Very interesting read. I know people focused mostly on the loft part, which is to be fair - the only "sane" part of this PAS - but I encourage everyone to actually read through it chapter by chapter. It is without a doubt as close as a country can get to a blanket ban on 99% of EESS installations in residential premises. Fat cats with 200sqm mansions excluded.

But as you read through this bizarre document, with eyes gradually getting wider and wider, and begin to make mental notes of every WTF moment and question or comment that pops into your head -  somewhere between "it is literally impossible to install in just about any terrace house in UK" and "just how are you going to run those DC cables from the battery system in the garden under the ground back to the inverter in most of the houses" - you'll also realise just how ridiculous is the idea to install EESS outside. On the sun in summer and in minus temperatures in winter. Most manufacturers won't even allow it.

And just like that... puff - the entire branch of PV industry gone. Yet... You'll still be able to park your Tesla in a garage or on your driveway one meter from the door or window without LD2 interlinked fire system. You'll still be able to leave your up to 54V powertool batteries on the charger without boarding them up in a 30 minute containment made of plasterboard or creating ventilation to the outside. You'll still be able to run UPS for your computers anywhere at home. And charge power banks from rainforest shop of any size overnight next to your bed. And heavens willing - your kids will still somehow survive through their childhood without randomly pulling Gg fuses from the DIN mounted cartridges protecting your DC cables next to PV SPDs in the enclosure somewhere in the loft. (Oh, and don't tell me you still install them next to the inverter under the stairs - read your BS7671 you barbarians - they are there to protect your cables as well and meant to be as close as possible to the source of the installation, not to "look pretty" next to isolators. "The source" in this case is on the roof). 

Yet somehow... only in UK... you won't be allowed to store energy made by your PV system in what only yesterday appeared to be the most tested, most developed, safest  and stable energy storage technology this world created to date. And why not? Because, to quote one otherwise usually very wise IET man - if we were to be reasonable about it and employ evidence based risk approach "we would have to wait until things start going wrong and people losing their lives". Well done everyone involved. 

Oh, and you forgot about a few locations. It looks like we can still fit them in kitchens, toilets or utility rooms. Just amend it to something like "not in a location areas that present a high fire risk to occupants, including any kitchen and the principal habitable room or locations at risk of water damage or flooding".

"just how are you going to run those DC cables from the battery system in the garden under the ground back to the inverter in most of the houses"

Don't you just design out that problem by using a.c. power interconnects? (e.g. charger and inverter alongside the battery, separate PV inverter)..

you'll also realise just how ridiculous is the idea to install EESS outside. On the sun in summer and in minus temperatures in winter. Most manufacturers won't even allow it.

But others do - e.g. Tesla Powerwalls are OK indoors or outdoors at temperatures between -20°C and +50°C - so the technical challenges are surmountable. So it comes down to a design decision to choose equipment that's suitable for the intended environment. If there's an increased demand for ones that'll work outside then market forces will usually oblige other manufacturers to catch up.

   - Andy.

Martin Korczak said:

Because, to quote one otherwise usually very wise IET man - if we were to be reasonable about it and employ evidence based risk approach "we would have to wait until things start going wrong and people losing their lives". Well done everyone involved. 

All I will say to that, is that it's quoted out of context. The question that answered was a little more specific, and the answer was appropriate there. But I understand people sometimes only see what they want to see.

Otherwise, people are entitled to their opinions. Opinions which could have been expressed at the appropriate point in time, that was publicised:  RE: Public Consultation: PAS 63100 Electrical installations – Protection against fire of battery energy storage systems for use in dwellings – Specification 

Martin Korczak said:

Because, to quote one otherwise usually very wise IET man - if we were to be reasonable about it and employ evidence based risk approach "we would have to wait until things start going wrong and people losing their lives". Well done everyone involved. 

All I will say to that, is that it's quoted out of context. The question that answered was a little more specific, and the answer was appropriate there. But I understand people sometimes only see what they want to see.

Otherwise, people are entitled to their opinions. Opinions which could have been expressed at the appropriate point in time, that was publicised:  RE: Public Consultation: PAS 63100 Electrical installations – Protection against fire of battery energy storage systems for use in dwellings – Specification