[RE-wrenches] Exploding RSD Unit

Christopher Warfel cwarfel at entech-engineering.com
Wed Sep 1 08:01:15 EDT 2021


Is this the same concept as Tigo?  (and others)

On 8/31/2021 5:15 PM, Jerry Shafer wrote:
> With outback fire raptor has been successful, it has a power supply 
> and if you shut the inverter or use the button either will shut off 
> the RSD. This is all it is no optimizer, no data, no bypass for shade 
> just RSD.
> Jerry
>
> On Fri, Aug 27, 2021, 8:48 AM James Jarvis <jj at aprsworld.com 
> <mailto:jj at aprsworld.com>> wrote:
>
>     So who has a good reliable off grid RSD? It all looks like failure
>     prone garbage to me.
>
>     Thank you,
>
>     -James Jefferson Jarvis
>     APRS World, LLC
>     +1-507-454-2727
>
>     (Sent from my phone. My apologies for spelling errors and brevity.)
>
>     On Fri, Aug 27, 2021, 05:02 Tump <tump at swnl.net
>     <mailto:tump at swnl.net>> wrote:
>
>         I would once again say that; we as an industry can influence
>         not only the writing of the code but with what we are /buying/
>         OR /not buying./
>         If the devices we are required to install to make things “more
>         safe & reliable”, at the cost of our livelihoods &
>         reputations, we all need to make the folks that are building
>         the RSD crap and those who require installation of
>         questionably safe & reliable crap aware of these problems.
>         WE can thru either going to the code development  meetings AND
>         NOT buying or installing this stuff. Not too easy when a huge
>         amount of solar is rooftop installs. As many of the installers
>         in the NE know its not a single level ranch were installing
>         this stuff on, short season & man lift required.
>         Tell your supplier why you are not buying that brand, let
>          your supplier & folks on the list what manufacture has good
>         reliable products AND tech support that we can understand, who
>         we can get in a timely fashion, and get the satisfaction of a
>         prompt replacement.  IF we don’t sell it they won’t have a job
>         or a market.
>>         On Aug 26, 2021, at 2:09 PM, Jeremy Coxon
>>         <jcoxon at sunwindpowerinc.com
>>         <mailto:jcoxon at sunwindpowerinc.com>> wrote:
>>
>>         Carl,
>>
>>         Did you get any kind of joy out of APSmart on that failure?
>>
>>         I will say that their tech support guy did at least try to be
>>         helpful, but the language barrier was really really steep and
>>         their distribution channels are less than ideal.  Their
>>         response to a request for compensation was that they would
>>         not be profitable if they had to pay for truck rolls for such
>>         a low cost item.  I really don’t think they GET IT.  We’ve
>>         been in business for over 16yrs and this one failure could
>>         easily have ended that run.
>>
>>         I cannot imagine we’re alone here.  I was told by AP that
>>         their failure rate was 0.2%. Now, I come from a reliability
>>         engineering background in petro chemical/ big pharma where a
>>         0.2% failure rate would be catastrophic.  Can you imagine
>>         that 2 out of every 1000 pills made could cause death?  We
>>         engineered secondary systems and multiple quality checks to
>>         contain catastrophic consequences for components that had
>>         know failure rates higher than acceptable values.  A simple
>>         solution to this fire initiation issue would be a metal
>>         enclosure instead of plastic casing.  That still doesn’t
>>         really solve the problem of extra connections though.
>>
>>         Best Regards,
>>         Jeremy Coxon NABCEP # 091308-21
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>
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>
>
>
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-- 
             Christopher Warfel
                      ENTECH Engineering, Inc.
PO Box 871, Block Island, RI 02807
                                 401-466-8978
<http://entech-engineering.com>


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