[RE-wrenches] Tigo TS4-A-F

[Christopher Warfel]

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"?

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
> www.facebook.com/mdelectricandsolar
>
>
>> On Nov 17, 2025, at 7:11 PM, William Miller via RE-wrenches 
>> <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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