Extra solar install, how does export work ?

ispookie666

I read this as 
1. The old system has a 5 KW export
2. New system - generation capacity of 5KW and zero export(permission to install 5KW generation capacity) 

Reed_Richards

ispookie666 said:

I read this as 
1. The old system has a 5 KW export
2. New system - installed capacity of 5KW and zero export(permission to install 5KW generation capacity) 

I don't think that is what the OP thinks they have applied to their DNO for, but they don't seem willing to offer clarification.

nologo

hi back again, my understanding is the MCS installer applies to the DNO, prior to the installation (unless under 3.6ish kW) or am I mistaken, hope so it's going on Friday🙂

NedS

nologo said:

hi back again, my understanding is the MCS installer applies to the DNO, prior to the installation (unless under 3.6ish kW) or am I mistaken, hope so it's going on Friday🙂

Yes, you must have permission from the DNO to connect any generating equipment with capacity over 3.6kW before the work begins. It does not matter who applies for permission, you or the installer, but you must have that permission before work begins.

Qyburn

I'm pretty sure the G.99 application asks for details of any existing generation.

Solarchaser

Reed_Richards said:

I disagree.  You were accepted onto the Octopus tariff for your existing solar system and would have had to provide them with details of the MCS accreditation.  If you are adding more panels you ought to tell Octopus.

Also, "a new 5kW dno permit" surely just allows you to export 5 kW?  You need a 10 kW DNO permit to cover your total export.

I asked octopus about an export limit in terms of numbers of KW or KWH and their answer was there is no limit.

My plan is to charge batteries on the 7p rate and export during the day for 15p.

Green and ethically I'll be exporting between 7-9am and 3:30 and 7:30pm

I also plan to export all my solar

Reed_Richards

Solarchaser said:

.....
My plan is to charge batteries on the 7p rate and export during the day for 15p.

Green and ethically I'll be exporting between 7-9am and 3:30 and 7:30pm

I also plan to export all my solar

Charging the batteries and exporting would get you 8p per kWh per day (ignoring any "round trip" losses).  And you have 60 kWh of usable storage?  If so that would get you £4.80 per day or £1753.2 per year.  But the batteries and the inverter controlling them must have cost a fair bit so I wonder how many years at £1753.2 would cover that cost?    

nologo

hi update reply from Octopus via email, 
 "Once the installation is complete,make sure to obtain the following documents from you MCS installer,

Export MPAN, MCS Certificate, Letter from the DNO (also known as G99/G98)

0nce you have these documents please email them to us to review the information and advise the outcome and next steps"
  
This was sent from my account,so they are aware that I already export, I am sure they would have had a look at my details before replying?( or maybe not)

ps
Phone call from Installer today, roofer has fallen from ladder, may be a delay.....get well soon

nologo

All installed yesterday,as specified
no visible cabling,
 agreed layout,
5.95kW less than£6000. 

(new installation on the right)
all in I'm delighted and thanks to 
screwdriver for his assistance in this 
regards,nologo

Screwdriva

Looks very clean and matches the existing installation well!