Narrative:

Flight was begun from ZZZ to ZZZ1 via ZZZ2. The flight was uneventful through indiana however after checking in with ZZZ3; north of ZZZ4; at 6;000 ft.; intermittent radar reception was noted and the transponder was recycled. Transponder recycling had been requested approximately two times earlier from south bend and on. After communicating with ZZZ3; radios flickered and then all instruments went dark related to electrical instruments.six thousand feet altitude was maintained and headings were continued using compass headings as well as ipad GPS. IMC conditions were noted; and course deviations were kept as minimal as possible through ZZZ4 airspace. Transponder was switched to 7600 as communication was not possible. Master switch was left in the off position and recycling of the master after approximately 10 minutes gave a 5 to 10 second source of power which then was gone again. It was evident that likely issue was alternator failure and now battery failure.it was elected to land as soon as practical and expected conditions ahead of us towards ZZZ5 would keep us in IFR and possibly icing conditions; therefore practical landing plan was to ZZZ6. A left hand 90deg turn was made directly to ZZZ6 and altitude was maintained at level 3;000 ft. To be in VFR and until the field was visually located. Green light signal from the tower indicated landing permission. A no flap visual approach to runway xx left was performed without incident. Landing gear was extended manually per protocol. The tower was immediately called after arrival to cancel IFR and explain the mechanical situation. The plane was transferred to [FBO] for evaluation and likely repair of suspected alternator failure. IFR clearance and flight plan was formally canceled with ZZZ6 tower.ZZZ6 tower verified that ZZZ5 approach had called them and they were expecting our arrival.

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Original NASA ASRS Text

Title: C182 Pilot reported that an alternator failure resulted in a loss of communications and a diversion.

Narrative: Flight was begun from ZZZ to ZZZ1 via ZZZ2. The flight was uneventful through Indiana however after checking in with ZZZ3; north of ZZZ4; at 6;000 ft.; intermittent radar reception was noted and the transponder was recycled. Transponder recycling had been requested approximately two times earlier from South Bend and on. After communicating with ZZZ3; radios flickered and then all instruments went dark related to electrical instruments.Six thousand feet altitude was maintained and headings were continued using Compass headings as well as iPad GPS. IMC conditions were noted; and course deviations were kept as minimal as possible through ZZZ4 airspace. Transponder was switched to 7600 as communication was not possible. Master switch was left in the off position and recycling of the master after approximately 10 minutes gave a 5 to 10 second source of power which then was gone again. It was evident that likely issue was alternator failure and now battery failure.It was elected to land as soon as practical and expected conditions ahead of us towards ZZZ5 would keep us in IFR and possibly icing conditions; therefore practical landing plan was to ZZZ6. A left hand 90deg turn was made directly to ZZZ6 and altitude was maintained at level 3;000 ft. to be in VFR and until the field was visually located. Green light signal from the tower indicated landing permission. A no flap visual approach to Runway XX left was performed without incident. Landing gear was extended manually per protocol. The tower was immediately called after arrival to cancel IFR and explain the mechanical situation. The plane was transferred to [FBO] for evaluation and likely repair of suspected alternator failure. IFR clearance and flight plan was formally canceled with ZZZ6 Tower.ZZZ6 Tower verified that ZZZ5 Approach had called them and they were expecting our arrival.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.