Set the solar charging automation policy

• Premise

• Set the automation policy ,charge the EV by solar surplus

  • glossary

  • A simple example

Premise

The EV charger must support OCPP.

For how to integrate an EV-charger to IAMMETER via OCPP, please refer to

 https://www.iammeter.com/newsshow/ev-charger-test

Set the automation policy ,charge the EV by solar surplus

glossary

A simple example

Let us use an easy example to show how this automation policy works.

The first row means:

"During 0:00-06:00, and the SOC of the battery is below 50%, the maximum grid consumption is 3kw."

please note, the maximum grid consumption of power does not equal the maximum charging power.

grid consumption power = charging power + other loads power

For example,

if there is about 1kW of other loads power during this period, then the power that is left for charging would be around 2kw.

The second row means:

"During the 6:00- 18:00 , the maximum grid consumption power is 500 W "

if (solar power = 5kw) and (others load power = 2kw)

Then

The charging power = solar power- others load power + 500 = 3.5 kW.

if (solar power = 3 Kw) and (others load power = 3 kw)

Then

The charging power = solar power- others load power + 500 = 0.5 kW.

This value is less than the minimum power value ,so it would not act.

Please note the charging power would be set within the maximum power. If it exceeds the maximum power, it would be set to the maximum power.

Nice implementation of the feature. It gives a lot of control how to setup the PV consumption, allowed grid consumption at different time during the day. I think that makes a lot of sense.

I wanted to ask at what time interval the "automatic setting of maximum charging power" is adjusting the charging power? Is it once every few seconds, once a minute? Because PV production can be pretty dynamic.

Also, I have a three phase charger, but my car supports only 1 phase charging. Minimum charging level for EV chargers is 6A per phase. So in my case should I set the minimum charging power level to 1380W (1 x 6A x 230V) because I am charging only with one phase or do I need to set it to 3 times that (3 x 6A x 230V = 4140W), because it's a 3 phase charger, to get the 1380W on the one phase? 

Hi:

"I wanted to ask at what time interval the "automatic setting of maximum charging power" is adjusting the charging power? Is it once every few seconds, once a minute? Because PV production can be pretty dynamic."

First, this automation uses the grid power value as the sensor input, so the time interval would not be less than the sensor upload time (1min)
we use 5 mins now and may change this value regarded to the real control effect in the future.
We would use the self-use rate as one of the parameters for the evaluation.

"Also, I have a three phase charger, but my car supports only 1 phase charging. Minimum charging level for EV chargers is 6A per phase. So in my case should I set the minimum charging power level to 1380W (1 x 6A x 230V) because I am charging only with one phase or do I need to set it to 3 times that (3 x 6A x 230V = 4140W), because it's a 3 phase charger, to get the 1380W on the one phase?"

The maximum power is regarded to the total,not just one phase.

But I am not very sure, if the EV only support 1phase charging, how would the charger work?
Charging 1380 from one phase or charging 495 from each phase? 

On the charger itself you can set the current only, minimum 6A. So it depends how you translate the 1380W input on your dashboard to then send over OCPP to the charger. If the charger is set to three phase on your dashboard, I would assume that you take the power value, divide it by 3 and then divide it by 230V to get the current value in Ampere. Can you confirm that?

In that case I would need to set the minimum power to 4140W. But the problem then is that my PV excess production is very rarely if ever over 4140W. So it would never trigger that feature. 

Alternatively could i set the charger in your dashboard as single phase charger, so that then I can set 1380W to get the 6A on one phase? Will that work, even if the charger is actually a three-phase charger? Or will that cause problems in the communication over OCPP?

laoliu

Hi:"I wanted to ask at what time interval the "automatic setting of maximum charging power" is adjusting the charging power? Is it once every few seconds, once a minute? Because PV production can be pretty dynamic."First, this automation uses the grid power value as the sensor input, so the time interval would not be less than the sensor upload time (1min)we use 5 mins now and may change this value regarded to the real control effect in the future.We would use the self-use rate as one of the par

Hi,

When we checked the log, we found that your charger returned reject for setting the charging profile message, and the suspicion is related to the setting of the charger so please confirm whether there are relevant options in the setting interface that can be changed.

Aha, and in general the charger chargers only over one phase 1380W for the minimum power output (6A, 230V). There is physically only one phase pin connected on the car. 

Hi, at the moment I don't have the car yet. So it's trying to set the power level without a car connected. I'll get the car in October, so only then I'll be able to test the feature with a car connected.

guanvee

Hi,When we checked the log, we found that your charger returned reject for setting the charging profile message, and the suspicion is related to the setting of the charger so please confirm whether there are relevant options in the setting interface that can be changed.

Hi,

Are you using Wallbox - Pulsar Plus? If yes, Ensure Eco-Smart mode is disabled.

• Open the app 
• Under Settings select Upgrades 
• Set the Eco-Smart feature to Off

Hi Eco -smart move is off. I can't even enable it without their specific smart better connected via modbus.

Otherwise there isn't really any other setting. Should the charge power setting also work without a car connected to the charger?

Yes, I have Wallbox Pulsar Plus. 

guanvee

Hi,Are you using Wallbox - Pulsar Plus? If yes, Ensure Eco-Smart mode is disabled.Open the app Under Settings select Upgrades Set the Eco-Smart feature to Off

Hi,

The current way of setting the power limit is to allow operation in the non-charging state, but each charger has its own control logic, so wait until it is connected to the car and try again.