Posted by: @batpred

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Posted by: @transparent

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Posted by: @majordennisbloodnok

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If you don’t do it that way, you don’t get an installation certificate and that may cause significant problems when it comes time for you to sell the house.

... or when you attempt make a claim on insurance !

"KISS" applies. As the principle of "when in Rome, do it like the Romans do it". 😀

I had an EV charger put in by a qualified electrician. Did he register it with DNO? Of course not, apart from time spent, this could have attracted oversight: he applied the KISS principle for himself. 

Did I register the EV charger when I got onto the ukpowernetworks portal and saw it missing? Of course I did, as I applied KISS for a homeowner. I want oversight, I want any future sale to not be delayed by such things. 

Principles need to be used in context. 

Note: I have nothing to gain for myself my sharing these insights. 

The KISS principle is about not over-complicating. Following legislated requirements is not over-complicating.

I’m glad to read you have, in fact, used a qualified electrician. However your latest reply suggests you still haven’t read the Part P document you asked to be given a link to. I suggest you do so before continuing to argue.

Posted by: @majordennisbloodnok

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Posted by: @batpred

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"KISS" applies. As the principle of "when in Rome, do it like the Romans do it". 😀

..

Note: I have nothing to gain for myself my sharing these insights. 

The KISS principle is about not over-complicating. Following legislated requirements is not over-complicating.

I’m glad to read you have, in fact, used a qualified electrician. However your latest reply suggests you still haven’t read the Part P document you asked to be given a link to. I suggest you do so before continuing to argue.

If you would be minimally qualified to make these broad statements about electrics, you would have provided the image, the actual quote...

As my still unchallenged point was "When stating anything is part of building regulations, a source and image would help. "

By the way, I read the part P before our last couple of projects, for the basic stuff. 

And few with MCS could attempt to challenge. WIIFM applies here. 

Posted by: @batpred

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If you would be minimally qualified to make these broad statements about electrics, you would have provided the image, the actual quote...

As my still unchallenged point was "When stating anything is part of building regulations, a source and image would help. "

Nothing broad about what I’ve posted. My original post simply pointed out that any domestic electrical work (apart from a very few minor exceptions) must be signed off by a qualified electrician. You asked for evidence so I gave a link to the Government web site giving the actual document. So much for an unchallenged point.

If you disagree with the regulatory need for a qualified electrician, you are wrong. If you agree with the point, you could’ve agreed with my original post and avoided all the subsequent waste of time and effort.

@majordennisbloodnok 

You are causing a lot of confusion. Do not overthink this

I’m frankly amazed you think anything I have posted on this thread has been confusing. However, that’s irrelevant.

My primary goal - and responsibility - here is to ensure the information provided on this forum isn’t misleading to either members or visitors. I clarified a point that involving someone qualified is not a “nice-to-have” but in fact mandatory, and that fulfilled that goal. Everything you have posted since has served to hide that point, so I have had little alternative but to keep correcting you and/or clarifying.

@transparent @old_scientist

Quick update, I submitted the G99 to the DNO. Curious to find out how long it may take to bust the "need an MCS installer" myth on a home battery setup. 

Posted by: @old_scientist

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Is your installer MCS certified? If so, they should register the install and provide the paperwork for you.

So I can now confirm that no MCS qualified person ever touched this! I used electricians and if anything, the installation was overspec´ed. I had it all inspected after labelling, etc, no changes were recommended.

It seems it is not just 5kW. Instead it should be 8kW approved for export. I await the MPAN and will be sending it to Octopus shortly. 

The G99 was accepted by the DNO, the rest is history! Over 2/3 of the £3200 estimate that MCS chap gave me (to run two cables and sign some paperwork) is ready for the next project! PV leveraging the Solis hybrid inverter? 

From what @transparent mentioned, it is not common to have 8kW export approved with a single phase service.

Posted by: @batpred

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It seems it is not just 5kW. Instead it should be 8kW approved for export.

That can cause significant losses due to phase imbalance at the local substation.

