2 systems?.

[Badger666]

Hi. This might sound a dumb question. But is it poss to have 2 4kw systems. What I would like is too have 1 system mcs installed and claim my fit. But then have another system installed by myself. Coupled to the same cu but not register the system. Just have it purely to supply my equipment.
Ive got a feeling it can't be done. If it can great. Or is their a way around this problem. Today I was running between 4.5 kw-5kw for nearly 4 hours. So even I staggered the loads. I would run out of natural light anyway on just 1 system alone. Yes I could try and balance the load over a few days. But the weekends are mad too say the least. Any help would be great. I'm hoping in the next few weeks my own system will be installed and generating. Thanks Dave.

 

[poheZ]

you would have to notify the dno and see if they would accept such a connection

 

[SolarCity]

I don't see it being an issue but I've got a feeling if anyone will know then it will be TedM. As above, I think it is an issue for the DNO alone. They may not allow 8kWp of microgeneration connected to the grid.

 

[SRE]

Are you getting the 45p is that why you don't want to register the 2nd system? Just wondering why you wouldn't register, then remembered the higher rate - it seems so long ago now!

 

[snoopdog]

Are you getting the 45p is that why you don't want to register the 2nd system? Just wondering why you wouldn't register, then remembered the higher rate - it seems so long ago now!

I agree prior permission would definitely be required be required by the DNO.

I really do not understand why you would not register the additional 4 KW on the MCS (as long as the DNO gives prior permission ).
By not registering the additional 4Kw you would be missing out on its FIT payment of 16.8p a lot of money.

 

[snoopdog]

I agree prior permission would definitely be required be required by the DNO.

I really do not understand why you would not register the additional 4 KW on the MCS (as long as the DNO gives prior permission ).
By not registering the additional 4Kw you would be missing out on its FIT payment of 16.8p a lot of money.

The following thread has a lot of simalarities which was only a couple of weeks ago http://www.electriciansforums.net/p...-pv-system-extension-new-system-fit-rate.html

 

[TedM]

There's no reason why a DIY (non MCS) system can't sit alongside a full MCS FiTs system as long as the FiTs total generation meter is kept completely separate. The DNO would need to give prior approval to exceed the G83/1 limit. Planning permission might also come into it depending on the circumstances.

As others have said this option might be cheaper initially but not be the best in the long run. For a start you would be paying 20% VAT on all parts rather than 5% on an install.

 

[Earthstore]

No one has asked yet if it is a single or 3 phase supply, as this could change everything.
Ted, that is a good point you make on the VAT.
My advice would be to have two separate systems, installed at separate times, both claiming FIT's, if done correctly you would benefit in the long term.

 

[Avontech]

@TedM if it is 'installed' by an electrician and supplied through them, it would surely only attract 5% (from the electrician) as it is renewables, - surely it doesn't need to be an MCS certified system to be supplied at 5% does it?

Obvously over 3.68kVA he will need DNO approval, as to wether it would be cheaper to dot it himself (along with an electrician friend - who would need to sign it off anyway) or have it qualify for MCS is a financial decision.

Also some DNO's will happily take up to 17kW per phase under G83/1 Stage 2 application, and only require G83/1 certified equipment, they don't ALL insist on G59 - best thing to do is to try to call your DNO, they are all very helpful when you call and speak to them.

I am aware of a number of installtiosn where there are multiple generators, - Solar, Wind, and Micro CHP all connected and produceing >10kWp on a single phase domestic supply. Each generator only needed to comply with G83/1

As I understand it, if you read very carefully the regulations, a DNO can permit this at their discretion under Section 6.2 of G59 - they may require specific modificatiosn to the upper frequency limits, so not all inverters may be capable of connection - the SMA inverters are good in this respect as under the correct controls they can be tailored to meet them.

 

[TedM]

If installed by a VAT registered company then 5% VAT would apply. But there can't be many reasons for not using an MCS installer at present.

I expect all DNOs to start applying G83 limits more strictly in the near future.

 

[sedgy34]

the dno will allow him to have a 4kw on the fit and an additional say 4kw in the future for his own general use if theres roof space that is.

 

[SolarCity]

the dno will allow him to have a 4kw on the fit and an additional say 4kw in the future for his own general use if theres roof space that is.

The FIT is nothing to do with the DNO. The DNO is simply interested in what is connected.

 

[sedgy34]

The FIT is nothing to do with the DNO. The DNO is simply interested in what is connected.

As my post!!! Didn't say that, was stating they will allow the 2 systems on the 1 m pan number.

 

[SolarCity]

I misunderstood your post when you said "4kW on the fit".

The DNO will only allow 16A before asking for an application to be made.

 

[sedgy34]

Agreed you have to ask for consent