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Starting and Charging System Service


Sun VAT 45 Analyzer

Accurate and quick testing of batteries, starters, alternators, regulators, and charging systems.

Battery Testing:

The way it has been:  Customer brings in a dead battery and you have to charge it up to test it. Then, if it’s a keeper, you have to recharge it. Hardly efficient use of your valuable time. With The Vat 45 on the job, we can test discharged batteries down to as low as two volts, and it won’t drain a charged battery you are testing. We  won’t waste your time charging bad batteries. Works on all 12-volt automotive-type batteries with cold cranking amp ratings of 100-1500. This includes batteries found in motor-vehicle, marine, agricultural, forestry, and industrial applications.


On certain competitive, carbon-pile load battery testers, the technician must interpret the readings, then make the electrical system diagnosis. With The VAT 45, all you have to do is read simple test results on the LCD display.

Starter Testing

Display shows cranking volts and amps, and indicates either “Good Starter" or “Bad Starter." Excessive starter current draw can indicate a defective starter. Excessive engine drag, due to tight or damaged bearings or piston drag, can also cause an abnormally high starter draw.

Charging System Testing

Checks the charging system at high rpms and at idle, and stores the data. Results show regulator volts, peak amps, and a diode condition. The VAT 45  utilizes waveform analysis when testing alternator diodes, which provides more accuracy than the commonly used “ripple voltage" tests.

Battery Tachometer Capability

Unique, patented direct-from-battery technology gives you tachometer readings without having to make complicated connections to the ignition system. Provides battery-sensing measurements to 4,000 rpm, with 1 rpm resolution.

Accurate Tests Results the first time

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