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From: Don Y <blockedofcourse@foo.invalid>
Newsgroups: sci.electronics.design
Subject: Re: energy in UK
Date: Thu, 17 Apr 2025 14:09:34 -0700
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On 4/17/2025 8:00 AM, Theo wrote:
>>> I don't think the *city* places limits on size of plant.  But, requires it
>>> to reside on rooftops to avoid permitting, architects, etc. (of course).
> 
> The difference is that < 3.68kW you can just install PV with no permitting.

You can grid tie these systems without even the notification of the utility?

Here, there is a streamlined "residential rooftop solar" process:

     Main Dwelling Rooftop, Permitted, Residential structures only
     No Ballasted Systems
     Not in a special district or in a historic preservation zone
     Not in an environmentally sensitive area or hillside development zone
     Not located in a County Flood Hazard or flood plain area (b*)
     Located within the city limits
     Licensed contractors only

This gives you "same day" approval.  I suspect all it actually
does is record your use of solar on THAT (residential) premises.
The technical compliance issues become the responsibility of
the "licensed contractor".

Failing to meet all of the criteria triggers a lengthier process
with more inspections, delays, etc.

> If you want to install more you need to fill in a form first.  The power
> company could tell you to limit your export based on the capacity of the
> local grid, but they can't refuse you point blank (you could just do 3.67kW
> in the worst case).

There are many commercial (and governmental) installations that are
sizable.  It is a favored technique to provide overhead SHADE for
otherwise exposed parking areas.  So, one will often see large
parking lots covered with free-standing panels -- something welcomed
by the patrons of <whatever> establishment!

<https://www.google.com/maps/@32.2305587,-110.8591616,109m/data=!3m1!1e3?entry=ttu&g_ep=EgoyMDI1MDQxNC4xIKXMDSoASAFQAw%3D%3D>