Deep Cycle battery testing

[Admin]

I have bit the bullet and ordered an Ah battery tester for lead-acid batteries. This is not a CCA (cold cranking amp) tester that is used in car shops. The unit is calibrated and has an accuracy of better than 10%. It can test batteries up to 200Ah C20 rating.

This was not cheap and even with a good discount has cost around £250.

I want to test the batteries that Wildebus is buying from me and I also have a couple on Banner batteries that I want to test before selling them.

The great news for members is that I will have this with me at rallies and I may be able to test batteries that they suspect are knackered.

The unit simulates a 20-hour discharge (C20) and gives the actual capacity of the battery (+-10%). It is calibrated and proven to accurate.

 

[nabsim]

Do batteries need recharging after the test Phil?

 

[Admin]

Do batteries need recharging after the test Phil?

No, but they do need to be charged before the test otherwise it will only show the remaining Ah.

The test only takes a few seconds (Voodoo Magic) and it displays the available Ah of the battery.

 

[St3v3]

The test only takes a few seconds (Voodoo Magic) .

I bet it's just got a sensor that reads the battery label, then takes off a random amount pmsl.

I've got a battery or two I might bring to Hereford Very cool kit.

 

[Molly 3]

Great news and a kind offer

 

[wildebus]

No, but they do need to be charged before the test otherwise it will only show the remaining Ah.

The test only takes a few seconds (Voodoo Magic) and it displays the available Ah of the battery.

Sounds pretty cool.
If the battery is not fully charged but you have a Monitor that tells you what the calculated SOC is (so say a BMV telling you 90% SOC for example for a 100Ah Battery), will this tester still give useful info e.g. if it reports 90Ah Capacity but you "know" (from the BMV) you have used 10%, that is still a pretty good indication of a 100Ah battery that still has full capacity when charged? Does that make sense?

Just thinking if you happen to have the tester with you at Camp Quirky, I can maybe check the batteries that I am taking OUT in order to fit the ones I am putting IN from you (as I am selling those on - first two reserved at the end of May - and would be great to be 100% sure on the state of them ).
But not sure what the SOC of those batteries will be at the weekend (depends on the weather and solar of course!)