[RE-wrenches] Exploding RSD Unit
drake.chamberlin at redwoodalliance.org
drake.chamberlin at redwoodalliance.org
Sun Aug 29 09:18:37 EDT 2021
Fronius is also involved in the effort to remove the MLSD requirement.
https://solarbuildermag.com/featured/safety-concerns-for-solar-pv-module-level-shutdown-solutions/
In order to remove MLSD, it would require financial backing to get
someone on a committee, pay, house and feed them throughout the process.
Maybe Fronius or other large inverter manufacturers could afford to do
this.
-Drake
Drake Chamberlin
Athens Electric LLC
Ohio Electrical Contractor's License 44810
CO Master Electrician's License 4526
NABCEP Certified PV Installation Professional
---
On 2021-08-28 12:20, Ray wrote:
> All of these new code required safety features have a detrimental effect on reliability. That's not a huge deal with GT, but off grid, this can become a serious safety issue in itself, as the homeowner loses communications, water, heat, and frozen food.
>
> There are opponents of solar energy that are laughing at us now, for being scared of our own shadow, when we as an industry have had an overall excellent safety record that goes back 40 years. We need to take a serious look at which safety issues are real, and which are not. Standardizing PV connections is very important. Module level RSD is not.
>
> Ray Walters
> Remote Solar
> 303 505-8760
>
> On 8/28/21 9:46 AM, Dave Angelini Offgrid Solar wrote:
>
> The Schneider RSD is decent. At least it is useable as a 600vdc disco. The few offgrid homes that were required to use this had the Tigo units on the array panels and wireless comm to the RSD. As soon as the inspector was done, those went to Ebay. I never use a roof but have used a barn for panels.
>
> AFCI, GFCI, and now RSD are just more things to fail when you need them the most, like during a wildfire or hurricane.
>
> I know you folks have to do what you need to do to stay in business. For me, electronics are in a covered building.
>
> Always!
>
> Dave Angelini Offgrid Solar
> "we go where powerlines don't"
> http://members.sti.net/offgridsolar/
> e-mail offgridsolar at sti.net
> text 209 813 0060
>
> On Fri, 27 Aug 2021 07:48:34 -0800, James Jarvis <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> 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> 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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