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Chuck's 18650 14S120P+1 UK Powerwall.
#31
(10-05-2018, 04:19 AM)Geek Wrote:
(10-03-2018, 02:43 AM)chuckp Wrote:
(10-03-2018, 02:21 AM)jdeadman Wrote: I wouldn't but all depends on how bad your OCD is.  You can also get some use out of these packs first and when you need to work on them wrap them then

Yeah I was thinking that too. Not got an OCD as such but I am a bit of a neat freak.

I'd wait. You may have packs that develop problems over time. Perhaps just re-sleeve when you need to rebuild them.

I've already resigned myself to that, and I've also decided I'm going to house them in a cupboard of some sort, so they are going to be out of sight most of the time.

Ok guys, just a quick question to everyone.

Some of you have your Powerwall outdoors while others are indoors,  is there a specific reason for putting them outside? Is it just because you don't have the room needed to fit them indoors or is it for a safety issuse?

I'm getting close to starting my install now and want to go down the best route to start. I have plenty of free wall space in the garage and I also have an access path along the outside face of the garage wall, but any housing will need to be narrow as the path is only 1m wide.
UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
28 X 40P 18650 cell packs/modules configured as 14S 80P.
Sofar Mass Energy ME3000SP AC coupled charger/inverter.
Still sourcing and processing cells for powerwall.
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#32
Mine are inside due to being in Canada and it gets &^%&^% Cold here. we can see -40 C for a long time. For my summer camp I have them outside and away from my Camper as it's summer and i tend to beat that wall up as the loads are intermittent and charging is pretty fast. No failures as of yet other than the self inflicted ones Wink
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#33
I am placing batteries in a 60x60x180 closed server cabinet and it will be placed in my unheated garage.
I expect it to be very safe then

I wouldn’t place it outside, at leadt in my area, vienna

Regards
Karl
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#34
(10-05-2018, 12:48 PM)jdeadman Wrote: Mine are inside due to being in Canada and it gets &^%&^% Cold here.   we can see -40 C for a long time.  For my summer camp I have them outside and away from my Camper as it's summer and i tend to beat that wall up as the loads are intermittent and charging is pretty fast.    No failures as of yet other than the self inflicted ones Wink

Yeah I'm putting mind inside too. I have posted the same question as a poll just curious as to how many are in or out and what the reasons are.
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UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
28 X 40P 18650 cell packs/modules configured as 14S 80P.
Sofar Mass Energy ME3000SP AC coupled charger/inverter.
Still sourcing and processing cells for powerwall.
Reply
#35
(10-05-2018, 04:03 PM)chuckp Wrote:
(10-05-2018, 12:48 PM)jdeadman Wrote: Mine are inside due to being in Canada and it gets &^%&^% Cold here.   we can see -40 C for a long time.  For my summer camp I have them outside and away from my Camper as it's summer and i tend to beat that wall up as the loads are intermittent and charging is pretty fast.    No failures as of yet other than the self inflicted ones Wink

Yeah I'm putting mind inside too. I have posted the same question as a poll just curious as to how many are in or out and what the reasons are.

Hi chuckp just joined the group hoping you will be happy to answer a couple of questions. Can I ask what rated fuses you are using? I'm also in UK how do you go about sourcing your 18650 batteries here there dosn't seem to be to much on the UK ebay site?

Great job with your project by the way really neat! Big Grin
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#36
(10-06-2018, 03:47 PM)bobbolch Wrote:
(10-05-2018, 04:03 PM)chuckp Wrote:
(10-05-2018, 12:48 PM)jdeadman Wrote: Mine are inside due to being in Canada and it gets &^%&^% Cold here.   we can see -40 C for a long time.  For my summer camp I have them outside and away from my Camper as it's summer and i tend to beat that wall up as the loads are intermittent and charging is pretty fast.    No failures as of yet other than the self inflicted ones Wink

Yeah I'm putting mind inside too. I have posted the same question as a poll just curious as to how many are in or out and what the reasons are.

