;
-  if (strcmp(PHOTOVOLTAIC_POWER, topic) == 0) {
+  if (strcmp(PHOTOVOLTAIC_POWER_W, topic) == 0) {
     photovoltaicPowerW = strtod(message, nullptr);
     photovoltaicPowerWLast = millis();
-  } else if (strcmp(GRID_POWER, topic) == 0) {
+  } else if (strcmp(PHOTOVOLTAIC_ENERGY_KWH, topic) == 0) {
+    photovoltaicEnergyKWh = strtod(message, nullptr);
+    photovoltaicEnergyKWhLast = millis();
+  } else if (strcmp(GRID_POWER_W, topic) == 0) {
     gridPowerW = strtod(message, nullptr);
     gridPowerWLast = millis();
+  } else if (strcmp(GRID_IMPORT_WH, topic) == 0) {
+    gridImportKWh = strtod(message, nullptr) / 1000;
+    gridImportKWhLast = millis();
+  } else if (strcmp(GRID_EXPORT_WH, topic) == 0) {
+    gridExportKWh = strtod(message, nullptr) / 1000;
+    gridExportKWhLast = millis();
   }
 }
 
@@ -59,8 +82,11 @@ void mqtt_loop() {
     if (mqttConnected) {
       Serial.printf("Successfully connected mqtt broker at %s:%d\n", "10.0.0.50", 1883);
       mqtt.setCallback(mqttCallback);
-      mqtt.subscribe(PHOTOVOLTAIC_POWER);
-      mqtt.subscribe(GRID_POWER);
+      mqtt.subscribe(PHOTOVOLTAIC_POWER_W);
+      mqtt.subscribe(PHOTOVOLTAIC_ENERGY_KWH);
+      mqtt.subscribe(GRID_POWER_W);
+      mqtt.subscribe(GRID_IMPORT_WH);
+      mqtt.subscribe(GRID_EXPORT_WH);
     } else {
       Serial.printf("ERROR: Failed to connect MQTT broker at %s:%d\n", "10.0.0.50", 1883);
       mqttDisconnect();
@@ -86,9 +112,30 @@ double getPhotovoltaicPowerW() {
   return photovoltaicPowerW;
 }
 
+double getPhotovoltaicEnergyKWh() {
+  if (millis() - photovoltaicEnergyKWhLast > MQTT_MAX_MESSAGE_AGE_MILLIS) {
+    return NAN;
+  }
+  return photovoltaicEnergyKWh;
+}
+
 double getGridPowerW() {
   if (millis() - gridPowerWLast > MQTT_MAX_MESSAGE_AGE_MILLIS) {
     return NAN;
   }
   return gridPowerW;
 }
+
+double getGridImportKWh() {
+  if (millis() - gridImportKWhLast > MQTT_MAX_MESSAGE_AGE_MILLIS) {
+    return NAN;
+  }
+  return gridImportKWh;
+}
+
+double getGridExportKWh() {
+  if (millis() - gridExportKWhLast > MQTT_MAX_MESSAGE_AGE_MILLIS) {
+    return NAN;
+  }
+  return gridExportKWh;
+}
diff --git a/src/mqtt.h b/src/mqtt.h
index 485d326..189c25a 100644
--- a/src/mqtt.h
+++ b/src/mqtt.h
@@ -5,6 +5,12 @@ void mqtt_loop();
 
 double getPhotovoltaicPowerW();
 
+double getPhotovoltaicEnergyKWh();
+
 double getGridPowerW();
 
+double getGridImportKWh();
+
+double getGridExportKWh();
+
 #endif
diff --git a/src/server.cpp b/src/server.cpp
index 74875fc..7c26226 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -105,7 +105,8 @@ void web_index() {
   server.sendContent(R"(<a onclick="get('/mode?mode=10');">COUNT_DOWN_BARS</a><br>)");
   server.sendContent(R"(<a onclick="get('/mode?mode=11');">STARFIELD</a><br>)");
   server.sendContent(R"(<a onclick="get('/mode?mode=12');">MATRIX</a><br>)");
-  server.sendContent(R"(<a onclick="get('/mode?mode=13');">ELECTRICITY</a><br>)");
+  server.sendContent(R"(<a onclick="get('/mode?mode=13');">POWER</a><br>)");
+  server.sendContent(R"(<a onclick="get('/mode?mode=14');">ENERGY</a><br>)");
   server.sendContent(R"(</p>)");
 
   server.sendContent(R"(<p>)");