diff --git a/conf/messages.xml b/conf/messages.xml
index 693fdd0511..d703536005 100644
--- a/conf/messages.xml
+++ b/conf/messages.xml
@@ -338,6 +338,7 @@
     <field name="bat"      type="float" unit="V"/>
     <field name="amp"      type="float" unit="A"/>
     <field name="energy"   type="uint16" unit="Wh"/>
+    <field name="power"   type="float" unit="W"/>
   </message>
 
  <message name="WINDTURBINE_STATUS_" id="50">
diff --git a/sw/airborne/ap_downlink.h b/sw/airborne/ap_downlink.h
index a1fb951503..940a4dab43 100644
--- a/sw/airborne/ap_downlink.h
+++ b/sw/airborne/ap_downlink.h
@@ -183,7 +183,7 @@
 #define PERIODIC_SEND_AIRSPEED(_chan) {}
 #endif
 
-#define PERIODIC_SEND_ENERGY(_chan) Downlink({ int16_t e = energy; float vsup = ((float)vsupply) / 10.0f; float curs = ((float) current)/1000.0f;  DOWNLINK_SEND_ENERGY(_chan, &vsup, &curs, &e); })
+#define PERIODIC_SEND_ENERGY(_chan) Downlink({ const int16_t e = energy; const float vsup = ((float)vsupply) / 10.0f; const float curs = ((float) current)/1000.0f;  const float power = vsup * curs; DOWNLINK_SEND_ENERGY(_chan, &vsup, &curs, &e, &power); })
 
 
 #include "fw_h_ctl_a.h"