We'd like to remind Forumites to please avoid political debate on the Forum... Read More »
We're aware that some users are experiencing technical issues which the team are working to resolve. See the Community Noticeboard for more info. Thank you for your patience.
📨 Have you signed up to the Forum's new Email Digest yet? Get a selection of trending threads sent straight to your inbox daily, weekly or monthly!
What is the 4kW limit for FIT?
Options
Comments
-
That's a little bit clearer though still liable to different interpretations.
e.g. I'm fairly happy that my 4 x 250w Suntech 'Black Pearl' panels should have a maxumum rating of 4.00kw but since Suntech make a big deal of their 'positive tolerance' it's just possible that some 'jobsworth' might decide that they really ought to be considered as being just over 4.00. Similarly, my SunnyBoy 4000TL is rated at 4.00kw but again is claimed to be able to deliver slightly in excess of that. I shan't lose a lot of sleep over the chances of being subjected to a full investigation !;)
GMT Morning / BST Afternoon Eric.
Hopefully by the time any jobsworth decides to spoil your sleep, you'll be able to point out that in addition to current system losses, you'll also anticipate a future drop in panel performance. If after 10 years the panels have lost 5%, then that's 200Watts off peak anyway.
I'd like to think that an element of common sense would be applied. Didn't say it would, just like to think that .......
Mart.Mart. Cardiff. 8.72 kWp PV systems (2.12 SSW 4.6 ESE & 2.0 WNW). 20kWh battery storage. Two A2A units for cleaner heating. Two BEV's for cleaner driving.
For general PV advice please see the PV FAQ thread on the Green & Ethical Board.0 -
Martyn1981 wrote: »GMT Morning / BST Afternoon Eric.
Hopefully by the time any jobsworth decides to spoil your sleep, you'll be able to point out that in addition to current system losses, you'll also anticipate a future drop in panel performance. If after 10 years the panels have lost 5%, then that's 200Watts off peak anyway.
I'd like to think that an element of common sense would be applied. Didn't say it would, just like to think that .......
Mart.
Suspect that 'common sense' will be a long time coming . . .
Incidentally, changing the clocks doesn't affect when noon actually occurs - that's still determined by when shadows are shortest and we've another half an hour of 'forenoon' left yet (even more in Wales).
Good MorningNE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq50 -
“Total Installed Capacity”
means the maximum capacity at which an Eligible
Installation could be operated for a sustained period
without causing damage to it (assuming the Eligible Lowcarbon
Energy Source was available to it without
interruption), a declaration of which is submitted as part
of the processes of ROO-FIT Accreditation and MCScertified
Registration;
So, DNC=TIC
DNC=TIC = max. AC inverter output
or total panels kWP (minus sys. losses) only if < inverter max. AC output.
"Eligible Lowcarbon Energy Source" in this case is the PV panels0 -
e.g. I'm fairly happy that my 4 x 250w Suntech 'Black Pearl' panels should have a maximum rating of 4.00kw
BTW I wanted Suntech 250s but my installer wasn't able to lay his hands on any.0 -
Kernel_Sanders wrote: »I'm struggling to understand some of the more technical points in this thread, so I'm not sure if that is a typo or not.
BTW I wanted Suntech 250s but my installer wasn't able to lay his hands on any.
Sorry, it should of course have read 4kw worth or 16 panels.
I'll amend it.NE Derbyshire.4kWp S Facing 17.5deg slope (dormer roof).24kWh of Pylontech batteries with Lux controller BEV : Hyundai Ioniq50
This discussion has been closed.
Confirm your email address to Create Threads and Reply

Categories
- All Categories
- 350.9K Banking & Borrowing
- 253.1K Reduce Debt & Boost Income
- 453.5K Spending & Discounts
- 243.9K Work, Benefits & Business
- 598.7K Mortgages, Homes & Bills
- 176.9K Life & Family
- 257.1K Travel & Transport
- 1.5M Hobbies & Leisure
- 16.1K Discuss & Feedback
- 37.6K Read-Only Boards