Boom there goes the batteries

[ians]

This is getting interesting:

I removed 6 of the 12 of the batteries and took them for a second opinion ...the battery shop used a DHC battery & electrical system analyzer ...5 of the 6 passed

vol: 12.63 v
CCA: 807EN
IR: 3.59mOhm
Good dand pass
SOH: 807EN
100%
SOC: 12.63V
100%

Then carried out a load test using a hawkins battery tester.
Turned the current to 105 amps 3 of the 4 batteries which passed all the other tests where in the lene between the red and green.
1 battery stayed well in the green.

Then I took the batteries and weighed all of them...

weight ranges from 21.5 kg to 22.5 kg between the batteries.

[ians]

It looks like we in for 12 new batteries as we cannot mix old and new.

The big question is which battery to use?

Do i stick with the lead acid (the cheapest and hope for another 5 years) R1870.00 gone up from R1700.00 since Saturday... the cheapest R26000.00 in vat

It seems the gel battery no longer features in the battery to use.

The AGM battery ...R2400.00 ...total R 33120.00 inc vat

Then new buzz word for batteries is lead carbon ...a little more R3300.00 total 45540.00 in vat

Around R19000.00 difference in price.

The talk is that you get a better DOD and longer life... has anyone got actual proof of this?

Would it not be better to invest in a better BMS to monitor the charge rate ...equalization etc ?

I am all ears ...i have people lined up desperate for a backup system... which i believe in and wont break the bank and some.

[ians]

My concern with AGM batteries they are totally sealed...just like your alarm battery... they only last around 2 years.

Can an AGM battery take a good beating ...high current draw for a period of time.