fIn Sweden and maybe other countries an effect tarif is introduced. This means you pay an extra fee based on the maximum kWh per hour you buy from grid during a whole month. Eg, if you buy 2kWh every hour for one month, but one single hour during that month you buy 5kWh, you will pay a fee for 5kWh times 3-5 euro per kWh, just because of that hour that month.
When using ESS you can set a grid point. Usually you want that to be 0W so batteries charge when there is an excess of energy, and discharge when more grid power is needed.
Settinggrid point to 1500W, will make victron to discharge above 1500W, but charge below 1500W. Not very effective when being charged hourly rates for the electricity.
It would be a nice feature to extent the ESS grid settings with more parameters.
Like having two grid points. One for charging, and one for discharging?
Grid point 1: 0W
Grid point 2: 1500W
Charge batteries when below grid point 1, discharge when above grid point 2, when in the middle do nothing, no charge/no discharge.
If both grid points are the same, use it as if there was only one grid point, like today?
What do you think, Victron?
EDIT: One other possible feature for peak shaving could be, discharge enough power to meet a hourly goal. Eg. you allow the system to import a maximum of 2kWh per hour. After this, batteries take over and discharges enough so no more power is bought during that hour.
Some power companies have different fees for different times during the day.
Eg, duing peak hours (7-19) high fee, rest of day no fee, others have fee 24/7. So a time intervall would be nice too
