Narrative:

I just had ads-B installed and was climbing out from ZZZ to return to home base. Suddenly developed high voltage alarm; followed soon after by low voltage alarm. As I assessed the situation; further alarms sounded and I decided to return to ZZZ. I changed com frequency back to ZZZ; and transmitted 5 miles south for landing. An extremely garbled transmission reply from other traffic was my first realization I would be out of communication. I knew there was traffic; but I didn't know where it was. I tried to reset transponder to 'can't talk'; but entered 7;500 by mistake. By then glass panel items started shutting down- I didn't have time to correct. Instruments showed no voltage being generated. I shed some load trying to restore power-didn't work. Hand held transceiver didn't work. GPS tis-a showed something on straight in approach; which I visually identified as a jet who was already doing a go around (not a near miss). I turned base and landed hot. As I expected would have been the case; the engine kept running. On the ground; battery was too weak to even restart the engine to show the [maintenance technician]. Some sort of catastrophic failure. I punched in wrong transponder code and didn't have time to change to 7600 or 7700. Except for that error; I think I did pretty good. In high gust conditions I needed to get on the ground before the airspeed indicator shut down. I bounced the high speed no (electric) flaps landing pretty bad. I do check the hand held batteries regularly; but they were dead. Need to check before each flight. I had someone apologize to the jet; but he said he never saw me; even though I had a just installed ads-B out. He was notified by someone on the ground.

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Original NASA ASRS Text

Title: LSA pilot reported returning to the departure airport following an electrical system malfunction.

Narrative: I just had ADS-B installed and was climbing out from ZZZ to return to home base. Suddenly developed High voltage alarm; followed soon after by low voltage alarm. As I assessed the situation; further alarms sounded and I decided to return to ZZZ. I changed com frequency back to ZZZ; and transmitted 5 miles south for landing. An extremely garbled transmission reply from other traffic was my first realization I would be out of communication. I knew there was traffic; but I didn't know where it was. I tried to reset transponder to 'can't talk'; but entered 7;500 by mistake. By then glass panel items started shutting down- I didn't have time to correct. Instruments showed no voltage being generated. I shed some load trying to restore power-didn't work. Hand held transceiver didn't work. GPS TIS-A showed something on straight in approach; which I visually identified as a jet who was already doing a go around (not a near miss). I turned base and landed hot. As I expected would have been the case; the engine kept running. On the ground; battery was too weak to even restart the engine to show the [maintenance technician]. Some sort of catastrophic failure. I punched in wrong transponder code and didn't have time to change to 7600 or 7700. Except for that error; I think I did pretty good. In high gust conditions I needed to get on the ground before the airspeed indicator shut down. I bounced the high speed no (electric) flaps landing pretty bad. I do check the hand held batteries regularly; but they were dead. Need to check before each flight. I had someone apologize to the jet; but he said he never saw me; even though I had a just installed ADS-B OUT. He was notified by someone on the ground.

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.