On Sat, 6 Jun 2009 21:52:02 +0100, "Guy Morgan" <[email protected]> wrote:
>Hi all > >The time has come to replace the domestic batteries on nb Virgo. The >present batteries are 4 x Trojan T-50 6 volt wired in series parallel. I >believe the T-50 is/was a 100AH unit though I can't find it listed on the >Trojan website. > >My battery box is only just large enough to accomodate these 4 batteries, >nothing larger though I could manage an extra inch of height. I'd like to >increase the available capacity if I can. So far I've found a couple of >Trojan types, T105 and T125, in the same size cases as the old T50. The >best price I've found is at Battery Megastore, Tewkesbury T105, £130 and >T125, £138. They've also got an American type I don't recognise in a >si,milar capacity and the same size at £115 each. > >Does anyone know a better price and also are there any pitfalls I've missed >in doubling the battery bank capacity (other than cost!)? IMHO you have two options. 1 use two T105's giving 225Ah roughly the same as the 4 T50's 2 Blow the inheritance and get 4 T105's giving 450Ah You need say 10 - 20% charge rate so with 4 batteries 45 - 90A assuming no load onboard whilst charging. What does your alternator put out? I have fitted other T105 look alikes in the past when supplied by customers but they have not performed like Trojans so I would suggest spending that bit extra. I suggest charging at 14.8v or thereabouts for speed and de-sulphation, even higher with look alikes possibly. Bristol Batteries may do you a deal also the guys in Stroud, Glos, name escapes me. Keep them topped up, and not low volts for a long time and they will do you proud IMHO. -- Richard
