EV Charger support

[WillCodeForCats]

Discussed in #564

^{Originally posted by mikedeluca March 27, 2024}
So I was digging around to try to figure out why some sites batteries work and at others they don't show up and I ran across a Modbus address that wasn't one of the 3 inverters.

{'c_id': 'SunS', 'c_did': 1, 'c_length': 65, 'c_manufacturer': 'SolarEdge', 'c_model': 'SE-EV-SA-US-40P', 'c_version': '0004.0019.0036', 'c_serialnumber': '63002925', 'c_deviceaddress': 4, 'c_sunspec_did': 103, 'c_sunspec_length': 50, 'current': 0, 'l1_current': 0, 'l2_current': 0, 'l3_current': 0, 'current_scale': -32768, 'l1_voltage': 0, 'l2_voltage': 0, 'l3_voltage': 0, 'l1n_voltage': 0, 'l2n_voltage': 0, 'l3n_voltage': 0, 'voltage_scale': -32768, 'power_ac': -32768, 'power_ac_scale': -32768, 'frequency': 0, 'frequency_scale': -32768, 'power_apparent': -32768, 'power_apparent_scale': -32768, 'power_reactive': -32768, 'power_reactive_scale': -32768, 'power_factor': -32768, 'power_factor_scale': -32768, 'energy_total': 0, 'energy_total_scale': -32768, 'current_dc': 0, 'current_dc_scale': -32768, 'voltage_dc': 0, 'voltage_dc_scale': -32768, 'power_dc': -32768, 'power_dc_scale': -32768, 'temperature': -32768, 'temperature_scale': -32768, 'status': 1, 'vendor_status': 0, 'rrcr_state': 0, 'active_power_limit': 100, 'cosphi': 0, 'commit_power_control_settings': 0, 'restore_power_control_default_settings': 0, 'reactive_power_config': 0, 'reactive_power_response_time': 0, 'advanced_power_control_enable': 0, 'export_control_mode': 0, 'export_control_limit_mode': 0, 'export_control_site_limit': 0}

This is ID 4 on the Modbus TCP. The model and serial match my Solaredge EV Charger. Feels like this would be interesting functionality to add... I'll try to do some more scanning of registers

[WillCodeForCats]

EV charger appears to present as an inverter based on the sunspec ident block.

[deqw]

Looking at the model it is a Keba P40 charger disguised as a SolarEdge Inverter. Maybe just for presentation purpose?

[WillCodeForCats]

Maybe making it look like an inverter would let it reuse modbus definitions without SolarEdge having to support new types, but also if it looks like an inverter it wouldn't be possible to detect except by trying to match model strings.

If some of those values change when the charger is charging I could make a restricted display for a charger class.

[deqw]

I have been using this Keba integration for a while to control the SolarEdge EV charger but stopped using it. Now using Node-Red on Home Assistant for this purpose which gives me more control.

[WillCodeForCats]

I can find modbus data about Keba P30 but not about P40.

If SolarEdge is just using the P40 rebranded and the P30 modbus still works with the P40, I can try that.

[deqw]

There are others too (like BMW) that rebrand the Keba chargers. I use the Keba API for phase switching (1<->3) and to get some info from the charger. The API works fine. Maybe you already found the Keba UDP Programmers Guide here.

[WillCodeForCats]

I can't use the UDP guide unfortunately, it needs to be modbus through the SolarEdge inverter bus to work with this integration.

[mikedeluca]

The solaredge charger in this case does not apear to be the Keba. Solaredge seems to have their own EVSE for the North American (and I think Australian) markets. https://www.solaredge.com/us/products/residential/solaredge-home-ev-charger. The Keba is this one: https://www.solaredge.com/en/products/residential/ev-charging. I'll try to get some info from it with the car connected and charging. Its technically my secondary EVSE since I primarily use a Tesla wall connector, so I need to move some things to get the car close enough. I suspect your correct, that they just recycled sunspec registers to make things simple. I'll also see what i can pull from setapp.

[deqw]

@mikedeluca the Keba one you reference is a P30, not a P40.

[mikedeluca]

So confirmed in setapp its configured as a solaredge follower, just like an inverter. Also was able to confirm in setapp that it contains FCC ID 2AGPT-PLNX, which is a solaredge comms board. https://fccid.io/2AGPT-PLNX/User-Manual/Users-Manual-rev-pdf-3941269. One interesting thing, the label on the outside proclaims it as a SE-EV-SA-US-40N not a 40P as the modbus returns. probably doesnt matter, but for future readers. Full serial is SJ5121-063002925-B1. In Setapp the serial is SN 05F5EB22-07 in the status page (probably the comms board?) and 63002925-B1 in the information screen. Im running Version 4.20.32/2.2.12/4.20.64 (CPU/EVcharger/WSA). I'm not clear how often these are configured via Modbus vs Wifi or ethernet. Mine is setup that way and is connected directly to inverter #1 for both modbus and AC power.

[mikedeluca]

Debuglog.txt

This is the debug log output from a scan of a bunch of the registers. last few scans are on the EVSE wile charging

[bisscuitt]

I believe I have one of these inverters. It's an SE5000H with integrated EV Charger (Australia) and it would be awesome if I could monitor and control charging over modbus.

Can you give me some advice on how to provide required modbus dumps ?

[laurencei]

@WillCodeForCats - do you have an EV charger?

Not sure if your seen this - but when adding the SolarEdge EV charger - some extra options appear in the SolarEdge app

and this is what it looks like when charging:

Specifically the part I'm most interested in is been able to get the "plugged in status", toggle the "excess solar" on/off, and manually toggle the "charge now"/"stop charge" overrides.

Is there something I can do to help? I'm happy to run some local scans or do some reverse stuff if you can point me in the right direction for what you need?

[laurencei]

I'm not clear how often these are configured via Modbus vs Wifi or ethernet. Mine is setup that way and is connected directly to inverter 1 for both modbus and AC power.

That is how mine has been installed as well.

[laurencei]

I found this guide for the SolarEdge EV charger. Has some specifics on error codes etc that might be useful: https://knowledge-center.solaredge.com/sites/kc/files/smart-ev-charger-installation-guide-na.pdf

[WillCodeForCats]

No, I do not have an EV charger on my system.

There are various modbus scanning utilities that might be able to help. This one is cross platform: https://github.com/SciFiDryer/ModbusMechanic

[laurencei]

I've actually found an issue. When running SolarEdge in "Remote Control" mode, the EV charger doesnt work correctly, specifically the "pending excess solar" option doesnt trigger. I can only trigger the EV charger to work by manually trigger it in the app (or setting a schedule).

Previously the EV charger would absorb any excess solar up to the max charge rate (6.5kw) before sending anything to the grid.

The problem with manual charge is it forces a 6.5kw charge, meaning if I only have 2kw solar generation spare, I'll pull 4.5kw from the grid.

I'm going to reach out to SolarEdge about it - might be a way to get some modbus data on how to control the EV charger ourselves, since the app seems to lose the ability when we do remote control.

(Solaredge specifically gave me remote control back, so I can press them on helping to fix this issue).

[deqw]

Charging on excess solar didn't work for me either. Since two weeks it is working however after an inverter (SE10K-RWB48BFN4) firmware update (0004.0021.0019). And still working after 0004.0021.0021 that it is on now. Load balancing
is also working ok. Before I - could/had to - trigger charging eg. by closing the car again (did not matter if it was open or closed already). Maybe a direction for them to look into.

[laurencei]

Yeah - they responded they have updated the EV Charger firmware - but I cant see it, so I dont know what exactly changed.

Will check how it goes.