Re: [RE-wrenches] "DC current Injection": Whazzat?

[Starlight Solar Power Systems]

Help Mick,

With the Magnum AC coupled to the SE inverter, I suggest it’s an issue with 
Magnum power quality (reactance) with the blender controls/motor and the 
resulting AC waveform that is feeding the SE inverter. I have seen this before 
with Magnum Energy. Can you look at the waveform or PQ while starting the 
blender?

A simple solution (but perhaps a hard sell) is the customer acknowledges that 
this rare event will happen and ignore it for the 5 minutes it takes to restart 
the inverter. Battery power should be sufficient. Compare that to the cost of 
“fixing” this issue.

Larry Crutcher
Starlight Solar Power Systems






On Aug 17, 2017, at 6:51 AM, Mick Abraham  wrote:

Hi, Wrenchies~ 

My client has an AC coupled battery based setup. The batteries are good ol' 
lead floodies in pretty good health, the battery based inverter is Magnum 
MS4448PAE, & the string inverter is SolarEdge. There's also a Magnum ACLD "AC 
Load Diversion" control to regulate battery state of charge when there's no 
grid power. 

When there's no grid power & the system is on it's own, the SE inverter 
sometimes throws an error code 36 "DC current injection". This happens when the 
mongo blender is operated (Vitamix brand, older model) & again in a >no public 
power grid< situation. The error causes the synchronizing string inverter to 
de-couple from the Magnum then the standard five minute time-out ensues before 
a re-couple.

I think DC current injection is when the transformer-less SE inverter pumps a 
blip of DC into the grid--or micro-grid when there's no grid power--and I guess 
DC injection is IEEE verboten because it compromises power quality/power 
purity. Can the experts confirm if this is correct understanding, explain how 
DC can show up on the AC, and offer suggestions other than a replacement 
blender?

Thanks as always. The Wrench List is the Bomb!

Mick Abraham, Proprietor
www.abrahamsolar.com 

Landline: 970-731-4675
Cell phone or for text messaging: 970-946-6584
ᐧ
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Re: [RE-wrenches] "DC current Injection": Whazzat?

[b...@midnitesolar.com]

Maybe the blender in question uses some kind of half wave rectification 
to control speed or something like that ?


boB


On 8/17/2017 8:43 AM, RE Ellison wrote:
If getting rid of the blender which is the easier choice or at least 
trying a different blender to see if that does it is out of the question


How about the possibility of changing the solar edge to the magnum 
version of the panel inverter that they use to see if there are more 
compatible?


Possibly disconnect all and try just 1 new panel mount
to test ?

Just a thought,
Bob ellison

On Aug 17, 2017, at 9:51 AM, Mick Abraham > wrote:



Hi, Wrenchies~

My client has an AC coupled battery based setup. The batteries are 
good ol' lead floodies in pretty good health, the battery based 
inverter is Magnum MS4448PAE, & the string inverter is SolarEdge. 
There's also a Magnum ACLD "AC Load Diversion" control to regulate 
battery state of charge when there's no grid power.


When there's no grid power & the system is on it's own, the SE 
inverter sometimes throws an error code 36 "DC current injection". 
This happens when the mongo blender is operated (Vitamix brand, older 
model) & again in a >no public power grid< situation. The error 
causes the synchronizing string inverter to de-couple from the Magnum 
then the standard five minute time-out ensues before a re-couple.


I think DC current injection is when the transformer-less SE inverter 
pumps a blip of DC into the grid--or micro-grid when there's no grid 
power--and I guess DC injection is IEEE verboten because it 
compromises power quality/power purity. Can the experts confirm if 
this is correct understanding, explain how DC can show up on the AC, 
and offer suggestions other than a replacement blender?


Thanks as always. The Wrench List is the Bomb!

Mick Abraham, Proprietor
www.abrahamsolar.com 

Landline: 970-731-4675
Cell phone or for text messaging: 970-946-6584
ᐧ
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Re: [RE-wrenches] "DC current Injection": Whazzat?

[RE Ellison]

If getting rid of the blender which is the easier choice or at least trying a 
different blender to see if that does it is out of the question

How about the possibility of changing the solar edge to the magnum version of 
the panel inverter that they use to see if there are more compatible?

Possibly disconnect all and try just 1 new panel mount 
to test ?

Just a thought,
Bob ellison

> On Aug 17, 2017, at 9:51 AM, Mick Abraham  wrote:
> 
> Hi, Wrenchies~ 
> 
> My client has an AC coupled battery based setup. The batteries are good ol' 
> lead floodies in pretty good health, the battery based inverter is Magnum 
> MS4448PAE, & the string inverter is SolarEdge. There's also a Magnum ACLD "AC 
> Load Diversion" control to regulate battery state of charge when there's no 
> grid power. 
> 
> When there's no grid power & the system is on it's own, the SE inverter 
> sometimes throws an error code 36 "DC current injection". This happens when 
> the mongo blender is operated (Vitamix brand, older model) & again in a >no 
> public power grid< situation. The error causes the synchronizing string 
> inverter to de-couple from the Magnum then the standard five minute time-out 
> ensues before a re-couple.
> 
> I think DC current injection is when the transformer-less SE inverter pumps a 
> blip of DC into the grid--or micro-grid when there's no grid power--and I 
> guess DC injection is IEEE verboten because it compromises power 
> quality/power purity. Can the experts confirm if this is correct 
> understanding, explain how DC can show up on the AC, and offer suggestions 
> other than a replacement blender?
> 
> Thanks as always. The Wrench List is the Bomb!
> 
> Mick Abraham, Proprietor
> www.abrahamsolar.com
> 
> Landline: 970-731-4675
> Cell phone or for text messaging: 970-946-6584
> ᐧ
> ___
> List sponsored by Redwood Alliance
> 
> List Address: RE-wrenches@lists.re-wrenches.org
> 
> Change listserver email address & settings:
> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
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> 
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> www.re-wrenches.org/etiquette.htm
> 
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> www.members.re-wrenches.org
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[RE-wrenches] "DC current Injection": Whazzat?

[Mick Abraham]

Hi, Wrenchies~

My client has an AC coupled battery based setup. The batteries are good ol'
lead floodies in pretty good health, the battery based inverter is Magnum
MS4448PAE, & the string inverter is SolarEdge. There's also a Magnum ACLD
"AC Load Diversion" control to regulate battery state of charge when
there's no grid power.

When there's no grid power & the system is on it's own, the SE inverter
sometimes throws an error code 36 "DC current injection". This happens when
the mongo blender is operated (Vitamix brand, older model) & again in a >no
public power grid< situation. The error causes the synchronizing string
inverter to de-couple from the Magnum then the standard five minute
time-out ensues before a re-couple.

I think DC current injection is when the transformer-less SE inverter pumps
a blip of DC into the grid--or micro-grid when there's no grid power--and I
guess DC injection is IEEE verboten because it compromises power
quality/power purity. Can the experts confirm if this is correct
understanding, explain how DC can show up on the AC, and offer suggestions
other than a replacement blender?

Thanks as always. The Wrench List is the Bomb!

Mick Abraham, Proprietor
www.abrahamsolar.com

Landline: 970-731-4675
Cell phone or for text messaging: 970-946-6584
ᐧ
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