Thanks Joe, I was trying to keep it simple. I guess I should have asked if the 
house bank increased in voltage would it activate the ACR? My “ACR” is not made 
by Blue Sea, it’s made by Heart or Xantrex and I didn’t want to assume Blue 
Sea. Technically they are actually a contactor but they do call them a relay! 
(That’s why I prefer the Blue Sea ACR over the Xantrex Echo Charger, contactor 
vs relay.) Contactors are generally designed to carry higher amps than relays. 
100 years ago I selected relays and built contactors to suit different voltages 
loads and custom applications. The solution will be simple but we need all the 
pertinent details. There are just too many reasons the starting battery could 
be at 90%. 
Len 

Sent from my iPad

> On Nov 24, 2020, at 12:02 PM, Della Barba, Joe via CnC-List 
> <cnc-list@cnc-list.com> wrote:
> 
> The ACR is a relay, not a diode. It conducts current either way.
> What is variable is which battery it senses to make decisions. It could be 
> house, start, or both of them.  All it does is connect at X voltage and 
> disconnect at Y voltage. X is probably about 13.8 and Y is probably about 
> 13.4 or so.
>  
>  
> Joe Della Barba
> Coquina
> C&C 35 MK I
>  
>  
> From: Len Mitchell <xfireca...@gmail.com> 
> Sent: Tuesday, November 24, 2020 10:49 AM
> To: Stus-List <cnc-list@cnc-list.com>
> Subject: [EXTERNAL] Stus-List Re: Solar power in ACR environment
>  
> If the house bank is getting charged it could just be about amp hours in and 
> amp hours out too! What size is the solar panel? Is there any load on the 
> house bank like refrigeration etc? Is the solar panel mounted in 
> uninterrupted sun? Is the panel performing, how many amps at peak? Has it 
> been cloudy? Does the ACR connect in both directions? What’s the age and 
> condition of the starting battery? The sun obviously isn’t as strong this 
> time of year either! My 250 watt panel needs blue sky all day after September 
> just to keep up but I am north too. 
>  
> Len Mitchell
> S/V Crazy Legs
> 1989 C&C 37+
> Midland On. 
> October is the time to show your appreciation with a small contribution to 
> this list to help offset the costs. If you want to support the list - use 
> PayPal to send contribution --   https://www.paypal.me/stumurray  Thanks - Stu
October is the time to show your appreciation with a small contribution to this 
list to help offset the costs. If you want to support the list - use PayPal to 
send contribution --   https://www.paypal.me/stumurray  Thanks - Stu

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