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02-08-2016, 09:07 PM
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#1
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Member
Join Date: Jul 2015
Location: Ontario, Ontario
Trailer: 2015 17B Sold
Posts: 89
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DIP switch settings on the Samlex SCC-30AB solar charge controller
I used my cell phone to take a picture of the back of this controller in an effort to see how the DIP switches were set. It appears that ETI installs the controller using the "default settings". DIP #1 default is for a 12v system. DIP #2, 3, &4 default is set for "Sealed battery, 14.0 Absorption, 13.4 Float and 'none' for Equalize" DIP #5 default is "manual equalization".
The three middle DIP settings (2, 3, 4) allow for 3 "Flooded battery" settings that use absorption rates ranging from 14.4 to 14.8 and equalization rates from 15.1 to 15.3. It seems to me that I should adjust the DIP settings for one of the "Flooded battery" settings and perhaps the third with the higher voltage ratings. (I have the dual 6v interstate batteries). Am I off on my thinking here?
Fred Alexander
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02-08-2016, 09:18 PM
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#2
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Site Team
Join Date: Jun 2014
Location: Canyon Lake, Texas
Trailer: 2015 19 "Past Tents", 2021 F150 Lariat 2.7L EB
Posts: 10,222
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Quote:
Originally Posted by fbalexander
I used my cell phone to take a picture of the back of this controller in an effort to see how the DIP switches were set. It appears that ETI installs the controller using the "default settings". DIP #1 default is for a 12v system. DIP #2, 3, &4 default is set for "Sealed battery, 14.0 Absorption, 13.4 Float and 'none' for Equalize" DIP #5 default is "manual equalization".
The three middle DIP settings (2, 3, 4) allow for 3 "Flooded battery" settings that use absorption rates ranging from 14.4 to 14.8 and equalization rates from 15.1 to 15.3. It seems to me that I should adjust the DIP settings for one of the "Flooded battery" settings and perhaps the third with the higher voltage ratings. (I have the dual 6v interstate batteries). Am I off on my thinking here?
Fred Alexander
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I would probably leave it at the factory defaults. The absorption, float and equalization are automatically controlled with dip switch 1 on. All you're changing by engaging switch 2 thru 4 is the algorithm of these automatic cycles, and slightly modifying the voltage. From what I can see in this table, dip 1 on and the rest off is about right for the Interstate batteries - or at least close enough that it shouldn't matter.
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"You can't buy happiness, but you can buy an RV. And that is pretty close."
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02-08-2016, 09:39 PM
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#3
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Senior Member
Join Date: Feb 2010
Location: Phoenix Metro Area, Arizona
Trailer: 2014 Escape 19
Posts: 767
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I would go with battery type 7 for the dual 6V configuration.
See: http://www.escapeforum.org/forums/f1...ries-5405.html
(I think the absorption voltage in the first post is a typo - Jeff accidentally copied the bulk voltage.)
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02-08-2016, 09:49 PM
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#4
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Site Team
Join Date: Jun 2014
Location: Canyon Lake, Texas
Trailer: 2015 19 "Past Tents", 2021 F150 Lariat 2.7L EB
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Quote:
Originally Posted by jamman
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Maybe I'm reading it wrong. Interstate's recommendation for optimum absorption voltage is 14.46V, no? The factory default would put it at 14.6 - pretty close.
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"You can't buy happiness, but you can buy an RV. And that is pretty close."
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02-08-2016, 10:06 PM
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#5
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Senior Member
Join Date: Feb 2010
Location: Phoenix Metro Area, Arizona
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See post #2 in the referenced thread.
Bulk 7.23 volts in a dual 6 volt arrangement 14.46
Absorption 7.65 volts in a dual 6 volt arrangement 15.3
Float 6.7 volts in a dual 6 volt arrangement 13.4
Equalization 7.8 volts in a dual 6 volt arrangement 15.6
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02-08-2016, 10:19 PM
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#6
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Senior Member
Join Date: Jul 2015
Location: Fremont, California
Trailer: 2016 21/ '16 Tundra 4.6L Dbl. Cab
Posts: 1,562
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........What The?.............
