[RE-wrenches] Adding battery to grid tie

[Dave Angelini Offgrid Solar]

AC coupling is last resort.  I sure as heck do not want to deal with it! 
   I give them your phone number 😉

Dave Angelini Offgrid Solar
"we go where powerlines don't"
    [2]https://offgridsolar1.com/ [3]  [2]
e-mail  offgridsolar at sti.net
text 209 813 0060

On 2025-08-14 7:45 am, Zeke Yewdall via RE-wrenches wrote:

> While the AC coupled PV system can be added to the AC backed up loads 
> panel, this defeats a lot of the functionality of a dedicated AC 
> coupled PV array input on the AIOs and is not recommended by most of 
> them.   In theory, yes, it works on most inverters to just add it as a 
> negative AC load -- and I've even AC coupled an old Trace SW, and it 
> works fine on that, despite being designed and built before AC coupling 
> was thought of.
> 
> But, if it's just on the AC loads output, the inverter does not have 
> the ability to drop the AC PV array separately from the load if it 
> needs to for high battery charge regulating, does not have the ability 
> to measure the PV array input on monitoring, and may have other issues.
> 
> Zeke
> 
>> *Subject:* Re: [RE-wrenches] Adding battery to grid tie
>> 
>> Correct me if I'm wrong:  I believe AIOs can accept AC coupled power
>> through the load 'output' port. That leaves the Grid and Gen inputs 
>> free
>> for their roles as labelled.
>> 
>> The AC coupled inverters connect via a breaker in the critical loads
>> panel.
>> 
>> 
>> William Miller
>> Miller Solar.com
>> 805-438-5600
>> www.millersolar.com [1]
>> 
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Links:
------
[1] http://www.millersolar.com
[2] http://members.sti.net/offgridsolar/
[3] https://offgridsolar1.com/
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