Monday, Jun 29, 2009 at 17:06
Iam / Mainey said
"If you have an alternator that can produce greater than 30A why strangle it and then use something supposedly to compensate for an initial poor wiring practice. "
Not sure where the 30 A alternator comes in, but here are some good reasons to buy the product.
( Who said anything about a 30A alternator)
1)Regardless of what cable you have, you get a voltage drop, across the cable, connectors, fuses etc.
(yes)
For example 2 AWG (33mm sq) cable running 30A will give you a drop of about 0.6 of a volt over 16 m ( 8 m there and back). That equates to a lot longer charging times or less than full batteries.
(Not in the acceptable industry standard that Im aware of)
2)The batteries in the trailer will almost certainly different to the cranking battery and may require a higher charging voltage.
(A cranking battery is normally a 14.8V so what are you going to use)
3)The Alternator will temperature compensate by lowering the voltage under the bonnet after a short engine warm up period knowing that the battery will be warm. In most climates, the van's battery will be 25 to 50 degrees colder than the compensated value, and will require a HIGHER CHARGE VOLTAGE THAN THE ALTERNATOR WILL DELIVER. No thickness of cable will fix that.
(Then under load there will be alot of dead batteries and potentialy cars.)
4)You can charge the batteries faster by increasing the voltage ( even in thick cable scenarios) when you don't travel long each day.
(100% correct)
5)You can charge the AGM's at a faster rate than the wet cranking battery, necessary when the van's batteries are probably more discarged anyway.
(Generalising with AGM that come in both low recombination and high recombinationwhere most used are hybred AGM low recombination you are absolutely wrong)
6)You can charge the van's batteries from the aux battery in the vehicle when you are not moving. Despite Ian's statement which only applies to some cases
(Can I state most cases where normal crankers are used)
All valid reasons for this product IMHO, even if you two either don't understand it or sell it. Ayy ahh.( Maybe by your thoughts I dont understand it but I dont want to sell it and you have not convinced me that anyone should buy it but I believe that your valid points only stengthen the reason to buy a unit that achieves the objectives and it is not that 30A unit.)
Come back again Boobook 2 your at least force teaching me how to use the site better and I thank you for that.
Ian
FollowupID:
639572