DESS configuration: battery charge at hign noon to relieve the power grid

[MP_Energy12]

Hi Victron community,

How can the DESS configured to achieve this mode für sunny days:

1. In the morning the PV power shall be directed 100% to the grid. No battery loading
2. From 11:00 am to 1:00 pm the power shall be used for battery loading, with a selectable limitation (e.g. 5000W PV = 3000W to batt + 2000W to grid)

System: 1-phase Multiplus 5000/70, Pylontech: 1x US5000, 2x US3000C

No dynamic grid feed-in, no battery loading from grid

Thanks for you response.

B.R. Peter

[BjoernK (Björn Kellermann)]

I experimented with “green mode”
Set buy price to my fixed 39ct/kWh.
Set sell price to dynamic “p”. E.g. the day ahead price.

In this constellation, DESS will discharge during morning price peak (~7-8) to min SOC. It will recharge battery over the day and discharge during evening peak price to a level coping with night consumption.

Unfortunately the strategy to aim for min SOC during discharge and not to 100% (minus prediction variance) can lead to grid consumption in case of prediction variance.

[A-P]

@BjoernK

Unfortunately the strategy to aim for min SOC during discharge and not to 100% (minus prediction variance) can lead to grid consumption in case of prediction variance.

With the new beta Venus, you can adjust the consumption forecasts in Node Red. I’ve used this function to inject a ‘fake’ (large) load a certain number of hours out, to force Green Mode DESS to achieve 100% SOC on a daily basis (rather than falling to min SOC).

[MP_Energy12]

Thanks a lot Björn,

after following you proposal, it works fine for me.

B.R. Peter