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chrisbailey13
Member
So, if my single is 6" to the outer side, and the double stack is 12.5" off the wall then the separator is about .5"
I have a double stack next to a single stack off a concrete wall.
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chrisbailey13
Member
have you considered using an AC condenser pad for the base of your design. It would get you dry wood off the concrete floor and could be cut to fit the area you need
Perfect! Thank you so much! So based on your info, a stack of 3 should be 12.5 + 6.5 = 19" from the wall, including the hanging bracket for the 1st PW.
I'll do some research into the AC pad idea, but I'm needing the 3 PWs lifted 12 inches, so I'd have to stack them, plus I'd want them cut to the footprint size. Thanks for the idea, and the dimensions of your stacked PWs! Very much appreciate it!
chrisbailey13
Member
My thought with the suggestion was that it could be the foundation of your platform. since it looks like from your drawing the platform is 30x18, the Condenser pad could be cut on one side to 14.75' to match the bottom of your platform. The other side would not need to be cut since it is 30".
Hamilton 3 in. H x 30 in. W x 30 in. D Condenser Pad-ACPD3030-3 - The Home Depot
Hamilton 3 in. H x 30 in. W x 30 in. D Condenser Pad-ACPD3030-3 - The Home Depot
RoBoRaT
PoPeYeD'SaiLoRDuDe
zanary
Active Member
19 is the correct amount. Here is my 3 stack measurements from wall and I also got you the height from the garage floor when it’s sitting on it’s own legs.
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Thanks for confirming Zanary! The 2 "spacers" were the X factor for what I'm doing (stand to be exact size of the PWs and match in color), but now knowing that it's 19" tells me everything I need to know to make the last and final cut with the buzz saw tomorrow.
Next steps:
Get dry 2x4s (or 2x6s, or 2x8s) for the additional bracing
Get flashing for the floor
Screw everything together
Paint to match the PWs
Tap my fingers while waiting for installation date to get assigned (hoping I'll find out tomorrow that they can do it within 2 weeks)
Thank you ALL that have helped me in this thread...this has been a fun, interesting, and exciting journey so far!
What is the reason for the maximum height above the ground to be 1m (39.4 inches) ?
Our ceiling is high enough (136") to accommodate vertically stacked PowerWalls.
The height of a single PowerWall is 1.15m (45.3"). If mounted above a floor mounted PW, the upper PW would likely need to be at least 57" (1.45m) from the floor.
Structurally, it shouldn't matter much in mounting at 39.4" or 57" from the floor. The difference might have an impact on mounting/dismounting or in servicing the PowerWall - likely requiring ladders or a platform.
Will check with our installer about this...
Our ceiling is high enough (136") to accommodate vertically stacked PowerWalls.
The height of a single PowerWall is 1.15m (45.3"). If mounted above a floor mounted PW, the upper PW would likely need to be at least 57" (1.45m) from the floor.
Structurally, it shouldn't matter much in mounting at 39.4" or 57" from the floor. The difference might have an impact on mounting/dismounting or in servicing the PowerWall - likely requiring ladders or a platform.
Will check with our installer about this...
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At least in some locations, the power switch has to be located below a certain height. I believe it can't be higher than 7 feet from the floor.
Additionally, having two 275lbs PWs on the same studs is considered too heavy for some city codes.
Someone said the power switch can't be too high for ADA reasons, but for fire safety reasons also, that upper switch needs to be easily accessible for anyone to shut it off in case of an emergency. Without requiring a stool. Hence the 6" clearance needed to the right of the PW also. I SO wish my installers would install them vertically on top of each other...that would have looked so cool!
I have only seen floor mounted free standing Powerwalls in Tesla press images. Every real installation I've seen pictures of has them secured to a wall as well as resting on the floor.
SoundDaTrumpet
Member
The vertical stacking is disallowed because the Powerwall attach to a wall system. The wall system is constructed per a typical wall depicted in house plans. The wall structure passes the Uniform Building Code. Now, mate the Powerwall to said wall structure. Now we have a Powerwall installation which had been UL tested and proven (two studs bearing weight of single PW). Simply said the vertical stacking is not tested nor verified. There is one way out which is to engineer a wall structure to accommodate vertical stacking (submit design, get city structural to buy off, build, and inspect). Tesla said this would need to be engineered and will be costly, and would be best to integrate for new home construction, which requires much forward thinking.
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Mine will be screwed into the 2x4s in the wall using long drywall type of screws, so the stand won't be going anywhere during an earthquake.
Most any other type of screw would give you a better attachment. Deck screws are readily available and would work. Best would be a few structural screws, something made by GRK, SPAX, Simpson Strongtie or Fastenmaster.
Cheers, Wayne
Some jurisdictions are sticky about double stacking, but the Tesla rules as well as the NEC rules allow it. You will need an SE to sign off on it however. The manual tossed around here has outdated information.
Ulmo
Active Member
Those switches can trivially be extended down under six feet. They aren't carrying power leads, just logic leads. If what you said is their actual stated reason, you can easily modify the plans to extend the switch (with engineer approval from Tesla, something I think is possible today; this prediction is only good until December 31, 2019). While not a great curiosity for Tesla, doing so may be mildly curious for their engineers, so they might be willing to specify an extension for that switch. This is especially true right now (and more so in the last two years), so I would expect that curiosity to expire soon, if it hasn't already. But I suspect we will see a recurring theme about this for years to come.
P.S., this is on the back of a lot of changes coming with 2020 NFPA-855.
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