#1 March 22, 2017 13:06:50

Clodbuster
Registered: 2012-05-16
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PV Plus

I've been approached to install a “PV Plus” into the system that is going to increase the generation by 30%.

Strongly think it is b@ll@cks but does anyone know of this?

Thanks



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#2 March 23, 2017 09:31:44

Clodbuster
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PV Plus

I listened to the salesman who tells me that all panel arrays have a protection so if one panel goes over the rating for that panel (in my case 240w) then the inverter shuts down THE WHOLE array for 15 minutes so I lose all generation for that period. This may happen 4 - 5 times per day. This “PV Plus” irons these spikes out preventing the inverter shutting down so you record greater generation. He said between a minimum of 25% to a possible 40% depending on season etc.

Cost is £4000, at my current generation and return about 7.5 years to recoup.

Anyone able to corroborate that the panels are shut down so frequently?



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#3 March 23, 2017 16:58:54

pnews99@hotmail.co.uk
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PV Plus

well mines never shut down in 7 years except for mains failure so yes think someones trying to con you

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#4 March 23, 2017 17:32:30

SteveRogers
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PV Plus

Clodbuster
Strongly think it is b@ll@cks but does anyone know of this?Thanks

I think your initial assessment is correct!

Steve

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#5 March 24, 2017 10:31:38

Clodbuster
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PV Plus

Thanks for your comments - I think I'll give it a miss.

This is the system in question.

https://www.renewableenergyhub.co.uk/blog/pv-plus-unit/



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#6 March 24, 2017 16:27:33

WendyNorthrop
Registered: 2012-04-23
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PV Plus

Hi,
For the record; my ‘Sunny Beam’ monitor shows that my system has automatically shutdown 3 times in 6 years all shutdowns were due to A.C. mains-grid failure.
Wendy
URN 749

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#7 March 27, 2017 09:09:57

Clodbuster
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PV Plus

I do appreciate the responses from the forum members but this is a Sheffield Uni website and forum.

I spend time taking weekly readings and sending them in for their use so I did think I would get some authoritative response from them on this query. If the information is correct then it would be to their benefit and if wrong then they would be protecting their forumees from a shyster ripping them off because someone WILL fall for the spiel. I also sent an email that was not replied to.



Rugby - the game where the objective is to pretty much kill the opponent with the ball and then have a beer with him afterwards.

Edited Clodbuster (March 27, 2017 09:11:13)

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#8 March 27, 2017 09:58:57

Clodbuster
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PV Plus

I had a reply from the manufacturer of my inverter and I copy their reply in.

“Thank you for contacting us, Inverters are designed to only convert the maximum DC input that the inverter is capable of, the over voltage issue the PV Plus refers to only occurs in a very small number of systems usually farms and areas that are remote where the supply voltages can be less stable. It does not read the generation of individual panels.

The voltage of the PV panels which is DC does not increase with the exposure to more sun, with a small amount of daylight the DC voltage of a PV module is almost at maximum so stays stable throughout the day, it’s the current which is directly affected by irradiance levels, so overvoltage of the PV system is not possible if the system is designed correctly and inverter will not turn off.”

So that solves the question.



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