Quote Originally Posted by coombro View Post
Ah yet you need to figure in the 10% voltage rule. Voltage fluctuation is figured at the 10% rule for operation being ac or dc. 12 volts is 12 volts. His sounds like an amp problem. You can have 12 or 13 volts all day yet if you don't have the amperage to back it up your dead in the water.
yup...mine has read anywhere from 12.3-12.7 for years and still cranks like a champion