Isolators, Combiners & ACRs

Aug 16, 2009
1,000
Hunter 1986 H31 California Yacht Marina, Chula Vista, CA
Thanks to many who have answered, I now understand that an isolator prevents a discharged bank from sucking voltage from a charged bank, but at a voltage cost. Not good. A combiner does the same thing, without the voltage loss. Comes now the ACR, which is billed as "dual sensing". It appears to be a technological advance over the combiner, but I'm not entirely sure how so. Following the very much appreciated help from the forum, I wired the alternator directly to the house bank and removed the isolator. So is there a cost/benefit to using an ACR in the system to distribute the charge from my Freedom 20 inverter/charger?
 
Feb 6, 1998
11,759
Canadian Sailcraft 36T Casco Bay, ME
Thanks to many who have answered, I now understand that an isolator prevents a discharged bank from sucking voltage from a charged bank, but at a voltage cost. Not good. A combiner does the same thing, without the voltage loss. Comes now the ACR, which is billed as "dual sensing". It appears to be a technological advance over the combiner, but I'm not entirely sure how so. Following the very much appreciated help from the forum, I wired the alternator directly to the house bank and removed the isolator. So is there a cost/benefit to using an ACR in the system to distribute the charge from my Freedom 20 inverter/charger?
An ACR is a combiner... They are both in the same class of device known as a voltage sensitive relay...

ACR = Combiner = VSR = Zero Voltage Drop Relay etc..

Isolator = Diode isolators = Voltage Drop

Battery to Battery Chargers = Echo Charger = Duo Charger = Sterling Battery to Battery Charger etc..
 
Feb 26, 2004
23,352
Catalina 34 224 Maple Bay, BC, Canada
wufi,

ACR Blue Sea = good trustworthy company

Combiner - Yandina, excellent trustworthy company, LIFETIME warranty, no questions asked

Electrically - functionally identical

Your boat, your wallet, your choice.