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--- electrical:12v:diysmartpass [2023/07/28 17:09]
frater_secessus [challenges]
+++ electrical:12v:diysmartpass [2025/01/26 19:03] (current)
frater_secessus [the problem the Ctek solution addresses]
@@ Line 3: / Line 3: @@
 ====== DIY Ctek D250 + Smartpass setup ======
-This article is about the Ctek combo and possible approaches to duplicating the major functionality for less money and/or better specs.
+This article is about the 1st-gen Ctek combo and possible approaches to duplicating the major functionality for less money and/or better specs.
 This article assumes you want and the bank will accept >20A of alternator charging, and that your alternator can handle it.    If you only have a 80Ah AGM then the combo setup is massive overkill.  The bare D250 would handle that with ease.
@@ Line 20: / Line 20: @@
 [[electrical:12v:b2b|DC-DC chargers]] can boost alternator voltage to the required Absorption voltage but doing so with Big Current can be impossible or at least very expensive.  So DC-DC chargers are usually relatively small.
-Digression: this means that for **short drives** the isolator will likely return more Ah to the battery ban k than DC-DC.  On **longer drives** the DC-DC will both return more current and charge at a more appropriate voltage for the battery chemistry.
+Digression: this means that for **short drives** the isolator will likely return more Ah to the battery bank than DC-DC.  On **longer drives** the DC-DC will both return more current and charge at a more appropriate voltage for the battery chemistry.
 What if we paralleled an isolator with a small DC-DC to get the both of best worlds?  That is what the Ctek combo does.

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