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johnbutty

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  1. Tony, Nicknorman: Many thanks info interesting and informative. (note my inverter is 12/1600/70, Gennie is a 2.2KVA). I am struggling for room to get 4 * T105 plus a starter, (have a metal welded tray with large lips welded to the transom?, flat bit above the swim.) Are the 12v monoblocks of a lesser quality that anyone is aware of as I can get to my nominal 300amps with 3 of these even at a higher price. Once again TVM John
  2. Tony: Thanks. Pretty sure the Smart Guage system is calibated OK, the Link 10 and my own Multimeter all show similar volts about +- .05v. I have used some 135 Liesure from Mid**** Swindl***. These were at 42Kg, Wt being historically my criterion as a choice for batteries. However a mate "in the know", tells me it is the thickness of the plates that counts. That is fewer thicker plates rather than many thin plates (starter) that give the higher available discharge and number of cycles. My 135s he reckons are only good for 300 odd cycles and on a floor of 50% discharge. Deep Discharge, good ones 1500 cycles and down to 30% discharge. If I could fit (Space) I would go for 2nd hand traction 2v which apparently go down to 10% and his are now 12 years old! Problem with looking at the wt. is I don't know what it is made up from, lots of thin plates (Starter), fewer thicker plates (Leisure) or a very few thick plates of the Traction/Semi Traction type. I cannot get any difiniative answer to where the battery lies on the starter to traction continuum, they does not seem to be an industry std. Just a lot of Marketing. Any advice, the Powerline, a branded Trojan look attractive, but what is inside!!!!!!
  3. Tony. The Smartguage/Smart bank uses a learning algorithm based on battery type. It seems to be about right. I also have an Amp Counter (only ruf) and tend myselve to watch the voltage and wait for the charge to drop to about 2% of installed capacity. The Solar MPPT also have an algorithm 4 stage which peaks at 14.6 and floats at 13.2. Rusty: Self calibrating, it learns. Checked with battery voltage and charge current as above.
  4. Having difficulty in recognising true Deep Discharge Batteries. My instinct is some Leisure batteries masquerade as DDB's. My last set of Leisure have not really lasted the year and are already down to 70% of quoted capacity. I have been pointed at Trojan, but have noticed US Battery, Crown, Powerline all claim to be true DDb's. Question: are these true DDB's, is there much between them. I continuously cruise, have 450watt of solar and on a bad (24hr) day may use 100amps. Max load washing m/c (hot fill, no heater). I am looking for about 300amphr at C20. I use a small 75 amp engine alternator or 2kVA gennie + Victron both via Smartbank/Guage VSR's.
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