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Protecting cells from damp air.
#11
(10-07-2019, 06:02 PM)Crimp Daddy Wrote: The vapor barrier was a good suggestion as well, didn’t think of that one.

I hadn't thought of a vapour barrier either, so that's a great suggestion. I'll defiantly add one before putting up the Kingspan. I have enough Kingspan insulation for the sides, roof and doors.
The back boards against the house have been fixed in place with expanding stick and foam not a perfect insulation but better than nothing.
I have also seen a small 50W greenhouse heater that I could use wired through a frost stat should it ever be needed.
I know it would put more load on my batteries but 50W for the few mins it would be on to take the chill off the air wouldn't be that much.
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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#12
Not insulating the existing house wall, to which your battery board is affixed will negate the effectiveness of any other insulation you do fit - the house wall will likely be a cavity wall, so will be at external ambient, will form a cold and moisture bridge to the outside of your enclosure and will form a significant thermal mass that will make keeping the enclosure at a safe charging temperature energy inefficient.

The concept is to form an insulated, airtight box - within which your batteries our housed - the larger leaf pack that I post images of here occasionally is totally enclosed within a 100mm of XPS, the cooling vents from the inverters are fed to the inside of the enclosure, which is also mechanically vented, along with a couple of 80w tubular frost protection heater.

The frosty nights are getting closer.
100kwh-hunter, daromer, chuckp like this post
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#13
Almost need to look into some sort of Sealing Hear shrink wrap ??? Thinking the automotive double walled with the glue. Only issue would be excess heat if the packs were used hard. but in a powerwall they usually are not
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#14
(10-07-2019, 06:54 PM)Sean Wrote: Not insulating the existing house wall, to which your battery board is affixed will negate the effectiveness of any other insulation you do fit - the house wall will likely be a cavity wall, so will be at external ambient, will form a cold and moisture bridge to the outside of your enclosure and will form a significant thermal mass that will make keeping the enclosure at a safe charging temperature energy inefficient.

The concept is to form an insulated, airtight box - within which your batteries our housed - the larger leaf pack that I post images of here occasionally is totally enclosed within a 100mm of XPS, the cooling vents from the inverters are fed to the inside of the enclosure, which is also mechanically vented, along with a couple of 80w tubular frost protection heater.

The frosty nights are getting closer.

To be honest I can drop the whole Powerwall and put it back up in an hour or so, that is weather permiting.
Insulating the back wall wouldn't be that much of an issue.
If I leave the original plyboard up and insulate over the top of it before putting up two new boards to mount the powerwall, I could probably do the whole job in three to four hours.I

All I need is a dry day to get out there and do it.
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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#15
I'd ...

Take the entire board off, Blackjack all walls, floor and ceiling - while it's going off tightly fit the rigid insulation (XPS has a much higher compressive strength) expanding foam any gaps, foil tape all joints - Thunderbolt the board back to the wall (through the insulation) - insulating the door is the easy bit.

https://www.bcprofiles.co.uk/everbuild-9...akQAvD_BwE
100kwh-hunter likes this post
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#16
I insulate my outhouse all across the sides with rock wool and tarp on the outside as a moisture barrier. Picked rockwool over fiberglass just because it handles moisture better. Does have a higher temp rating but I doubt if it catches on fire it's going to do much. My design has the inverter in the enclosure so it's generating a minimum 50W of heat at all times. During the winter months I have a 150W heater attached to a temp controller that kicks in at 45F(7C). It has went through a couple of 0F(-17C) nights without any issues.

Below shows the studs but unfortunately I don't have one with the rockwook in it, just standard 16" studs so the rockwool goes between the studs.
https://secondlifestorage.com/showthread...7#pid34507

Heater
https://www.amazon.com/Lasko-100-MyHeat-...B003XDTWN2

Something like this for temp controller but I could have sworn i spent only $20 for it.
https://www.amazon.com/WILLHI-Temperatur...B07M7TSG5W
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#17
Xps insulation is a very good way to go, better than rockwool.
Rockwool is nice if you can build it in a air tight and dry compartment.
It is more for noise insulation/reduction for inside.

In your situation you can use spray foam, but its very expensive, and you can not master the technique for one wall.

In your situation i would go with xps or pir sheets. (unilin utherm kingspan, bouwdipir recticel ekotherm to name a few)
xps in 3 cm or pir sheets in 4 cm.
Dont forget your floor and ceiling!
In your situation i would not recommend: glas, fiber, natural, rock wool or regular styrofoam(eps) sheets
Use fm330 or fm350 flex foam to seal up some gaps and holes.
Use uniflex https://www.kroon.nl/image/cache/data/34...00x500.jpg to secure the insulation to your wall
Your entrance must be air tight also, quickly solved with rubber strips.
https://www.stiho.nl/INTERSHOP/static/WF...186544.jpg

for the last thing i would do is a dehumidifier to keep the humidity below 65%

Regarding the wheater, yes the last couple of weeks was very extreme wet

@not2bme,
Rockwool vents moisture better when it was wet, glasfiber take up to 7 years to dry when was wet.
Both have very good fire resisting properties.
Glas around 1700c and rockwool somewhere in the 2200c.
Still learning English. Learning Li ion and solar technology.

4200 cells in packs Exclamation above 2500mah and 90%soh.
1500 waiting for testing.

Saving for 3 times phoenix inverter 48/3000 230v to gain also 380v
3 chargers?

Time is our enemy, must work to, the sun is our friend, must relax to.
With best regards
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#18
I've got a few sheets of Kingspan Celotex that I'm going to use.
I will need to pick up a couple of extra sheets for the back of the doors.

All I need now is a dry day when I'm home.
100kwh-hunter likes this post
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


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daromer (10-07-2019, 07:18 PM), chuckp (10-13-2019, 01:25 PM), Generic (Yesterday, 04:15 AM), rettore (10-09-2019, 06:13 PM), ajw22 (10-08-2019, 02:25 AM), OffGridInTheCity (10-07-2019, 02:27 PM), ma3006he (10-08-2019, 07:52 AM), intra (10-08-2019, 06:48 AM), 100kwh-hunter (10-14-2019, 03:19 PM), James-w (10-08-2019, 10:12 PM), huat (Yesterday, 10:40 PM), BatteryMooch (10-13-2019, 04:00 PM), neill121 (10-08-2019, 12:26 PM), GOTMLK (10-08-2019, 08:27 AM), Zennen (10-14-2019, 03:33 PM), barias (10-14-2019, 05:08 AM), w0067814 (10-07-2019, 08:56 PM), Sean (10-07-2019, 10:58 PM), mike (10-07-2019, 08:55 PM), Majorphill (10-08-2019, 02:19 AM), Korishan (10-13-2019, 04:46 PM), PAF (10-07-2019, 01:17 PM), jdeadman (10-13-2019, 04:06 PM), Geek (10-14-2019, 12:07 AM), Oz18650 (10-13-2019, 01:44 PM), not2bme (10-07-2019, 09:49 PM), Crimp Daddy (10-14-2019, 06:04 AM), Redpacket (10-07-2019, 02:35 PM), Ibiza (10-08-2019, 05:54 AM), Bubba (10-07-2019, 10:37 PM), Jim Jr. (10-10-2019, 03:25 PM), Alexander K. (10-12-2019, 11:39 PM)

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