dynESS feed solar to grid instead to battery

kairo123 · October 13, 2024, 10:52am

Hey,

I have activated dynamic ESS recently. It does what I expect but sometimes I find counter intuitive behaviour. Like today.
Its a sunny sunday noon. But the system ist feeding to the grid instead of charging the battery. In addition, the system has planned to charge the battery from the grid this afternoon when the price is lowest.

What is the intention of the system to use the pricier grid power instead of solar to charge the battery?

dESS Settings:

grua · October 13, 2024, 2:19pm

Look here: https://community.victronenergy.com/t/dess-hack-unexpected-bat2grid-and-solar-feedin-green-mode/

savastnas · March 16, 2025, 9:39am

@grua, The system is apparenty set to trade mode. Your link is for green mode.

grua · March 16, 2025, 9:53am

Yes, that’s correct

savastnas · March 16, 2025, 9:54am

I have the same problem, that’s why I noticed.

savastnas · March 17, 2025, 9:48am

I started looking at your code. I think the solution is pretty much the same for Trade mode as well. Even in Trade mode, the system works via the TargetSOC setting. And that’s where the problem starts. TargetSOC == SOC means the system should not take energy from the battery but from the grid, because the grid is cheap. But… hmm… unfortunately this also means that it’s not charging the battery from solar surplus because… yeah…

grua · March 17, 2025, 2:01pm

It’s not mine, it’s @dognose code

savastnas · March 21, 2025, 8:46am

@kairo123 @grua I used this file from current github master:

github.com/victronenergy/dbus-systemcalc-py

delegates/dynamicess.py

master

from datetime import datetime, timedelta
import random
from gi.repository import GLib # type: ignore
from delegates.base import SystemCalcDelegate
from delegates.batterysoc import BatterySoc
from delegates.schedule import ScheduledWindow
from delegates.dvcc import Dvcc
from delegates.batterylife import BatteryLife
from delegates.batterylife import State as BatteryLifeState
from delegates.chargecontrol import ChargeControl
from enum import Enum
from time import time
import json
import logging
logger = logging.getLogger(__name__)

NUM_SCHEDULES = 48
INTERVAL = 5
SELLPOWER = -32000
HUB4_SERVICE = 'com.victronenergy.hub4'

Den här filen har trunkerats. visa original

That fixed the problem for me. It’s not in the latest 3.60 beta version, but it might be a port of the next firmware update.

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dynESS feed solar to grid instead to battery

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