GoodWe Power Limit versus Active Power

Energy
1

As of this week we’ll be switching to an dynamic energy contract. As such I would like to be able to limit the Solar power when their is a very high negative price. The GoodWe integration is up and running but I don’t understand to the full my own solution. :smiley:

I have the GW05K-DT G2 inverter and if I access that through the SolarGo app in supplier mode I can go to Advanced Setting - Power Limit and there enable Power Limit. Going back into HA and adjusting the Net Exportlimit updates the value if I look in the SolarGo app. However as soon as I hover in HA over the Net Exportlimit it starts to slide to the left and right and won’t send any updates any longer. That doesn’t work for me sadly enough.

However, I found out that there is another possible candidate to restrict the output, If I go into SolarGo - Advanced Settings - Safety Parameter Settings there I find the Active Power Mode. Going in that submenu I can enter a percentage between 0 and 100 procent being 0 no output and 100 full output.
I manage to control that element using Postman so I could integrate this into my HA automation. However, does anyone know of the difference between these two settings? In the end they both restrict the Solar output but I don’t fully understand if using the Active Power percentage is wise.

2

@BartBerg I suspect the difference to be that ‘Power Limit’ is an export limit, but still allows house consumption to draw all needed power from the inverter.

The ‘Output Active Power’ sets the total output of the inverter, but does not take the Smart Meter house consumption into account.

I manage to control that element using Postman so I could integrate this into my HA automation.

Can you tell me how?

3

I also struggled to understand the difference.
So I called Goodwe :smiling_face: the difference is that the power limit is communicating with smart meter. GM3000 for example. If you don’t have that than the power limit doesn’t do anything. If you have it than it makes sure that all the generated pv power is consumed in house and the rest is going back to the public grid until you set the power limit there. Than it makes sure no more power than the limit you set goes back to public grid. All other power is consumed in house (devices and or batteries)

Now the active power output is a limiter the settles the total amount of generated power by the pv’s. So let’s say that you don’t want to have more than (I have a Goodwe gw5000) 4600 watts going over your network than you can limit it to 92%.

4

The Active Power setting sets the inverter’s total maximum output as a fixed percentage.

Export limit requires a CT (current transformer/clamp) to work. The CT monitors the total import/export power from the grid. If you set an export limit, the inverter will dynamically control its output so the total power exported to the grid does not exceed that limit.

Can you please let me know how you used postman to control the Active Power? The Goodwe integration only seems to have the export limit parameters, and I don’t have a CT to use this function.