Sunny Tripower v 3 single inverters

DomB · Mar 15, 2011

Hi All,

Could I ask your thoughts / preferences on installing 1 Sunny TriPower inverter v 3 single-phase inverters (i.e. one on each phase)..? The system we're looking at is a pinch under 10kWp..

Thanks very much

BruceB · Mar 15, 2011

Tripower is cheaper, quicker, neater, and less to go wrong. But if it goes down everything is down.

Regards
Bruce

saint · Mar 15, 2011

I thought that if you install 3x single phase inverters you need to install some kind of relay. Therefore all three phases go down together either way. i'd be interested in a link/ cost estimate of one of these relays as i also am quoting on a similar size job.

DomB · Mar 16, 2011

Thanks BruceB

It looks like we're gonna go for an SMA tripower, as you say it looks relatively simple and there's a cost saving right there. I haven't confirmed but I suspect the tripower would balance its output across the phases nicely too.

I like the look of this OptiTrac Global Peak the tripower has out of the box. And interesting that there's going to be a software update made available for older inverters to get that too

BruceB · Mar 25, 2011

That has taught me something new about the Tripowers. I knew they were all G83/1 certified so could with DNO agreement be used on G83/1-1 Stage 2 situations. I had not realised they were separately G59 certified in their own right. That is useful.
Regards
Bruce

JulianC · Mar 25, 2011

Its also G59 certified so again makes an easier install as you shouldn't need separate G59 relay

Whilst I agree with this in theory, I am sure the DNOs would have their own take on this. Has anyone managed to get an answer out of any of them? I have so far drawn a blank with Central Networks.

edexlab · Mar 25, 2011

JulianC said:
Whilst I agree with this in theory, I am sure the DNOs would have their own take on this. Has anyone managed to get an answer out of any of them? I have so far drawn a blank with Central Networks.

I've got an application in with central networks for a job using 10000tl and 15000tl tripower and sent them both certificates should hear back within the next 10 days as it went in about 4 weeks ago ,I'll email the engineer to see if he's got an opinion
but I've not spoken to anyone about whether they'll need a separate relay