DNOs and G83 limit

[wozzit99]

Just a thought,

G83 over freq setting maybe in the range of G59 setting but it is also a full 1Hz below the reccomended limit. So nuisance tripping on larger systems might cause problems with the dno, thats why G59 settings are more forgiving. It does'nt explain why only the frequency limit has to be altered and not the rest of the parameters.

 

[BruceB]

I think you may be right there. Here is a G59 extract:



and also explains perhaps why sma went to the trouble of certifying their tripower range to the g59 standard in Feb this year

Regards
Bruce

 

[wozzit99]

Thanks Bruce

Is it only the tripower range of inverters which are accredited with g59?

 

[BruceB]

Do not know for sure, but just having checked their website for the 3000TL/4000TL/5000TL they only have G83/1 certification on the english page

 

[SolarCity]

Tripower inverters are accredited with G59? Are you sure?

 

[BruceB]

Yes
http://download.sma.de/smaprosa/dateien/1807/G592_STP8-17TL-10-ZEN110610.pdf

 

[claypole]

I was in contact with SMA to query aspects of the 4000TL, and specifically to see if it could be restricted to 16A output. I have copied below a reply I received asking if G59/2 certification would be useful? As a consumer, and having now completed my install, it's clearly of no concern to me but you might like to voice your opinion to the contact details below if you feel that certification would be helpful.

Dear Mr. S....,

currently we are discussing, if it is more usefull to have the G59/2 certificate for all inverters with a AC-current > 16 A. As I understand the regulations it is possible to use Generating Units > 16 A per phase and ≤ 50 KW 3 phase which must be G59/2 compliant. A type verified protection equipment is accepted.
So, would it be more helpful that you have the G59/2 certificate for that inverter ?


mit freundlichen Grüßen
Yours sincerely
SMA Solar Technology AG
i. A. Bernd Krah

Technical Support Medium Power Solutions
Sonnenallee 1
34266 Niestetal
Germany
Tel.: +49 561 9522-3314
Mobil: +49 151 54345943
Fax +49 561 9522-4080
E-mail: [email protected]

 

[Matt_M]

I had a chat with a chap from CE Electric, at the Yorkshire and Humber Microgeneration Project conference yesterday, and he confirmed they use the inverter output for the rating.

I also got it in writing.

 

[daytona600]

bit of confusion lately from board to board
some allow 16amp plus , some stick are rigid at 16amps output
two options
decrease dc Kwp of the system to approx 3.68kwp one less panel or 5/10wp decrease per panel
fit new 2011 sma sunny boys with limited 16amps output , bit of a waste of clients dc kwp output on sunny days
16amps on three phase generally not a problem eg with sma 10kwp STP10,000TL inverters

never had a answer from a dno yet about the answer if you fit a 4kwp dual-axis tracker
increase output by 30-45% compared to fixed systems
with high yield solarworld/sanyo with high effciency sma TL inverter

 

[Worcester]

fit new 2011 sma sunny boys with limited 16amps output

Looking at the current spec sheets where can I find that?

I have a west facing roof which we are looking at using the SMA SB3800 on, and I am looking for the maximum rating so that we can do it without needing to do a pre-install application. (3.68 kw) Only other inverter I can find maximum continuous rated at 16A / 3.68kW is the Diehl Ako 4300S