Hi chuckp just joined the group hoping you will be happy to answer a couple of questions. Can I ask what rated fuses you are using? I'm also in UK how do you go about sourcing your 18650 batteries here there dosn't seem to be to much on the UK ebay site?

Great job with your project by the way really neat! Big Grin

Hi bobbolch 

Welcome to the forum. I'm also relatively new here too. But I will try to help. Thanks for the comment.

Definitely a good place to start is to watch some of AveRage Joe's videos, he has done excellent work regarding the methods of fusing and also checkout the FAQ's there is a ton of great information available.

The fusing will mainly depend on how you intend to use your wall. Some builders are as low as 0.5A while others are as high as 5A. 

I'm using 3A glass axial lead fuses on the +ve and the cut off lead on the -ve, I was using a resistor lead for the -ve to start with, but due to ordering 1400 5A glass fuses by mistake I decided to use the leads from those on the -ve instead less resistance.

One thing to be mindful of, using an undersized fuse can cause voltage drop due to higher resistance. I've planned to draw a maximum 500mA per cell, I choose a 3A fuse to keep resistances minimal but a 2A would be more than adequate.

Bear in mind, that a fuse will carry many times its rated current for a very short period of time. In some cases, more than ten times it's rated capacity. So it's a real possibility a 3A fuse could allow 30A to momentarily pass.

Offer watching many YT videos and seeing how the bare fuse wires can sometime glow and melt before blowing i decided to use the glass fuses. At least that way any hot molten metal will be sort of contained should one blow.

I source my batteries from the local pc repair shops and centres, to start with they were a little hesitant to let me have them and I had to apply to the environmental agency for a waste transfer license but it keeps them happy as they can prove they not just dumping them you know H&S bullcrap.

To start with most just gave them to me but now I have to give a few quid for them, everybody wants to make a buck. It is getting harder to source them as I've almost tapped out all the local places.

EBay sucks for used cells/batteries people are charging way to much, the problem is there are those that are prepared to pay the stupid prices asked so they get away with it and even put the price up. Won't change all the time they have punters paying it. I personally won't go down that road, if I were to later buy new cells that's a different matter.

Anyway sorry I slightly digress off on a bit of a rant there, where in the UK are you? I'm down in Cornwall.
UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
28 X 40P 18650 cell packs/modules configured as 14S 80P.
Sofar Mass Energy ME3000SP AC coupled charger/inverter.
Still sourcing and processing cells for powerwall.
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#37
Hi Chuck, thanks for taking the time to reply I very much appreciate it. I live up in Norfolk. Have you tried your council recycle center or is that a waste of time as I guess they must already have firms in place for this? Is getting a waste transfer license complicated/expensive and how do you get rid of your faulty cells and the plastic packaging from the battery compartment?
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#38
(10-07-2018, 11:31 AM)bobbolch Wrote: Hi Chuck, thanks for taking the time to reply I very much appreciate it. I live up in Norfolk. Have you tried your council recycle center or is that a waste of time as I guess they must already have firms in place for this? Is getting a waste transfer license complicated/expensive and how do you get rid of your faulty cells and the plastic packaging from the battery compartment?

i,m in manchester and have a lot  cells to sell for DIY projects if need in uk  i can supply whatever you want
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#39
Yeah

Finished processing my next batch of cells ready to build my second string of 14S40P.



Now I need to crack on with twisting and bending the busbars.

Hoping to get an order in soon for the Batrium and inverter.
UK Southwest.

7 kWp Solar Panels (28 x 250Wp Shinetime Mono).
14 X APS YC500i Micro Inverters.
28 X 40P 18650 cell packs/modules configured as 14S 80P.
Sofar Mass Energy ME3000SP AC coupled charger/inverter.
Still sourcing and processing cells for powerwall.
Reply
#40
Looking good. I've processed enough to make my first 2 strings of 7s40p. Still have many cells to process but I'm trying to keep each set of 7s perfectly balanced so when I stack them up the entire wall stays balanced.
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