[RE-wrenches] Tigo TS4-A-F

[Christopher Warfel]

I would have thought so.  I can just see them saying tweak this, no 
tweak that.  But I going to have to assume their statement is valid.  I 
hope to fire it up in the next week.  My first EG4 so I need to learn 
how to commission this first.

On 11/18/2025 10:55 AM, William Miller wrote:
> Christopher:
>
> Thank you.
>
> How is it that one can put optimized inverters in front of a standard 
> MPPT algorithm?  Don’t they work against each other?
>
>
> William Miller
> Miller Solar.com
> 805-438-5600
> www.millersolar.com <http://www.millersolar.com>
>
>
> On Tue, Nov 18, 2025 at 5:47 AM Christopher Warfel via RE-wrenches 
> <re-wrenches at lists.re-wrenches.org> wrote:
>
>     I recently got the TS4 A-Os when I thought I ordered the TS A Fs
>     and was also worried about the possible fighting between the two
>     MPPT devices.  As was under the gun for weather and end of year,
>     went with the AO's. Have you tried emailing
>     "support at tigoenergy.com" <mailto:support at tigoenergy.com>?
>
>     I went through AI and found this document:
>
>
>
>     On 11/17/2025 11:44 PM, MDElectricSolar via RE-wrenches wrote:
>>     We are having no issues sourcing these from our primary vendor,
>>     Greentech.
>>
>>     Michael D Nelson
>>     MD Electric & Solar, Inc.
>>     707-684-0064 mobile
>>     707-884-1862 office
>>     www.mdelectricsolar.com <http://www.mdelectricsolar.com>
>>     www.facebook.com/mdelectricandsolar
>>     <http://www.facebook.com/mdelectricandsolar>
>>
>>
>>>     On Nov 17, 2025, at 7:11 PM, William Miller via RE-wrenches
>>>     <re-wrenches at lists.re-wrenches.org>
>>>     <mailto:re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>>     
>>>
>>>     Friends:
>>>
>>>     I am having trouble locating these RSDs.  Very few vendors
>>>     appear to have these and I can’t get any to call back and verify
>>>     they have them.  I can’t get Tigo to return my calls. Does
>>>     anyone know if these are discontinued?
>>>
>>>     What are the rest of you doing for rapid shutdown?  I don’t
>>>     trust Alps:  I have heard too many horror stories.  It seems the
>>>     form factor is too small to contain arc suppression measures.
>>>
>>>     Somewhere I saw as an alternative the Tigo TS4-A-O. These are
>>>     optimizers.  I worry these will fight with the MPPT algorithm in
>>>     the inverter or charge controller.  There is also the TS4-A-S
>>>     which has shutdown and monitoring.
>>>
>>>     All input is welcome an appreciated.  Thanks in advance.
>>>
>>>     William
>>>
>>>     Miller Solar
>>>
>>>     17395 Oak Road, Atascadero, CA 93422
>>>
>>>     805-438-5600
>>>
>>>     www.millersolar.com <http://www.millersolar.com/>
>>>
>>>     CA Lic. 773985
>>>
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>     -- 
>     Christopher Warfel, PE
>     ENTECH Engineering, Inc.
>     PO Box 871, Block Island, RI 02807
>     (401) 447-5773
>
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-- 
Christopher Warfel, PE
ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
(401) 447-5773
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