Cessna 210 Centurion / Turbo Centurion 210C; 210D
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Instructor; Flight Crew Multiengine
Flight Crew Last 90 Days 30; Flight Crew Total 14500; Flight Crew Type 600
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
Air Traffic Control Provided Assistance; Aircraft Aircraft Damaged; Flight Crew Landed in Emergency Condition; Flight Crew Requested ATC Assistance / Clarification; General Flight Cancelled / Delayed; General Maintenance Action
Aircraft
I departed out of ZZZ for a flight back to ZZZ1.  We climbed up to 7;500 ft and asked for flight following from approach; which we got.  After passing ZZZ2 we cancelled service and descended to 2;500 feet. After a while I noticed the voltage was lower than normal and the alternator charge indicator was showing a discharge.  The low voltage light never came on.  I got out the POH and went through the procedure to attempt the reset the alternator.  It did not reset.  I reviewed the manual gear extension procedure just in case I needed to use it.  I shut off all nonessential radios and electrical equipment as called for in the POH.  I wasn't sure if I would have communication with a weak battery so to preserve what was left in the battery; I shut off the master switch.  I doing that; I got to thinking; I didn't have the ADS-B output normally required. I continued on the ZZZ1 as planned; avoiding controlled airspace and any airports along my path.  when I got within about 15 mins of ZZZ1; I turned the battery master and Avionic master back on. I extended the landing gear and called ZZZ1 tower; explaining I had an alternator failure and requested clearance to land.  They offered runway XXL which I declined.  (Major tailwind; gusts to 20 knot) flew a normal pattern and landed on runway YYR without incident.I continued on to ZZZ1 because of the knowledge of the area; traffic flows and airports if I could not talk to ZZZ1 tower.  If this would have happened at night; I would have landed at the first airport with lights.A broken alternator field wire at the connector was found the next day.
Cessna 210 pilot reported loss of electrical power and elected to continue to destination airport and execute a precautionary landing.