Tuesday, May 11, 2010 at 15:42
If you can tell me where I can read up on the SC80 I will do so.
I asked if it was a dc dc converter - you did not answer.
I have asked how passing 80A exceeds the capability of passing 140A or 30A etc - you have no explained.
I have found nothing to suggest it is anything other than an isolator with dual outputs - but I have been concentrating on your incorrect statements.
But please - stick to Amps as does the SC80 literature I have seen. AH has nothing to do with how much something can pass - it has to do with battery and other powersource capacities.
I repeat again, for a mere $25, I can pass 250Amps. How many AH is that? Is it less than your 120AH?
As to ease of fitment - I'm not arguing that.
Some say it is far to difficult finding the D+ or L wire from the alternator - they prefer to spend the money.
Others consider it easy else worthwhile and prefer using common everyday relays that are cheaper and reliable than other isolator that have no additional benefits.
If users cannot find that wire or do the install, it can be done by others & professionals. Most will then be able to replace or add relays etc.
The choice is up to the user and their ability.
Maybe bbuzz is capable of tapping into his D+ or L circuit and considers that trivial compared to the extra cabling, fusing, housing etc. And maybe he has a relay that will do the job else doesn't mind spending $5-$10.
Let the OP decide, else request further information.
But it is a simple 3 wire circuit (+GND) - ie, the standard In & Out (heavy current) & earth/ground/chassis connections.
Then "merely" the connection to the alternator or voltage regulator's D+ or L "Charge Lamp" circuit - this being the only extra required compared to voltage sensing systems (normally a short length of thin wire from the nearby alt/reg else dash to the relay with an optional fuse). (Or no fuse if a MOSFET is used either instead of replace the relay or for modern alternators that cannot drive (say) 250mA @ 12V.)
I request that you not continue in circles - let readers decide what they want, or start another thread to invite continuance of this discussion.
Or supply a link to the relevant information....
Else describe WHY the SC80 is not like other isolators.
EG: How does the SC80 charge batteries and pass higher AH capacity than a near-zero resistance relay contact that connects the alternator to the batteries? Are you saying that is uses conversion?
(It isn't another one that claims "prioritised charging" and "monitoring of batteries". LOL - talk about hype - though the SC80 may be different, but not at that price!)
AFAIAC, I have merely suggested an isolator that meets all requirements and is as simple and reliable as it gets.
It overcomes parallel battery issues and provides the quickest charging for connected batteries. (And even a reverse polarity won't destroy its control LOL!)
It is easy to expand for additional batteries, manually defeat or isolate selected banks, manually activate and include a low voltage cutout. And all that with common off-the-shelf items (generally).
And whilst battery condition monitoring (BCM) and alarms can be provided as
well as dc-dc converters to boost charge and even help restore batteries, I keep that separate from the isolator function. All of that can be added - it is compatible - but it is NOT part of the basic issue of installing multiple batteries in a vehicle/system and be able to charge them avoiding idle-parallel issues.
If anyone has questions or requires clarification, please ask.
But I find it pointless repeating the same over & over. (Did I include a diagram or provide a link? Ooops?)
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