Home Battery in belgium

Nicsal

New member
Joined
Apr 9, 2021
Messages
11
Hey,

I started creating my powerwall 2 years ago.

Now that we only get 0.04 euros per kWh injected to grid from surplus solar panels power.

Two years ago I bought my first Samsung INR18650-29E 2900mAh E6 - 8.25A - Refurbished cells,
these come from bicycle batteries that were ridden because there were errors in them, Nkon.nl has tested them.
on some were no spot marks.
for in 14s100p

A year ago I expanded this with another 14s100p
new cells from Nkon.nl,
BG INR18650-26R 2600mAh

a few months ago i did another out brawl of 14s200p,
sony 2150mAh
purchased at bva-auctions.com
these cells have been tested by EnergyCells
there were some problems with the delivery.
but everything to a good end.

now i am working on another 14s200p
with cells purchased at bva-auctions.com
these cells have been tested by EnergyCells
there were some problems with the delivery.
refunt from BVA for the cells that did not come.
more random cells,
samsung 2900mAh
samsung 3500mAh
sony 2150mAh
lg 3500mAh
panasonic 2900mAh




on a delta grid 3x230V
2 victron multiplus II 3000VA parallel
random chargers +-10kW vermogen

the chargers are turned on automatically by a current relay that measures the current from the grid tie inverters
 

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OffGridInTheCity

Well-known member
Joined
Dec 15, 2018
Messages
1,588
Nice work and thanks for sharing :)

>the chargers are turned on automatically by a current relay that measures the current from the grid tie inverters
Sounds like you don't have solar panels? And you're storing energy at low prices and then consuming your battery energy when grid prices are hi?
Could you explain a bit more? (it sounds interesting).
 

Nicsal

New member
Joined
Apr 9, 2021
Messages
11
I forgot to report.
I have:
40x 195W solar panels grid tie inverter 2x platinum 4600W
15x 275W solar panels grid tie inverter SMA 5000W, current sensor - + 5A switches 1kW charger and current sensor - + 15A switches 4kW charger
18x 310W solar panels grid tie inverter SMA 7000W, current sensor - + 5A switches 1kW charger and current sensor - + 10A switches 3kW charger

and my energy prices are:
night and weekend 0.20euro
day 0.25euro
in the winter I charge the battery at night, for the day when there is not much sun to use.
 

Nicsal

New member
Joined
Apr 9, 2021
Messages
11
BMS = Smart Bluetooth 7S-20S CELL Lifepo4 li-ion Battery protection Board BMS 320A 14S

Chargers = Emerson R48-2900
and some 24v1000w power supplies with stepup cc -cv

two grid tie 1000W inverter (working voltage 25-45v) with step down cc-cv 48V to 32V for discharge
 

J_Mack58

Member
Joined
Apr 7, 2021
Messages
40
Man that is a nice setup you have. I'm looking to get some electrical cabinets with the upper and lower ventilation when the plant
I work at closes. They house our Allen Bradley Powerflex drives right now. When we close (in about a year) all the good robust electrical
gear is free game.
 

Nicsal

New member
Joined
Apr 9, 2021
Messages
11
Update: Today expanded with another 2800 cells and a total of 8400 cells
calculated that it would be a - + 66kWh in total

here you can find my design of the voltmeter for the 18650 cell
https://www.thingiverse.com/thing:3786188
 

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OffGridInTheCity

Well-known member
Joined
Dec 15, 2018
Messages
1,588
Congratulations! Its a lot of fun to get a new battery online after all the work creating it.
Will you continue to expand?
 

Nicsal

New member
Joined
Apr 9, 2021
Messages
11
No, I'm not going to expand for the time being.

(here are some old photos)
 

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