Skylane 182/RG Turbo Skylane/RG
Flight Crew Instrument; Flight Crew Private
Flight Crew Last 90 Days 40; Flight Crew Total 179; Flight Crew Type 15
Troubleshooting
ATC Issue All Types; Aircraft Equipment Problem Critical
Air Traffic Control Provided Assistance; Flight Crew Landed As Precaution
Aircraft
We were on an IFR flight plan at 8;000 [feet] about to fly over ZZZ when we were instructed to climb to 10;000 [feet] . When we were responding but they were unable to receive our coms. As we started to climb we kept trying to reach them. They had airlines trying to reach us and when we tried to squawk our transponder had shut down. We then started to lose navigation and alt. Inop light came on. We tried to trouble shoot the battery as well as turned off all our electrical load. While VMC We spotted ZZZ airport; and decide to circle and land. We believe our complete system malfunction was due to a alternator failure.
We had an aircraft malfunction which caused errors in our radios; transponder; and navigation equipment. We had lost communication but due to the transponder malfunctioning as well we were unable to squawk the appropriate codes. Although we were on an IFR flight plan we were in VMC at the time we had the malfunction and descended to an airport which was in sight. During this we figured the issue was alternator failure along with some other issue down the line in the electrical system. We called flight service on our cell phone in flight to let them know about the issue. Basically we were at 8;000 [feet] and were told by ATC to climb to 10;000 [feet] but we were unable to transmit on the radio. We went to squawk missed com code but the transponder was unresponsive as well. At this point we began to climb to the altitude ATC had requested but then when we saw the airport in sight decided to land and told Flight Service of our intentions over the phone.
C182 pilot reported electrical problems and landed at alternate airport.