Forum Discussion
MrWizard
Dec 24, 2020Moderator
Traveler .. Where did you get the idea of 3x the AHR capacity,
I did not see that mentioned
A 1000 cold cranking amp start battery, would be tested at 500 amp load, the biggest load my batteries see in use is the MW, with a few lights and the TV, Around 96 amps,
For testing I turn the load knob all the way up, what I want to see is the voltage stay in range then recover when load is removed, since you have to turn the knob , it is Not instant 500amp load, and you can adjust to to a preferred amp load if you want, the tester can handle 500 amps for 15 seconds, that doesn't mean my batteries or yours will supply 500amps into a carbon pile resistive load, that's a load , not a dead short like welding, or a surge like cranking over the engine, starter wiring has very little resistance so it's a high current spike operation , I think the highest amps I have observed while using the tester on the house batteries is 300+, which is over 3x my usual max draw
As stated this is a stress test ,
Watch the voltage and the amps, and the recovery or lack of recovery
Imo whatever it's worth,
for a start battery it has to maintain enough voltage to keep the starter cranking , I don't know what that is
And for house batteries
Not drop below minimum voltage for inverter use
Inverter runtime testing has been done by many members ,
Seems like BLF does a lot of this, and reports on it frequently, the rest of us don't have to do it, we just read his posts,
This tester gives us a way test batteries before install, and a way to test monitor degradation as they age, and trouble shoot problems when they arise
I did not see that mentioned
A 1000 cold cranking amp start battery, would be tested at 500 amp load, the biggest load my batteries see in use is the MW, with a few lights and the TV, Around 96 amps,
For testing I turn the load knob all the way up, what I want to see is the voltage stay in range then recover when load is removed, since you have to turn the knob , it is Not instant 500amp load, and you can adjust to to a preferred amp load if you want, the tester can handle 500 amps for 15 seconds, that doesn't mean my batteries or yours will supply 500amps into a carbon pile resistive load, that's a load , not a dead short like welding, or a surge like cranking over the engine, starter wiring has very little resistance so it's a high current spike operation , I think the highest amps I have observed while using the tester on the house batteries is 300+, which is over 3x my usual max draw
As stated this is a stress test ,
Watch the voltage and the amps, and the recovery or lack of recovery
Imo whatever it's worth,
for a start battery it has to maintain enough voltage to keep the starter cranking , I don't know what that is
And for house batteries
Not drop below minimum voltage for inverter use
Inverter runtime testing has been done by many members ,
Seems like BLF does a lot of this, and reports on it frequently, the rest of us don't have to do it, we just read his posts,
This tester gives us a way test batteries before install, and a way to test monitor degradation as they age, and trouble shoot problems when they arise
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