See earlier post : Sept. 22, 2014 12:06 a.m. DEAD BATTERY FIX Picked up my ENERGI today Sept. 24, 2014 after Service Tech. located part of the wiring harness going to the rear battery fans had rubbed the insulation off wire shorting out --- causing the fans to run sometimes after car turned off ---draining the 12 volt battery. This information furnished as stated below by the Service Tech. on the Warranty Repair Invoice. Checked battery condition and recharged, IDS Diag, Low Voltage codes in several modules, checked for draw, less than 50 milliamps, test drove and charged with 240V several times to try and recreate drain on 12 volt system. ....After several days of attempts, FOUND HVB COOLING FAN STAYING ON AFTER VEHICLE IS TURNED OFF. REMOVED TRUNK LINER TO ACCESS FAN AND HVB. FOUND SHORT TO GROUND ON PULSE WIDTH COMMAND WIRE TO HVB. REPAIRED HARNESS AND INSULATE HARNESS TO KEEP FROM CHAFING AGAIN. REPAIRED CIRCUIT ---VYB18 WH-GN. Retested all systems and released vehicle to customer. Service Dept. Tech stated he felt 90 % sure this was the problem with my-- continuing-- Ford Fusion Energi Dead 12 volt battery issue . I'll report back later to advise if this FIX-- in fact-- WORKED. As stated above, I have had my Energi in service almost everyday for approx. 15 months and my dead battery issue JUST started on Sept. 5, 2014. Guess the wiring had enough time to rub against something to chaf and short. Sept. 27 2014 Dead 12 volt Battery problem appears to have been fixed thanks to a very sharp mechanic at Mooresville Ford.