NEC 2020-Compliant Batteries

[Jojohoho]

After reading an earlier thread about NEC 2020 and DIY installs, I'm completely rethinking my storage plans. Definitely not going to be building my own LFP battery packs . And I have started to engage my local electrical inspector, who needs to read up on the new rules. But I'm wondering what others are doing for NEC 2020-compliant batteries/"energy storage systems". I really want to stick with LFP if I can, but I also don't want batteries to break the bank.

Looks like SimpliPhi got UL9540 certification this year: https://www.solarpowerworldonline.c...-lfp-batteries-receive-ul-9540-certification/. Seems like a lot of installers like their batteries, but gosh are they expensive.

 

[copec]

Find out if they are going full UL 9540 or just want listed for all the things, my city seemed to find this helpful: https://code-authorities.ul.com/wp-content/uploads/sites/46/2019/08/ESS-Final-Handout_8-8-2019.pdf

 

[Cyanlite]

SOK Server Rack batteries on CurrentConnected's website says they are undergoing UL9540 testing. ETA Sept 2022.

Eg4 server rack batteries have the full UL1973 cert (but not 9540).

 

[copec]

After reading an earlier thread about NEC 2020 and DIY installs, I'm completely rethinking my storage plans. Definitely not going to be building my own LFP battery packs . And I have started to engage my local electrical inspector, who needs to read up on the new rules. But I'm wondering what others are doing for NEC 2020-compliant batteries/"energy storage systems". I really want to stick with LFP if I can, but I also don't want batteries to break the bank.

Looks like SimpliPhi got UL9540 certification this year: https://www.solarpowerworldonline.c...-lfp-batteries-receive-ul-9540-certification/. Seems like a lot of installers like their batteries, but gosh are they expensive.

DIY batteries can absolutely be done safely fwiw, even if there isn’t a path for them to be legal at this point in time. I could see in another decade there being all specific listed parts tested together that make up a ESS system being legal.