I was sent a press release the other day about a 120 AH battery that can be used down to 5% (wow) and charges from 5% to full in just 2 hours. (Big Wow) The catch,...it costs almost £2500.00 For that, I'd want a 25 year guarantee!
It then goes on to say, "Other features included in this system include alternator temp sensing, battery temp sensing". Why is there is a need to monitor the Alternator temperature? The reason is there is a risk of it being burnt out by the strain of the B2B. To run an Alternator to the very brink that it can overheat and be damaged IS pushing things to the MAX.
GEL: The Gel Cell is similar to the AGM style because the electrolyte is suspended, but different because technically the AGM battery is still considered to be a wet cell. The electrolyte in a Gel Cell has a silica additive that causes it to set up or stiffen. The recharge voltage on this type of cell is lower than the other styles of lead acid battery. This is probably the most sensitive cell in terms of adverse reactions to over-voltage charging. Gel Batteries are best used in VERY DEEP cycle application and may last a bit longer in hot weather applications. If the incorrect battery charger is used on a Gel Cell battery poor performance and premature failure is certain.
A point missed by almost everyone who is not in the know, is that gel batteries do require a completely different charging system to standard lead acid jobbies
A 'normal' battery is charged with a varying voltage and set amperage ( which does actually vary in the real world ) while a gel requires a completely stable voltage and varying amperage
Using a non gel type charger on a gel unit will work, but it will greatly reduce the life expectancy of the battery ( and I mean about about 80% less ) as a standard lead acid charger may have voltages going up as high as 16v ! ( gels tend to max at ABOUT 14.2v )
This is why most modern HM's have either a switchable system or, if gel fitted as OEM equipment might only have a gel type charging circuit
It is also why any decent solar panel regulator has different settings ( or indeed as mine, detects and auto switches between types
A very helpful and basically 'sound' page of info..
They would be better explaining why the Germans love mixing wet lead acid batteries and GEL batteries in parallel lol
LOL You'd think so wouldn't you? But know, inside your "blok" is a relay and the batteries are in parallelEddie, do you mean by fitting GEL as Leisure and wet lead acid for the engine.
I think our receive different charge voltages through the CBE, but I could be wrong...................Again.
Help in what way? BYW Love your username
How do you gauge them as down to 20% ? Voltage reading or battery monitor ? If voltage what are you happy to discharge them down to ?