PAS 63100:2024 - Protection against fire of battery energy storage systems for use in dwellings

[Swwils]

I thought that was for stuff over 1500DC

[Countrypaul]

From: https://uk.rs-online.com/web/content/di ... ions-guide

"BS 7671 covers circuits supplied at nominal voltages up to and including 1000V AC or 1500V DC. It also applies to Extra Low Voltage (ELV) ranges and Low Voltage (LV) ranges, across a variety of frequencies."

[Swwils]

62485 I mean

[John_S]

Having tried to read the document, I am rather confused.

- batteries should be in a ventilated space and in a fire proof enclosure - aren't these contradictory?

- disconnect switch for the batteries to be in the closure - so you have to open it to disconnect the batteries when they are on fire?

- no regard for battery chemistry

My batteries (2*Pylontech 5000s) are in an under stair cupboard. The cupboard has a concrete floor and was fire proofed, via a plasterboard lining, at the instance of a strict building control inspector when I had a loft conversion done 17 years ago.

I am going to add a heat and smoke alarm wirelessly interconnected to my other smoke and heat alarms.

[AGT]

Ventilated space could mean just that but with fire dampers that would shut down and compartmentalise the space in the event of a fire alarm activation it’s what happens in many commercial builds.

Mine will go in a detached garage- sorts the fire risk issue
Cement board to OSB lining- fire risk issue/manufacturers instructions
Wireless smoke detector linked to one in house- regs issue
Lock on garage door- authorised persons
Fan with thermostat- temperature/environment,

[GarethC]

- no regard for battery chemistry

This would be frustrating. My understanding is that there have been almost no fires due to LFP batteries. Does this feel like inappropriate standards for LFP batteries? Surely dodgy e-bike batteries more of a fire risk?

[AGT]

The regulations cover all battery chemistries though

[Andy]

Having tried to read the document, I am rather confused.

- batteries should be in a ventilated space and in a fire proof enclosure - aren't these contradictory?

- disconnect switch for the batteries to be in the closure - so you have to open it to disconnect the batteries when they are on fire?

- no regard for battery chemistry

My batteries (2*Pylontech 5000s) are in an under stair cupboard. The cupboard has a concrete floor and was fire proofed, via a plasterboard lining, at the instance of a strict building control inspector when I had a loft conversion done 17 years ago.

I am going to add a heat and smoke alarm wirelessly interconnected to my other smoke and heat alarms.

My reading of it was the enclosure is the metal box. Ie your pylon tech is the enclosure and it also has a disconnect switch.

[knighty]

any ideas for people wanting more than 80kwh in an outbuilding?

something other than a line of individual sheds with batteries in

[Countrypaul]

any ideas for people wanting more than 80kwh in an outbuilding?

something other than a line of individual sheds with batteries in

The document says:

6.5.7 The total stored energy of all units in an individual dwelling house shall not exceed:
a) 80 kWh where batteries are installed in one of the following locations:
1) detached garage or outbuilding;
2) outdoors (ground-mounted or wall-mounted); or
3) attached garage or outbuilding that has a fire separation with a performance of at least
REI 60 to BS EN 13501 series (60 min to BS 476 series for loadbearing capacity, integrity and
insulation); or
b) 40 kWh in all other cases.

So what happens if they are installed in 2 of the locations, seems to be a poorly worded document without much thought to edge cases. The use of dweling seems to only apply to the main house and not outhouses (see 3.1.6), so 6.5.7 is either using another definition of dwelling or maybe means somethig different.

Presumably if you use 2 seperate outbuildings you are allowed 80kWh in each one, or is it 40kWh in 3?