EVCS don't start - waiting for sun

Q&A and troubleshooting EVCS
, ,
48

when I will increase a feed-in limit from 200W to 1500w, export will increase:

image
image1462×803 106 KB

this isn’t my problem, I have enough power.

49

problem is this situation :

image
image1456×866 105 KB

now when I will connect a car, charging will not start.
I will get information : “Waiting for sun”

50

is the setting in ESS
Self-consumption from battery set to all system loads?

51

yes

image
image1391×301 26 KB

52

I’m sure it’s EVCS setup problem, not ESS setup

54

all is single phase

56

sorry, no.

59

I do not understand what to do and why, but all measurements are right now measured correctly
I have only 1phase system
on the next 2 phases there isn’t any solar production

60

setup is ok :

image
image1423×576 43.4 KB

Running few years without problems

62

EV will not start charging. EVCS will tell : “Waiting for sun”

64

Hi Alex.
So, auto-mode can work without the ‘feed-in’ feature, and it can wake up the MPPTs for EV charging.
I propose the following:

  1. Configure your system without considering EVCS. ‘feed-in’ disable, ESS, etc.
  2. Reset all EVCS settings to default, as I can understand you modified some internal settings related to auto mode. You can use ‘Keep wifi and access settings’ to simplify things.
  3. Disable ‘Allow battery/grid power for auto mode’ or reduce ‘Battery/grid power timeout’ to avoid charging EV from the battery\grid.
  4. Do not use ’ Allow low excess solar power for auto mode’. Seems you don’t need it.
    I think that auto-mode will work with such a configuration.
    If you see any problems - ping me here, I will check the behavior(but before modifications of any internal settings).
66

-OK,configuration done
Actual situation without car:

image
image1379×754 94.8 KB

-EVCS is in the default

-EVCS configuration is now:

image
image1285×426 8.97 KB

I will send situation when car is connected

67

car connected:

image
image977×645 31.3 KB

and Waiting for sun. This information is there immediately when start button is pressed

68

I tried to increase a house consumption, but without any change :

image
image972×644 32.3 KB

but there is enough solar power

69

ok. I’ll send you a PM.

70

Right now it looks like a problem is solved.
Internal change was necessary.
The main value that was changed:
‘Battery powered’. Grid power for ‘feed in’ detection. register 5091 to -10000 to not detect ‘feed-in’ on my system.
Thank you @Nicolas for your help

71

Hi!

maybe I have the same problem. " I have a new EVCS, works ok manual and programed, But in auto mode, says" Waiting for sun" when battery is 100% and system is sending solar surplus to grid (2.5k)

This is a standar solution? I need to make this change in my EVCS?

How can I change this register 5091??

Thanks!

@Nicolas

72

I think it’s different problem. When my grid feed-in was 1500W, auto mode was working without problems.

But if you want to test register change, you can use sw named QModMaster.

73

Hi @Viosmo. Which FW version do you have?
Does your system have more surplus power than 2.5k?
Seems your EV charging by 3phase and need at least (6A*230v)x3 = 4140w.
When the battery is full, does the SoC show as 100%?

74

I have exactly the same issue.
In the morning, it is working. I plug the car in auto mode - When SoC goes above 90 = “start charging at backup battery SoC (%)”.
In the afternoon, when I plug the car when the SoC is already high = 99-100%, the message “Waiting for Sun” appear. The only solution is to reboot the EVCS for the auto mode to work.

Pierre