It depends on a number of factors, such as

1. cable length between you and the substation
2. the cross-sectional area of that cable and the material from which the conductors are made
3. the size of the Neutral wire in comparison with the three phases
4. number of other properties between you and the substation, which are on the same phase
5. the available generation capacity on your substation transformer, which is typically half of the supply capacity
6. the number of other properties on that substation which have existing G99 and LCT approvals

The area Network Planner for UKPN will enter these details into a formula, which then provides a range of export potential that can be approved.

In short, what you wish to do conflicts with the supply capacity for your neighbours.
The DNO must evaluate those risks and ensure that the current in the Neutral remains below that of all three phases.

Posted by: @batpred

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I await the MPAN and will be sending it to Octopus shortly

Why?
From whom are you expecting to receive notice of your Meter Point Administration Number?

It's printed on each electricity bill you've been issued with.
MPANs are administrated by ECOES, who maintain the master database for all electricity meter statistics in GB.

When switching Energy Suppliers, the receiving party must liaise with ECOES.
A number of checks are made to ensure, for example, that the account is live and not in debt.
These checks ensure that fraud is eliminated and that the correct party receives bills for electricity consumption.

Posted by: @transparent

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Posted by: @batpred

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It seems it is not just 5kW. Instead it should be 8kW approved for export.

That can cause significant losses due to phase imbalance at the local substation.

...

In short, what you wish to do conflicts with the supply capacity for your neighbours.
The DNO must evaluate those risks and ensure that the current in the Neutral remains below that of all three phases.

Luckily, the DNO is the competent organisation and they already approved it. Perhaps it is since there are few PV installations in my neighbourhood. 

If they eventually decide to change my supply to triple phase, it may be less than 10 meters to be dug up...  

Posted by: @transparent

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Posted by: @batpred

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I await the MPAN and will be sending it to Octopus shortly

Why?
From whom are you expecting to receive notice of your Meter Point Administration Number?

I was referring to the export MPAN, like in the title of this thread. The DNO already issued this second MPAN.

I will now assemble a SEG evidence pack confirming all details for this non-MCS submission for export.   

Posted by: @transparent

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That can cause significant losses due to phase imbalance at the local substation.

...

In short, what you wish to do conflicts with the supply capacity for your neighbours.
The DNO must evaluate those risks and ensure that the current in the Neutral remains below that of all three phases.

 

Luckily, the DNO is the competent organisation and they already approved it. Perhaps it is since there are few PV installations in my neighbourhood.

I don't think you've appreciated the nature of phase imbalance.

Let's consider solely the effect on the grid of just one house having solar export.
That must create imbalance because there will be decreased demand on the substation transformer for houses connected to that phase when grid export occurs.

A second house connected to the same local substation which installs a solar inverter with export has a one-third probability of being on the same phase as the first!
In the following timeline from a transformer supplying domestic properties, the solar export is only from houses on phase L1.
The period of sunshine starts at 10:00 on 17th June (a summer day)

The reason that the above substation losses can be withstood is because it is operating well inside its maximum capacity.
That is also the case for the 3-phase underground cable supplying the houses. I can see the cable size on the map in front of me.
Thermal stresses from the high current carried by the Neutral are probably still within the cable specification.

The random nature of solar export being assigned to phases means that losses due to phase imbalance are likely to increase until 10% of houses are exporting:

Stating that there are few PV installations in your neighbourhood conveys the opposite message to that which you might've intended.

Nothing here supports the case for UKPN having a high level of competency.

Posted by: @transparent

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Posted by: @transparent

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Luckily, the DNO is the competent organisation and they already approved it. Perhaps it is since there are few PV installations in my neighbourhood.

I don't think you've appreciated the nature of phase imbalance.

..

Nothing here supports the case for UKPN having a high level of competency.

I did appreciate, but I am not responsible, it is not my call (and give the system I have I will probably be exporting at peak usage times). Now UKPN is the responsible organisation for the regional distribution. I intend to work with them throughout the lifecycle of these components anyway. 

And right now, I have enough to be concerned about with the items I am responsible for.

I think UK PN have a few million (tens of millions?) of customers to manage and they seem to have planned for it.

I have no choice of DNO, but I enjoyed a very efficient process so far, one that minimises delays to householders.  

Solis AI is on the right track to leverage the battery:

It uses the grid when the prices are lower. Grid usage is negligeable otherwise..