Differences

This shows you the differences between two versions of the page.

--- electrical:12v:b2b [2018/12/28 14:32]
frater_secessus [CTEK D250 series]
+++ electrical:12v:b2b [2019/06/02 16:51]
frater_secessus [Battery to battery chargers]
@@ Line 4: / Line 4: @@
 [[https://amzn.to/2RY2GNQ|{{ https://images-na.ssl-images-amazon.com/images/I/3131jBgz9LL._AC_US218_.jpg}}]]
-This kind of controller boosts the chassis voltage to voltage appropriate for proper Absorption.
+This kind of controller boosts the chassis voltage to voltage appropriate for proper lead-acid Absorption.
+===== limitations =====
+Lead-acid batteries require two things to get fully charged:
+  - a high enough [[electrical:12v:charging#absorption_stage|Absorption voltage]] (Vabs)
+  - enough //time// at that voltage for the battery to stop accepting much current.(([[electrical:12v:battery_capacity|C/100]] to C/200))
+DC-DC chargers address the first requirement, but unless you are driving for //hours// the isolator won't have enough time to fully charge the batteries.  DC-DC charging is very effective on cruisers (boats) that run the engines for hours each day.
 ===== CTEK D250 series =====

RV and vandwellers wiki