Glubux's Powerwall


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100kwh-hunter

Member
Joined
Mar 2, 2019
Messages
776
Thanks for the links.
When i started to collect cells it was only for the pond....to save on my electric bill.
But the possibilities never seem to stop.

Why does the small board don't work on tesla's?
So it would be better to buy for each car(future ready) one of those big ones
Thanks
 

Glubux

Member
Joined
Nov 9, 2016
Messages
123
The control pilot signal is a 1kHz +12v/0v on the small board, it works on most EV but Tesla need a +12v/-12v signal for extra safety ;)
 

Klug

New member
Joined
Aug 14, 2018
Messages
2
Hello (ou bonjour, au choix :cool:)

I've been following this thread for quite some time, it's marvelous.

Now I have questions, because I'll be building a quite similar system in a few month (new house being built), the main difference should be I'll use Leaf modules and Leafmon.

I've seen 24 panels (7.4 kWp), is that still your current setup?
37 kWh of charge in a day is with these 24 panels?

I read you're offgrid, do you think such setup would work grid-tied?
I mean using the grid if needed (because of only 20kWh of storage - one Leaf pack) but with NO injection at all.

I'll be going the Quattro way because it has two AC inputs (one for grid, one for the PHEV) and it's supposed to be able to be set up with no injection to grid.
And because it "just works" 8)
 

Glubux

Member
Joined
Nov 9, 2016
Messages
123
Hello Klug !

You're right, for now I have 7.4kWp of solar and my records are around 37 kWh on a single sunny day but don't expect that every day, especially when it's cloudy.
This setup would perfectly work with the grid without injection, that is the easiest way to recharge it if needed and you don't have to change anything with your electricity company.

One thing I don't get is about your PHEV, you want to use it to run your system? as a backup?
 

Klug

New member
Joined
Aug 14, 2018
Messages
2
Hello.

The simulation (PVGIS) says I'll be able to get a bit more than 30 kWh in june, july and august with 5.4 kWp of solar, I might be much southern that you are.

The 2019 PHEV in its higher version (Insight) has an integrated inverter that is able to deliver 1500W of power (they say it can deliver that for 50+ hours when its battery is full and its tank too). So yes, the idea is to be able to use it as a backup (no grid, empty batteries), with a simple design so anyone can plug it in (this is WAF related, she wants to be able to deal with it if I'm not there).

We intended to do the same with our previous car (Lexus) but it's more complex as it needs an intermediate inverter (there's one APC that does the job perfectly). And we replaced the Lexus by the PHEV faster than expected.
 

Lagachette

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Nov 28, 2018
Messages
21
Hello,

I'm near Aix-en-Provence I have 6.6kW or solar panels (18*370W) and my max is 36 kWh a day if those numbers can help you.
My panels tilt is only 17 and I think I would produce more with 34.
@Glubux Do you charge your EV during night ?
If yes, how do manage to not use your powerwall to charge your Tesla ?
 

Sean

Member
Joined
Oct 8, 2016
Messages
936
Lagachette said:
..... how do manage to not use your powerwall to charge your Tesla ?

I suspect he does occasionally usestored energy to charge his EV, I do exactly the same with mine - if the vehicle needs charging, it gets charged, whatever time of day it is - only charging when the sun is shining is impractical.
 

Glubux

Member
Joined
Nov 9, 2016
Messages
123
I avoid to charge at night when not necessary, less stress on the powerwall, and if I have to charge from the grid (winter, cloudy week...), I just plug the EVSE on the dedicated plug.
 

Glubux

Member
Joined
Nov 9, 2016
Messages
123
I made 14 kWh more during lockdown :D


image_rvvpen.jpg


Everything is still working flawlessly :cool:
 

Eric44

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Jan 30, 2020
Messages
21
Un grand malade !

Next step : enlarge the shelter :D
 

Rekim

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Joined
Apr 25, 2020
Messages
8
Wow, what a massive read to see how things have grown... I'm just at the stage of having a 57ah lead acid battery to run my 20watt LED lights and stereo in my garage (Man shed).
Currently I'm collecting cells, testing and getting ready for my build.
True inspiration.
Thanks :)
 

daniel88

New member
Joined
Jan 7, 2021
Messages
1
hello guys im new on to 18650 battery projects,i started to make a setup for my 18650 battery powerwall
the configuration it is 14s 120p 56v 258Ah. am using only original brand cells from 1600 up to 3400mah
for the Bms i plan to use chargery power bms16pro.
the busbar and fuse are not mounted yet!
i want to make the packs like "Glubux" from you i got the inspiration to make the power wall,
all the credits to u

Glubux thank you very much.​

my question it is:
is ok how the packs are configure ?
cells from 1600mah up to 3400mah in a single pack to get 258Ah per pack.
20210107_154221.jpg20210107_154147.jpg20201226_112426.jpgrepackr.jpg20210107_154339.jpg
 

OffGridInTheCity

Active member
Joined
Dec 15, 2018
Messages
2,023
Nice pics

>cells from 1600mah up to 3400mah in a single pack to get 258Ah per pack.
Yes, this is OK as long as the packs have the same total ah / pack. There are other factors that may affect things a bit such as IR. @Wolf has done extensive work and shown (among other things) that IR can really fine-tune pack performance.

Just sharing - not *strongly* pushing....
I have built 84 packs at 260ah each so far - pretty similar in capacity. I didn't pay detailed attention to IR - just added up cells / pack to get same ah. I've found that after putting them in operation, I needed to tweak about 10% of them by adding a few cells (and in 1 case, disabling 2 cells).
What happened is that 10% of the packs seems to sag a little (in comparison to the other packs) during the charge/discharge as they operated - so I started adding a few cells to help smooth things out. Some packs needed 3 cells. Some packs needed 6 cells. Its a slow process over several weeks to make this adjustment - e.g. add 2 cells, use a hobby charger to balance it in better, and wait and see for a few days. The repeat the cycle - till daily balance not needed on any of the 84 packs.

Because of this, I personally leave room to add some cells per pack + room on the shelf to clip on a few cells with cell holders/alligator wires on top of each pack. Once I have them perfectly tuned, the cells are permanently added to the the physical pack in the empty slots.

I use Batrium - so I can turn on/off balancing + its heavy duty balancing which made it easy to see the packs. You're using Chargery - which will have balance on all the time but very slowly on 258ah packs... so it could be a month before any patterns emerge depending on how aggressive your daily charge/discharge cycle is.
 
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