Battery choice and set up

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Peter

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Looking for some advice on battery selection and advice from any experts out there. Current set up 440amp/hr house battery’ bank, seperate up front battery 110a/hr for bowthruster and windlass, but connected to house bank, so seen as part of house bank, and engine start battery with VSR separating house and engine battery. All charging by solar, wind and shore based Stirling battery charger. All batteries are a standard lead acid leisure battery, have worked and lasted 6 years.
Looking to replace house bank with Trojan's, a new 110a/hr Leisure battery for the up front battery and keep connected to the Trojan's for charging and house bank capacity.
Question is will the set up work as my understanding is Trojan's cannot take any cranking current and if any cranking current gets past the up front battery the Trojan's will see that current and from what I've been told could fxxk up the Trojan's. Would mixing different batteries types cause any charging issues. Not looking to put isolator between Trojan's and up front battery as will forget to turnon/off at some point
Or just keep with what I've got but replace all with vatra's

Sorry if long post and hope it makes sense to someone.
 
Peter said:
Question is will the set up work as my understanding is Trojan's cannot take any cranking current and if any cranking current gets past the up front battery the Trojan's will see that current and from what I've been told could fxxk up the Trojan's.
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Sounds like unreliable info -

http://www.trojanbattery.com/pdf/datasheets/T105_Trojan_Data_Sheets.pdf
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The trojan tech dept are helpful if you want to check, email will be on their site.
 
Peter said:
Question is will the set up work as my understanding is Trojan's cannot take any cranking current and if any cranking current gets past the up front battery the Trojan's will see that current and from what I've been told could fxxk up the Trojan's.
Click to expand...

It would help if you could indicate precisely which "new Trojan".

It's quite wrong that Trojan's can't deliver cranking current. Even the deep cycle T105 is described by Trojan as perfectly happy and able to start an engine (and they certainly start mine without ill-effect). Perhaps other batteries in the Trojan range cannot, but I suggest you seek reliable information for the particular battery you have in mind. Should the information so gleaned emanate from a person who believes that "Trojans cannot take cranking current", then it is not reliable.
 
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Might be worth having a chat with trojan anyway, they spec 14.8v bulk charging for t105's, but I suspect this might be more to do with getting the batteries back to full charge as quick as poss when being used in industrial applications where they have a tough life, if your battery up front has a lower bulk charging voltage spec then the trojans might not notice as long as they are on a long enough charge.
 
I think that's correct, GHA, and seem to remember Plevier writing as much. (For relative newcomers, Plevier is probably as close as the forum has to a battery guru.)
They will need to be brought above gassing voltage, though.
 
Peter said:
Looking for some advice on battery selection and advice from any experts out there. Current set up 440amp/hr house battery’ bank, seperate up front battery 110a/hr for bowthruster and windlass, but connected to house bank, so seen as part of house bank, and engine start battery with VSR separating house and engine battery. All charging by solar, wind and shore based Stirling battery charger. All batteries are a standard lead acid leisure battery, have worked and lasted 6 years.
Looking to replace house bank with Trojan's, a new 110a/hr Leisure battery for the up front battery and keep connected to the Trojan's for charging and house bank capacity.
Question is will the set up work as my understanding is Trojan's cannot take any cranking current and if any cranking current gets past the up front battery the Trojan's will see that current and from what I've been told could fxxk up the Trojan's. Would mixing different batteries types cause any charging issues. Not looking to put isolator between Trojan's and up front battery as will forget to turnon/off at some point
Or just keep with what I've got but replace all with vatra's

Sorry if long post and hope it makes sense to someone.
Click to expand...

Have a look at the Trojan T-105 data sheet: http://www.trojanbattery.com/pdf/datasheets/T105_Trojan_Data_Sheets.pdf
 
Thanks for the replies, following on from the comment about contacting Trojan, for info there reply


Response:

In parallel connections, different amp-hour capacity batteries can be mixed but do not mix different battery chemistries or manufacturers. I recommend you use the SCS225 as your 12V battery to mix with T-105’s in parallel.
 
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