There are many changes to the Guide, which is now maintained by MCS, and far too many to list here in detail. However, this is a flavour of the scope and scale of the updates:
The new Fire & Rescue PV Notification sign
In general, these changes are welcome, and will help to further raise the standard of installations around the country.
There are also a number of references to the soon-to-be-enforced MCS standards for roof mounting products, which I will write about in another post.
What is the Guide to the Installation of PV Systems?
The Guide has been used in the UK PV industry for a decade, and is the primary set of rules and guidance on the design and installation of PV systems (way beyond the BS7671 Wiring Regulations, for example). The first two editions were published by the Department of Trade and Industry, and it is still often referred to - especially by old-timers - as the DTI Guide.
Ever since its first edition, the guide has provided essential guidance to designers. It covers everything from selecting modules and inverters, safety factors for selecting DC cables and switchgear, AC wiring requirements (earlier editions of BS7671 didn't cover SSEGs) and safe installation methods.
A copy of the latest version can be downloaded from the MCS website.