I have the same issue with the Primo Gen24 even when setting ramp time to 0, might be worth a try setting other values to see?
Donāt think so! Thatās the whole point of being able to limit close to 0 the feed-in, you need fast updates.
Official plant controllers do the same.
yeah I was hoping that was the case but couldnāt find anything confirming either way. Currently Iāve gone with a 60sec timer which will still be pretty good but will cause more battery use than preferred. This is hopefully just as a stop gap until I get the service password an can enable dynamic load control. Then it becomes a basic on/off function.
Did you end up getting yours working? I also have a Symo 15.0-3-M and also donāt have the service password. Iāve managed to get mine working using modbus only with a node-red flow.
I used the blog tux43 created to get me going and just didnāt do the bits that required the service password.
My flow isnāt the most elegant solution but it does the job. When I want to limit the feed-in Iām just grabbing the house load calculating the % that is of the max (15000). I have a Tesla Powerwall so Iām getting the house load from that but Iām sure you could get it from the inverter. Because of the battery Iām also adding 5000 to the house load if the battery isnāt full to allow for it to charge.
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Just saw this, so I need to call the installer to change the grid profile to International 50z not AUS to get the ramping done instantly?
That may be in contravention of National Electricity Rules as set out in Australian standards (AS/NZS 4777.2:2020), Grid connection of energy systems via inverters Part 2: Inverter requirements, which require grid connected inverters to have specific power quality response settings, which is why there is the AUS A, B & C country code (grid profile) options, for which most of Australia is AUS A.
https://www.energynetworks.com.au/miscellaneous/power-quality-response-mode-settings/
1 Like
Just curious if youāre able to post up the modbus command youāre sending to your Primo unit? Iāve tried all sorts of values on the ramp time command and I can see that the Primo has accepted the value but it still will only ramp in 100w increments every few seconds as you were experiencing with your Gen24 unit.
Here is my automation to my inverter, the addressās are advanced by +1 from the offical spreadsheet as my address offset is +101 on the inverter
The 100W issue needs the installer to come out and change the grid setttings, you have 3 levels of access on the Gen24
Customer: see basic production infomation
Technican: enable control features like modbus and power limiting
Grid: only companies that have been through the approval access with Fronius have these codes as you can damage the inverter if you use the wrong settings
They need to set the grid profile to International 50hz
after the change i also ensured to block my inverters from accessing the internet incase Fronius tries to change something
alias: 3.2 Dynamic Inverter Power - Gen24
description: Negtive FIT solar will match consumption of house and battery
trigger:
- platform: time_pattern
enabled: true
seconds: /5
condition:
- condition: state
entity_id: binary_sensor.amber_grid_price_negative
state: "off"
- condition: state
entity_id: sun.sun
state: above_horizon
- condition: state
entity_id: binary_sensor.amber_feedin_price_negative
state: "on"
- condition: time
after: "10:30:00"
enabled: false
- condition: state
entity_id: binary_sensor.tesla_wall_connector_contactor_closed
state: "off"
enabled: false
action:
- service: modbus.write_register
data:
hub: MBFronius_Gen24
address: 40232
slave: 1
value: "{{ states('sensor.v2_scaled_power') | int }}"
alias: Set scaling factor 0-10000 being max
- service: modbus.write_register
data:
address: 40233
unit: 1
value: 0
hub: MBFronius_Gen24
alias: Move to new power factor immediately
- service: modbus.write_register
data:
address: 40234
unit: 1
value: 0
hub: MBFronius_Gen24
alias: Set revert time to 0 - Stay at set power
- service: modbus.write_register
data:
address: 40235
unit: 1
value: 0
hub: MBFronius_Gen24
alias: Move to new power setpoint immediately
- service: modbus.write_register
data:
address: 40236
unit: 1
value: 1
hub: MBFronius_Gen24
alias: Enable throttle control - required for command to work
- service: modbus.write_register
data:
address: 40237
unit: 1
value: 1
hub: MBFronius_Gen24
enabled: false
mode: single
Converting the scaling factor, as I have 2 inverters that have a max output of 5100 watts this sensor will ensure that if my home comsupmtion is very high it can never calculate a factor above 5100.
v2_scaled_power:
friendly_name: "Inverter Scaled Power"
value_template: "{{ ((states('sensor.YOUR HOME COMSUPMTION SENSOR IN WATTS') | float) * 10000 / 5100) | round(0, 'floor') }}"
Cheers for that, I was more interested to see the automation for your primo unit as it changes setpoint instantly going by the video you posted earlier.
