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What WB kit do I need?
Verfasst: Fr Jun 05, 2020 10:54 pm
von courage2000
Hello!
I don't speak german sorry.
I have my self made Simple EVSE 22kW charger:
- Simple EVSE DIN (Modbus enabled)
- Simple EVSE WIFI
- 5V, 1a for WIFI
- 38A contactor
- Simple EVSE
- 1.jpeg (99.79 KiB) 3775 mal betrachtet
I'll soon install a 22kW PV installation, with a Fronius Inverter.
1. What parts do I need to buy from you, in order to use the excess PV energy?
- 2.jpg
- OpenWB scheme
- (151.87 KiB) 132-mal heruntergeladen
From what I see here, I need a Rpi, a USB-R485 converter and an energy meter (SMD 630).
2. Is there any way I can use directly the Modbus version of SMD 630 v2 (not to use USB - R485 converter)?
If so, how can I connect SMD 630 v2 to RpI pins?
3. Do I need to remove the Simple EVSE Wifi in order to use OpenWB ?
Thank you
Re: What WB kit do I need?
Verfasst: Sa Jun 06, 2020 6:45 am
von openWB
openWB supports EVSE Wifi.
What you need:
- compatible Meter for EVSE Wifi (S0 / RS485 (SDM630v2)
- openWB Standalone
Re: What WB kit do I need?
Verfasst: Sa Jun 06, 2020 3:32 pm
von courage2000
1. Is there any info on how to connect the meter to RPi, what pins?
2. I have a
DTS238-4-M.
http://www.chinaenergymeter.com/product ... -D3403.pdf
Seems to be S0 enabled (12 and 13 - Test pulse output).
It will work?
3. From what I understand
S0 must be connected to RS485/USB converter from Rpi, correct?
Re: What WB kit do I need?
Verfasst: So Jun 07, 2020 1:35 pm
von aiole
Hey,
pls. divide into
* gridmeter and
* charging meter
OpenWB standalone reads gridmeter (EVU-kit or sometimes from PV-Inverter or storage) directly by LAN.
EVSE-Wifi reads it's own charging meter (S0 or RS485 (SDM630v2)) and delivers charging values by API.
Bye aiole
Re: What WB kit do I need?
Verfasst: Fr Jul 23, 2021 8:10 am
von courage2000
With Covid19, I've just finished the building and I'm waiting for the PV installation.
So, from what I understand, the charging meter RS485 (SDM630v2) is optional for my home installation (only one user).
OpenWB should work with the grid meter for PV charging modulation
Thank you!
Re: What WB kit do I need?
Verfasst: Fr Jul 23, 2021 11:40 am
von aiole
Charging Meter SDM630 is not optional. It's necesarry for WB control (feedback power & A per phase).
EVU-meter is most important for controling feedin & consumption, but if not available you can use a fixed value.
PV-Meter is option. Only to see PV-values - not for controlling.
Re: What WB kit do I need?
Verfasst: Fr Jul 23, 2021 11:46 am
von Amok83
If your PV will have an EVU-meter, it could be compatible to openWB as well.
There is a compability list on the website of openWB.
Otherwise you would need the EVU-Kit to be able to charge controlled according PV power.
Re: What WB kit do I need?
Verfasst: Fr Jul 23, 2021 1:30 pm
von courage2000
Amok83 hat geschrieben: ↑Fr Jul 23, 2021 11:46 am
There is a compability list on the website of openWB.
Can you provide the link? I could not find it.
Thank you
Re: What WB kit do I need?
Verfasst: Fr Jul 23, 2021 2:05 pm
von aiole
Re: What WB kit do I need?
Verfasst: Mo Aug 09, 2021 11:07 am
von courage2000
aiole hat geschrieben: ↑So Jun 07, 2020 1:35 pm
Hey,
pls. divide into
* gridmeter and
* charging meter
OpenWB standalone reads gridmeter (EVU-kit or sometimes from PV-Inverter or storage) directly by LAN.
EVSE-Wifi reads it's own charging meter (S0 or RS485 (SDM630v2)) and delivers charging values by API.
Bye aiole
My Type B RCD, Rpi3 and meter SDM630v2 are are planned to be in the main electric enclosure, inside the building.
The SimpleEVSE Wifi charging station is outside the building ~15m.
As I already have Simple EVSE DIN, with Modbus, but no RS485 module I see two options:
1. I get a "UART - RS485 converter" for my SimpleEVSE DIN, hook it to an RS485 - WLAN converter (I have very good WIFI coverage).
I will not use the EVSE WIFI anymore.
OpenWB will control the station directly via Modbus.
rPI3 (lan connected) + USB-RS485 converter to connect the SDM630v2 (on EV charger circuit) inside the electric panel, in the building
2. I use the existing charging station (SimpleEVSE WIFI), but I will integrate an S0 counter outside (next to the charging station).
I have a
hiking dts238-4-m S0 enabled meter.
The SimpleEVSE WIFI will communicate via API with OpenWB the charging current, but I'm not so sure if S0 is reading the current amperage used.