17-12-2019, 10:21 PM
The industry changed to 12 volt as more electrical items were added, and lights got brighter etc. For the same (increased) wattage a 12 volt system uses less amps, so thinner cables. And as compression ratios increased starter motors needed more power. Power is watts, amps x volts. So 12 volts does the business with powerful headlights, heater blower, more lights etc.
When heated rear screens came along the dynamo couldn't cope so alternators became normal.
When heated rear screens came along the dynamo couldn't cope so alternators became normal.