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Chris's Build Thread
#71
(11-01-2018, 01:51 PM)whoinow Wrote: I made a mistake in my drawing and the cells were 8.91mm causing me to choose the wrong spacer size, 8.74mm. So after fixing that (cells are average 8.45mm), I ordered 100 7.94mm and that should do it. I might need shims between the cells and the acrylic to make sure the cells are properly compressed. But the idea seems to work.


Where did you get the spacers? I am going to use your idea to build the packs. Thank you!
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#72
(02-14-2019, 09:18 PM)whoinow Wrote:
(02-10-2019, 06:15 AM)Dallski Wrote:
(02-09-2019, 11:31 PM)whoinow Wrote: Permit approved! I pick it up on Monday. In the next couple weekends I will put the solar up. My electrician is coming Friday to install the ATS and whatnot. Progress!

First off, congratulations on the permit! I have lots of questions. I see from your inverter thread, you are from the US. What did you put on the permit as far as the batteries go? How did the AHJ hold you up on the inverter not being approved by a NRTL, but not on the batteries, charge controller, BMS, etc.? You mentioned you were working with a solar designer, but that you will be installing them yourself over the next couple weekends. Did the AHJ give you any resistance about you performing that work? Just curious as I was going to start a thread on this very topic. Your the first I've seen actually get a permit for a diy powerwall!

Hey there.
Yes I am from the US, SF Bay Area California specifically. I told the plan review company my AHJ uses that I am making a DIY battery bank and they didn't mention anything about the UL listing. I don't know why they didn't get hooked up on the batteries and I can only hope the inspector doesn't have an issue. I did write a fairly detailed 'spec sheet' for the battery, which may have helped.  I did work with a solar designer for a bit, but that relationship didn't work out, quickly. So I did the entire permit package myself. The AHJ also appeared to have no issue with me doing the install myself. Let me know if you have any additional questions!

I'm in Southern Oregon - and likewise the City didn't even blink at my 18650 battery bank.   I did have to prove that I wasn't hooked to the grid (e.g. off-grid) - but once I convinced him of that he just said A-OK and left Smile
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#73
Don't take for granted where you live. I put up a small 1kW ground mount solar array 150 feet from the next nearest house without a permit (getting a solar permit required 4 committee approvals, a public hearing, an appearance review, and certified mailings to 33 of my closest neighbors) and not only did the AHJ make me take it down instantly, but also changed the law immediately after to ban ground mount solar so I wouldn't try again. I kid you not, most of the laws in my Village start out with "We want to encourage X" and then they go on to limit X as much as the State allows. I know the next question is why not go rooftop, but in my area, I would lose way more money in lost home value with solar on my roof than I would ever save with solar. I'm just going to save that for my next house. I'm more than a year out from finishing my Powerwall, anyway, so I've still got time.

So anyway, that's why I was kind of shocked that an AHJ would give a permit on homemade battery packs, because the one I'm in right now is so bad.
Formerly known as Dallski
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#74
(06-26-2019, 05:11 AM)Generic Wrote: [...] not only did the AHJ make me take it down instantly, but also changed the law immediately after to ban ground mount solar so I wouldn't try again. [...]


I've heard of several such idiotic backward NIYBY cases and I've been wondering... can't you mount them on the most basic of trailers?  Insist it's for your camping trips, and are only "temporary" chained to the ground to prevent theft?
I think I'd do that just to middle finger them back.  Big Grin
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Modular PowerShelf using 3D printed packs.  30kWh and growing.
https://secondlifestorage.com/t-AJW22-s-...PowerShelf
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#75
(06-26-2019, 08:22 AM)ajw22 Wrote:
(06-26-2019, 05:11 AM)Generic Wrote: [...] not only did the AHJ make me take it down instantly, but also changed the law immediately after to ban ground mount solar so I wouldn't try again. [...]


I've heard of several such idiotic backward NIYBY cases and I've been wondering... can't you mount them on the most basic of trailers?  Insist it's for your camping trips, and are only "temporary" chained to the ground to prevent theft?
I think I'd do that just to middle finger them back.  Big Grin

If you are allowed to have demountable buildings, just mount the system on pads. Then it can be classed as a temporary structure. I don't know how the rules work there, but I know that would work here.
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#76
Yes, I live in a NIMBY area! They are literally putting banners up because they signed up (got a large under-the-table bribe) for 100% renewable electricity for our municipal aggregation (local governments "saving" people money by choosing an electric supplier for them (our state decoupled electricity generation from electricity delivery)). Yet they have the most anti-green laws on the books. From composting to rain barrels to solar, it's NIMBY.

Anything with wheels can only be parked on driveways, in garages, or on the street. I know there are rules limiting the time a trailer can be parked, even on your own property. And even then, connecting the panels to the house in any way triggers permits, ordinances, and everything. Even "off-grid" needs a permit, as any wires entering the home need to be permitted and to code.

Luckily this is still America, and I'm not tied to my house. The average American moves 11 times in their lifetime, and I'm on my 7th place, so I think it's time to go somewhere else. I won't have a hard time selling my house, there are a lot of Sheeple out there!
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Formerly known as Dallski
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#77
(06-25-2019, 05:57 PM)ipcipher Wrote:
(11-01-2018, 01:51 PM)whoinow Wrote: I made a mistake in my drawing and the cells were 8.91mm causing me to choose the wrong spacer size, 8.74mm. So after fixing that (cells are average 8.45mm), I ordered 100 7.94mm and that should do it. I might need shims between the cells and the acrylic to make sure the cells are properly compressed. But the idea seems to work.


Where did you get the spacers? I am going to use your idea to build the packs. Thank you!

Hey sorry for REALLY late response. These are the ones I used: http://www.aluminumspacers.com/as38-14-20

(06-26-2019, 05:11 AM)Generic Wrote: Don't take for granted where you live. I put up a small 1kW ground mount solar array 150 feet from the next nearest house without a permit (getting a solar permit required 4 committee approvals, a public hearing, an appearance review, and certified mailings to 33 of my closest neighbors) and not only did the AHJ make me take it down instantly, but also changed the law immediately after to ban ground mount solar so I wouldn't try again. I kid you not, most of the laws in my Village start out with "We want to encourage X" and then they go on to limit X as much as the State allows. I know the next question is why not go rooftop, but in my area, I would lose way more money in lost home value with solar on my roof than I would ever save with solar. I'm just going to save that for my next house. I'm more than a year out from finishing my Powerwall, anyway, so I've still got time.

So anyway, that's why I was kind of shocked that an AHJ would give a permit on homemade battery packs, because the one I'm in right now is so bad.

This sounds like a nightmare.

More updates! I am adding 4.8kW more solar and everything that goes with it. Another Schneider solar charger is already in. 16 Canadian Solar 300w going on the garage.

Schneider MPPT80-600 Solar charger and solar breaker


Running the cables to the main panel


Second breaker, lines from the second charger and the join terminals. (Ignore the ugly wiring there on the upper right here. It was quickly done to control a 12v exhaust fan in the gable vent)


Panel delivery day!
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#78
Panels are up! Picture from the front was taken early evening, thus the shading.

 


Now that I have 2 solar chargers, my Batrium to Schneider translator needed to control them both. The translator can now support N chargers and will set charging currents from the Batrium (limited, full, etc).


I have also setup influxdb with Grafana to show data from the Batrium, IotaWatt and the Schneider equipment. Pretty happy with the layout and dataset so far.

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