Smokes required on ESS?

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Zee

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CA
Just got training on GENERAC battery systems.

They mentioned interconnected smoke alarms required in dwelling if battery installed.

Can't find in 2017 NEC Article 706 - Energy Storage Systems.

Where would I find this requirement?
Is it true?
How about if battery is on exterior wall?
 
I believe this is California Fire Code and only applies to systems with more than 20kWh of storage capacity in the case of lithium batteries.
 
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I would check the adopted residential building code.
I know for commercial, the IBC 907.2.22 requires an automatic smoke detection system in areas containing stationary storage batteries and refers to the fire code for more direction.
 
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A Fire Chief on a recent install (Massachusetts) provided us with the attached reference. I think this is from the 2015 IFC.
 

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I also second the comment above regarding the strict requirements for systems over 20 kWhs. I suspect thats exactly why LG designed their packs to be 9.8 kWhs.
 
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Good info.

Looks like regardless of NEC or other building codes, it happens to be in both install manuals (for 2 different batteries I plan to install).
The installation requirements of mfctr in effect becomes part of the code.
Interestingly, if BATT in garage, at least one mfctr wants a heat alarm installed there that is interconnected to smokes in house.
Probably a good idea.
 
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