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Steve and Debbie
2016 - 21'
“Get out the map and lay your finger anywhere down” -Indigo Girls
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02-09-2016, 01:36 PM
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#7
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Site Team
Join Date: Jun 2014
Location: Canyon Lake, Texas
Trailer: 2015 19 "Past Tents", 2021 F150 Lariat 2.7L EB
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Quote:
Originally Posted by jamman
See post #2 in the referenced thread.
Bulk 7.23 volts in a dual 6 volt arrangement 14.46
Absorption 7.65 volts in a dual 6 volt arrangement 15.3
Float 6.7 volts in a dual 6 volt arrangement 13.4
Equalization 7.8 volts in a dual 6 volt arrangement 15.6
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Ah, I get it. So, setting it for type 7 makes sense. Probably good to check the electrolyte levels more frequently though at the higher charging voltage.
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"You can't buy happiness, but you can buy an RV. And that is pretty close."
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02-09-2016, 01:41 PM
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#8
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Senior Member
Join Date: Feb 2010
Location: Phoenix Metro Area, Arizona
Trailer: 2014 Escape 19
Posts: 767
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Quote:
Originally Posted by rbryan4
... Probably good to check the electrolyte levels more frequently though at the higher charging voltage.
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Absolutely. I check about every 6 weeks.
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02-09-2016, 01:44 PM
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#9
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Senior Member
Join Date: Nov 2008
Location: Janesville, WI, Wisconsin
Trailer: Escape 19 (sold) Escape 21 2014
Posts: 1,884
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Fred,
I think you are on the right track to adjust your DIP switch settings to the higher charge rates for absorption and I agree with Doug and go with Battery Type 7. I realize you do not have a L-16 battery but the charge rates for the dual six volt batteries are what Doug indicates.
Bulk 14.5
Absorption 15.3
Equalization 15.6
The most important rate is the Absorption. Using Battery Type 7 will get you the closest to the Interstate recommended rates.
If you would like more information on these charge rates from Interstate, visit their web page for the recommended levels of a single 6 volt, then double the result for dual six volt. Quite high charge rates. The Trojan T-105, a comparable battery to the Interstate uses similar high charge rates.
As always, when charging at these rates be sure the battery box is properly vented and the batteries are filled to the proper level with distilled water.
__________________
Paul and Janet Braun
2003 Toyota 4Runner V8 now 2012 Toyota Sequoia V8
Escape 19' 2010 now 2014 Escape 21'
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02-09-2016, 02:54 PM
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#10
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Member
Join Date: Jul 2015
Location: Ontario, Ontario
Trailer: 2015 17B Sold
Posts: 89
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Thank You Paul and all! I will adjust to Type 7 and monitor the levels regularly. Speaking of that, would "proper levels" be just above the plates or is it to the bottom of the plastic of the filler holes?
And... would the rational of ETI leaving the "default" DIP settings be "it's safer that way"?
Fred
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02-09-2016, 04:49 PM
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#11
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Senior Member
Join Date: Nov 2008
Location: Janesville, WI, Wisconsin
Trailer: Escape 19 (sold) Escape 21 2014
Posts: 1,884
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Yes and yes.
Above the plates and at or below the fill tube.
I could only guess as to the rationale but your guess would be my first.
__________________
Paul and Janet Braun
2003 Toyota 4Runner V8 now 2012 Toyota Sequoia V8
Escape 19' 2010 now 2014 Escape 21'
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02-09-2016, 05:33 PM
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#12
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Member
Join Date: Jul 2015
Location: Ontario, Ontario
Trailer: 2015 17B Sold
Posts: 89
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Thanks again Paul!
Fred
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02-09-2016, 06:17 PM
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#13
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Senior Member
Join Date: Jun 2010
Location: Central, Pennsylvania
Trailer: Escape#5 2022 E19
Posts: 26,268
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using distilled water, only.
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Jim
Sometime life gets in the way of living.......
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02-09-2016, 07:41 PM
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#14
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Senior Member
Join Date: Dec 2012
Location: Edmonton, Alberta
Trailer: 1979 Boler B1700
Posts: 14,935
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Maintenance instructions from battery manufacturers typically say to top up with water only when the battery is fully charged, to avoid accidental over-filling since the electrolyte expands during charging. But do ensure that the plates are at least barely covered at the start of charging.
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