12v from 24v series batteries

[BartW]

can you post a link/source for your battery tester Vas please?

I have this Tecmate sinds many years, and very happy with it
TA20 | TecMate TA20 Battery Tester For Various Battery | RS Components

every winter I test all batts from each bank (2 x 12 x 12V/110Ah) and take out the faulty batt's
In the past I've also used (double tested) with a anaolg tester with a big shunt, but the digital was consistently more accurate

 

[Rocksteadee]

I have this Tecmate sinds many years, and very happy with it
TA20 | TecMate TA20 Battery Tester For Various Battery | RS Components

every winter I test all batts from each bank (2 x 12 x 12V/110Ah) and take out the faulty batt's
In the past I've also used (double tested) with a anaolg tester with a big shunt, but the digital was consistently more accurate

Not a cheap bit of kit, could buy 2 new batteries for that

 

[vas]

Not a cheap bit of kit, could buy 2 new batteries for that

was about to say the same, however Bart says he's had it for many years, probably that was the price at the time, now the market seems to be full of similar devices starting at 30euro or so...

 

[BartW]

Not a cheap bit of kit, could buy 2 new batteries for that

the boat has 12 domestic, 12 engine , 2 genny and 2 tender batt's, total 28 pcs,
so it does make sense for me,
(especially it allows me to sort out the batts, take out the bad, and use the good ones one or more extra seasons ..)

on my domestic bank (6 pairs of 12V) I've installed 6 x Victron battery ballancers, isn't that overkill

 

[vas]

as promised, that's the one I've got, confused though as I paid 50euro and on ebay it starts way more than that...

NEW GYS Digital Battery Tester BT 222 DHC | eBay

DHC is the brand, BT222 the model
nice piece of kit, definitely recommend it (even if you only have 8batteries onboard - jetrib included...)

cheers

V.

 

[vas]

the boat has 12 domestic, 12 engine , 2 genny and 2 tender batt's, total 28 pcs,
so it does make sense for me,
(especially it allows me to sort out the batts, take out the bad, and use the good ones one or more extra seasons ..)

on my domestic bank (6 pairs of 12V) I've installed 6 x Victron battery ballancers, isn't that overkill

Bart, 12engine batteries??? FFS!!! OK, I see the domestic and running the stabs with the two 8KVA Victrons, but engines, how many CCAs do these MANs need???

V.

 

[BartW]

Bart, 12engine batteries??? FFS!!! OK, I see the domestic and running the stabs with the two 8KVA Victrons, but engines, how many CCAs do these MANs need???

V.

that is the orriginal setup, and never thought about changing it,
don't know the CCA, they are all the same type, 12V 105Ah deep cycle used to be Delphi, but now same batt also available from Varta and many others

the engine also start with 3 pairs instead of 6 pairs,
but now with the stabs it is very convenient to have the same capacity for each side / fin
a very nice and lucky coincidence

same as my original passerel, that is long enough so that it allowed for a retrofit hi lo platform, 1.5m long

 

[vas]

so Bart, you start your MAN engines with deep cycle batteries? nice!

 

[BartW]

:Vas,
perhaps its not really deep cycle, its a dual purpose batt, these are the ones I have:
820 054 080 | Varta Automotive

exactly the same batt is also available from other brands, ao Trojan (look at the specs and the housing...)
Trojan 31XHS accu - Accudienst.nl

but next time, I'll replace them all with gel battery (Victron 110Ah gel has exactly same dims)