2 PWs coming where should be mount them

[sashton]

Well my installation really looks rough in comparison! My excuses are: the walls are about 900 years old, far from vertical and bonded with soft lime mortar. The only way I could get anything roughly straight was to attach them to 4x2s dropped from the roof joists. The second stack of PWs even had to have packers under one end just to keep them level. No fancy conduit just basic SWA.
...still it functions

 

[SMAlset]

Well my installation really looks rough in comparison! My excuses are: the walls are about 900 years old, far from vertical and bonded with soft lime mortar. The only way I could get anything roughly straight was to attach them to 4x2s dropped from the roof joists. The second stack of PWs even had to have packers under one end just to keep them level. No fancy conduit just basic SWA.
...still it functions
View attachment 515173 View attachment 515170

Your equipment in UK looks so different from our here in the US. So assuming in the last photo that's the Gateway 2? Much smaller.

 

[Merrill]

Probably never pass code in California.

 

[jboy210]

Probably never pass code in California.

They might grant a "historic" exception for 900 year old walls.

 

[bob_p]

Here's a better picture of our 4 PowerWalls in the garage with the rest of the equipment on the other side of the wall outside. We specifically asked the installers to avoid having any exposed conduit inside the garage - and they were able to make that work.

Under the two breaker panels to the right of the PowerWalls, the installers added a 14-50 outlet connected to the PowerWalls, which we'll be able to use if we're off grid (after a hurricane).

 

[chrisbailey13]

View media item 120490View media item 120489
I mounted mine on the floor so I could double stack them and facilitate future expansion.

I put all my boxes with the exception of a Disconnect inside because the outside wall faces the front of the house/Street.
View media item 120601

 

[kbaybob]

We have 2 powerwalls being installed in a couple of weeks in the garage. Should we mount them on the garage wall or floor?

We put ours on the floor at the recommendation of the installers. That's a lot of weight to hang on the wall (about 400# each). Ours are also 3 and 4 deep. We designed a niche in the garage for future batteries when we built the house. Garbage cans go there, too. All the panels except the battery breaker panels are outside. More than usual due to the numbers and locations of PV installations.

 

[bkp_duke]

We put ours on the floor at the recommendation of the installers. That's a lot of weight to hang on the wall (about 400# each). Ours are also 3 and 4 deep. We designed a niche in the garage for future batteries when we built the house. Garbage cans go there, too. All the panels except the battery breaker panels are outside. More than usual due to the numbers and locations of PV installations.View attachment 515389 View attachment 515390

250 lbs each, not 400lbs.
https://www.tesla.com/sites/default.../Powerwall 2_AC_Datasheet_en_northamerica.pdf

 

[Branzo90D]

We have 2 powerwalls being installed in a couple of weeks in the garage. Should we mount them on the garage wall or floor?

My two Powerwall2s are located on a concrete pad on the south side of my home outdoors. Tesla said that would be fine.

 

[diyguy]

We have 2 powerwalls being installed in a couple of weeks in the garage. Should we mount them on the garage wall or floor?

Given your situation, I’d agree with pouring a concrete foundation so the curb doesn’t interfere with the dual PW install and then doing a floor mount against the wall. This will give you about 4 inches of clearance from the floor in case of water or mud intrusion. You also might be able to have anchor bolts cast in the concrete depending on how the base mounts. Probably most important, you won’t be depending on your garage studs bearing all the static weight of the batteries plus any additional stresses (you’re N.Cal, didn’t mention seismic, but still...). Plus the garage seismic anchor bolt code calculations didn’t include 500 pounds of battery so it’s best not to depend on them if you do get any shaking or uplift forces.

I have a 1929 2-story house with a basement near Pasadena, CA. It’s hot outside in summer so I wanted the batteries in the cool of the basement. My first choice would have been floor mount for stability and future stacking. But I decided on wall mount due to water pipe/water heater/flooding concerns. The 3/4” plywood panels are mounted on 2x6 pressure treated lumber and secured to the wall with 1/2” epoxied seismic retrofit bolts. Tesla used lag bolts for the battery mount, screwing through both plywood and 2x6s. The sub-panel shown was wired with most of the 120v loads. The emergency disconnect switch box is outside with the panels carrying the 240v loads, remaining 120v loads, and (for now) grid tied PV.

 

[Gadgetgirl]

Does anyone here run PowerWalls without solar?

 

[jjrandorin]

Does anyone here run PowerWalls without solar?

I have a hard time seeing that here in southern california, since solar works so well here, and because you also dont get any tax credit at all if you install powerwalls without solar, automatically increasing the net cost 26% now.

 

[Mokuzai]

Wall mounted framing a gen 3 wall connector.

 

[Gadgetgirl]

I have a hard time seeing that here in southern california, since solar works so well here, and because you also dont get any tax credit at all if you install powerwalls without solar, automatically increasing the net cost 26% now.

Thanks!

 

[diyguy]

Does anyone here run PowerWalls without solar?

I do because I wanted to use my PW for load shifting (charging from the grid Off-Peak, discharging On-Peak). To get the federal tax credit you can only charge from PV. By not charging from PV I’m also eligible for a rebate from California’s SGIP program (confirmed and I’m waiting on the check). I did install 2 grid-tie PV panels last year so I could wrap them into my 2019 electrical upgrade costs and claim the Federal tax credit for that portion.

 

[Gadgetgirl]

I do because I wanted to use my PW for load shifting (charging from the grid Off-Peak, discharging On-Peak). To get the federal tax credit you can only charge from PV. By not charging from PV I’m also eligible for a rebate from California’s SGIP program (confirmed and I’m waiting on the check). I did install 2 grid-tie PV panels last year so I could wrap them into my 2019 electrical upgrade costs and claim the Federal tax credit for that portion.

Thank you!

 

[SMAlset]

View attachment 515738
Wall mounted framing a gen 3 wall connector.

Love your choice of wall color with your reward PWs. Very sharp.

 

[Mokuzai]

Love your choice of wall color with your reward PWs. Very sharp.

Thanks! I actually looked up Tesla color codes that they use for their showrooms to get that color.

 

[jboy210]

Thanks! I actually looked up Tesla color codes that they use for their showrooms to get that color.

Looks great. Do you remember the name of color?

 

[Mokuzai]

Do you remember the name of color?

I used Trout Gray.