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  • Battery placement best practices?

    Hi all,

    So I've a question about what the best practices should be when it comes to the batteries in a solar power system. I have sealed AGM batteries - is it ok just to have them sat on the concrete floor in the house? Should they be off the ground a certain amount? Should they be enclosed for safety? If enclosed can it be a wooden cabinet, plastic or metal? My main concern is safety - not only of people in the house but also the batteries themselves.

    Thanks!
    Last edited by DavidH; 07-27-2019, 10:12 PM.

  • #2
    "sealed" AGM batteries still need to be in a vented cabinet. At end of life, they often start venting hydrogen and you don't want explosive gas building up in a room
    Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
    || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
    || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

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    • #3
      The building inspector in Sonoma County California told me my Lithium batteries needed to be in a NEMA Type 1 case. I found one by Midnite Solar. It had vents because it was designed for Lead Acid batteries.
      9 kW solar, 42kWh LFP storage. EV owner since 2012

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      • #4
        Ampster, were those LiFePO4 batteries? I wonder if the criteria is different for lead acid batteries - meaning the NEMA Type 1 case requirement.
        Thanks Mike, I'll be sure to make sure they are well vented.
        Last edited by DavidH; 07-28-2019, 11:08 AM.

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        • #5
          Originally posted by DavidH View Post
          Ampster, were those LiFePO4 batteries? I wonder if the criteria is different for lead acid batteries - meaning the NEMA Type 1 case requirement.
          .....
          No they are Nissan Leaf batteries which are NMC. I dont think the inspector knows the difference. Your jurisdiction may be different anyway.
          9 kW solar, 42kWh LFP storage. EV owner since 2012

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