From a non solar guy, does this look OK

Top Cat · May 29, 2012

God, i'm glad i don't do solar!

Any ideas on what i should put on my EICR?

Earthstore · May 29, 2012

Top Cat said:
So in the scenario i have posted and the scenario you have posted what would happen?

In your drawing, the customers incoming meter will read the same as it has always done, well, he will still be using the same 3KW to make your tea, but the 1kw of pV will run through his incoming meter along with the 2kw from the grid, so no gain.

If pv is installed after the incoming meter, then the meter will only clock up 2kw,
so as I said, your cup of tea is 1/3 cheaper.

How many sugars?

StuSpiers · May 29, 2012

Incorrectly connected and commissioned Pv system c3

Inform customer cus he will be spitting feathers.

Eco Deal · May 29, 2012

correct look that way to me so hes getting charged for producing his own juice so hes losing out the new consumer for the pv needs joining in between the supplier meter and the main D.B

Top Cat · May 29, 2012

Earthstore said:
In your drawing, the customers incoming meter will read the same as it has always done, well, he will still be using the same 3KW to make your tea, but the 1kw of pV will run through his incoming meter along with the 2kw from the grid, so no gain.

If pv is installed after the incoming meter, then the meter will only clock up 2kw,
so as I said, your cup of tea is 1/3 cheaper.

How many sugars?

I must be getting tired now because it looks like its 1/3 cheaper both ways! Going to bed now and see if brain works in the morning! Thanks for explaining it though.:smile5:

MickF · May 29, 2012

So it should be:?

If TT and TL inverter then bond array to earthing terninal, also if TL inverter may need a 100mA RCD as opposed to 30mA

moggy1968 · May 29, 2012

well, you risk opening a whole new can of worms there!!!
bonding, not necessarilly, RCD not necessarilly.
tails to existing CU 25mm if 100 amp fuse. If using a sub board you can use 16mm from the henley block to the sub board but fuse to block and main CU must be 25mm.

MickF · May 29, 2012

He's on a TT why no RCD?

And if TL Inverter why no bonding?

moggy1968 · May 29, 2012

sorry, didn't see the TT bit, must be getting tired! yes he will need an RCD. He might get away with a 30ma, worst case scenario is nuisance tripping of the pV circuit (must be on it's own dediacted RCD, not shared with anything else). It's open to debate wether that needs to be a type B RCD rather than the more usual Type A.
You don't necessarilly need to bond a TL inverter, it depends on the specific model. SMA TLs don't. It's been discussed previously at length on here so I don't want to hijack the thread about it, as I say, it's a whole new can of worms. I've now had 2 different asessors tell me that.

sedgy34 · May 29, 2012

MickF said:
He's on a TT why no RCD?

And if TL Inverter why no bonding?

TC is doing an EICR on the place hence his question and pic

moggy1968 · May 29, 2012

yes, but RCD protection and bonding are part of the EICR

sedgy34 · May 30, 2012

Top Cat said:
Just to add to my problems, what do i put on my EICR?

Put in comments box on exhisting installation
microgeneration photovoltaic system installed incorrectly at the mains and client who owns the roof space not benefiting from free electricity being generated from the system.

sedgy34 · May 30, 2012

HEY TC
is it a renta roof jobby??

Top Cat · May 30, 2012

Had the camera today, thought you would be interested! We have no warning labels at mains position or in loft space. As you can see we have the spaghetti in the roof space! What do you recon?