Iām having the issue with my primo unit that you were having with your gen24 unit. As far as I can tell Iām writing to the correct modbus addresses.
40235 ( WMaxLimPct_RmpTms 40236-1 ) should be the ramp time for changing set points but no matter what i set it to, the inverter still ramps down in 100w increments every few seconds. I really want to get it to snap insantly to the value like yours does.
This is one of the automations, I have several depening on the setpoint required.
description: ""
trigger:
- platform: state
entity_id:
- input_boolean.solar_0_3kw_export_limit
from: "off"
to: "on"
for:
hours: 0
minutes: 0
seconds: 5
condition: []
action:
- service: modbus.write_register
data:
unit: 1
hub: primo1_fronius
address: 40232
value: "600"
- service: modbus.write_register
data:
unit: 1
hub: primo1_fronius
address: 40236
value: "1"
- service: modbus.write_register
data:
unit: 1
hub: primo1_fronius
address: 40235
value: "0"
- service: input_boolean.turn_off
data: {}
target:
entity_id: input_boolean.solar_zero_export_limit
- service: input_boolean.turn_off
data: {}
target:
entity_id: input_boolean.solar_1kw_export_limit
- service: input_boolean.turn_off
data: {}
target:
entity_id: input_boolean.solar_3kw_export_limit
- service: input_boolean.turn_off
data: {}
target:
entity_id: input_boolean.solar_no_export_limit
mode: single
As I said. You need to get the installer out.
The only way to change the ramp rate is to have the installer change the grid profile.
After the installer changed the profile on my inverter it started to snap to the new value instantly.
Grid profiles override any local or cloud control request.
Found all of this out by emailing Fronius. They were the ones that told me the grid profile needs to be changed to International 50hz
I was wondering if it were possible not just to use HA to turn off (and on) PV export, but to also do so with PV generation altogether? This would then allow forcing of grid import (instead of using PV first) which would be favourable when grid prices were negative ā¦ and hence be paid to use power.
Yes -
Send a 0 to Conn - FLOAT register 20242 will disconnect it
With a 60s timeout period - so it turns back on without having to send another command (when inverter is off - you canāt turn it back on by sending a command - or maybe you can, havenāt tested it)
Node Red Implementation:
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Many thanks, Iāll do some experimentation
I finally got around to looking into this further. Turns out you donāt need the installer. If you push the back button on the inverter 5-6 times it will ask for a 5 digit code. Enter 73887 and then you can change the grid profile.
Iāve just changed mine so will test it tomorrow to see if it snaps to the new setpoint instantly or not.
1 Like
How did you get that code? Is it universal or device-specific?
Ah found it:
Page 7.
Iām trying to get the current power generation out of modbus because I want to have a go at calculating the WMaxLimPct in HA. Mostly because I have a 5kw export limit to try and respect.
This part works;
modbus:
- type: tcp
# ...
sensors:
- name: modbus_dc_power
slave: 1
data_type: uint16
address: 40277 # with offset of -1
But that information appears to be useless without the scale factor. But I canāt work out what data type the scale factor is inā¦ my spreadsheet says sunssf which I figured might be a float, but float16/32 donāt workā¦
Has anyone else successfully done this?
I havenāt, Iām sure it is possible and get a headache thinking about it. Doesnāt the smart meter do this for you now? If not, why are you trying to solve a problem that you currently have just to be a good citizen?
No? At least not to my knowledgeā¦ is that a thing newer ones do, or can they OTA the thing?
just to be a good citizen
I had enough of a fight getting them to let me export in the first place due to a paperwork screwup by the electricianā¦ but not just that.
When the battery is filling up, I need to allow a trickle out so the battery can detect the excess and soak it up. I donāt need to do that when the battery is already fullā¦ so basically itās microoptimisations.
This is normally managed either by:
- the inverterās output capacity being no more than 5 kW anyway, or
- if the inverterās output capacity is greater than the export limit, the Fronius smart meter supplies the data used by the inverter which has the export limit set in its Dynamic Power Reduction options.
The setting is in the DNO editor section of the inverterās web portal, and requires service level password access:
Assuming you can access that, then scroll down to find Dynamic Power Reduction:
If you were required to apply an export limit less than the inverterās output capacity, then the smart meter would have been a compulsory part of the installation and the dynamic power reduction limit set.