Renewables: "talking 'bout my generation"

JKenH

Martyn1981 wrote: »

Hmmm! As I've said, I'm no electrician, but certainly read lots of comments/discussions about PV systems tripping out on 30mA due to the way they earth. So apologies for a possible wild goose chase, but you might want to raise this issue with the installers (some bloke on the internet said) and see what they say about the need for 100mA.

Either way, it would be really good for some feedback on here so we can all learn a bit more and hopefully advise better in the future.

Edit - I just Googled "PV 30mA or 100mA?" and got a MSE hit. The short thread has a post from myself linking to some discussions on the Navitron site with info from actual PV installers. Whether this is relevant, or even up to date, I don't know, but possibly worth a quick skim:

Solar panels Tripping RCD when it rains

Thanks again Mart. I did have a look at those sites following your earlier advice regarding the 30ma RCD.

Merlin139

Another good day. Best day of the month and best 2nd September since install.

Hawaii + 0.67 O's

Oscargrouch

JKenH wrote: »

They are coming out to fix it next week :T
In case Mart is reading this the system has a 30ma RCD with separate MCBs for the panels and the Moixa system.

I had a serious occasional tripping out problem a couple of years ago My Inverter was running off the 30mA trip switch, on the same side as the 30mA sockets. Trouble was when it tripped, it took with it Freezers etc. in fact all of the 13 amp sockets in the house. I cured the problem by getting it moved to the right-hand section of the consumer unit that accommodates, smoke alarm and lighting etc. My thoughts were; I didn't want to come back from a 2 week holiday to find 2 freezers and 2 fridges thawed out. Since the move it has never tripped to date; touch 'large chunk of wood'...:j:T..HTH..Today, 4.64 O's....

legoman62

Another day in the n,n,n,n nineteens. 4.8 O's today:D

KevinG

Not quite a maiden today, but at 5.91 Os I think that's my second best September day ever after yesterday.

Coastalwatch

JKenH wrote: »

Thanks again Mart. I did have a look at those sites following your earlier advice regarding the 30ma RCD.

I'm no expert either, but an electrician who'd put in a new consumer unit at his own home had horrendous problems with the RCD's tripping out. The issue being that it wasn't possible to isolate which circuit was causing the problem. Presumably being in series, they all added their own little isolation issue to the total!
As stated in a previous thread:-

An electrical engineer once said to me, if you can afford it, don't have RCDs, just have separate RCBOs for everything.

Which is what we had when having a new consumer unit fitted in our last property. Thus each circuit stands or fails on it's own merits. When our system was installed here it was put on it's own separate circuit and has yet to cause and issue, early days yet I know, but if one is put in series with other circuits who's to know which circuit, or combination thereof is to blame!


Returned home after being out all day to find the PV had generated 5.7 O's all on it's own!:D

On the other hand, our consumption totalled just 17% of it!

JKenH

3.9 O’s yesterday. Clear skies from 8am to 5pm then the clouds spoiled what might have been a perfect day. Having said that peak PV is now dropping off fast with a max of 3.6kw - less than half of the installed 7.8kwp. The east roof is suffering particularly badly..

Still we made good use of what we generated. These are the Moixa figures for consumption against a total generated 30.6 kWh.

Solar Provided
15.0 kWh
79%
Battery Provided
1.6 kWh
8%
Grid Provided
2.6 kWh
14%
Overall, Your home consumed
19.1 kWh

Most of the grid usage was overnight Economy7. Some of the battery capacity was carried over as not consumed. I find the Moixa stats overstate the consumption as it is done from clamps and when there is more solar PV being produced it drags up the consumption figure on the live display. They are looking into that.

This is what it looked like on the display.

https://www.dropbox.com/s/qgaygfg08lytl33/IMG_0543.PNG?dl=0

and more detail from the data.

https://www.dropbox.com/s/85617kjdws1qffe/My%20Moixa.pdf?dl=0

KevinG

I can't believe my disappointment at only getting 4.6 Os today!

legoman62

Panels nodded off early today. Managed 3.8 O's:D
Not looking good for tomorrow:eek:

ASavvyBuyer

Just 1.38 O's for today.