#regulate charging accumulators at night time.

1 messages · Page 1 of 1 (latest)

spring terrace
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I heat my house with storage heating (accumulators). I would like to control the charging during the night. I live in Flanders (Belgium) and the Flemish government has a website that predicts the number of hours of sunshine the next day. https://apps.energiesparen.be/stroomvoorspeller. Does anyone have any experience with this?

random ridge
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Yes. What is your goal exactly?

spring terrace
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I would like to make a automation that determines whether I should charge my accumulators overnight or whether I should wait and then charge them using the solar panels during day time.

random ridge
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ok, but you need a whole lot more information to answer that question. So basically you want to know which is cheaper? Overnight or during the day?

spring terrace
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I now have an automation that allows me to regulate to charge my accumulators during the day with my solar panels. But if they have already been charged the night before, this does not make much sense. If I can predict how much sun there will be tomorrow, I can also determine how long the accumulators are allowed to charge during the night.

random ridge
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this is called energy management. Typically you need quite some math to solve that, for example EMHASS can solve this for you

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but for this simple case you could probably calculate how much to charge during the night by hand

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problem is that your storage also loses charge. The more you put in during the night, proportionally the more you lose

spring terrace
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You are right the storage also loses enegy during the night. Now the accumulators are charged during the night. I need this charged energy during the day but especially in the evening to heat the living space. During the day, I have a lot of solar energy. Putting this energy back on the grid during the day while I take it off at night to recharge does not make sense. So I connected my accumulators so that I can recharge them with solar energy during the day. I would now like to charge the accumulators only, say, 50% during the night and recharge the rest during the day with solar energy. But to do this, I obviously need to be able to estimate how much sun there will be tomorrow. Hence my question if anyone has experience with the Flemish government's power predictor.

spring terrace
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thanks for the tip EMHASS. looks very interesting.

nocturne crag
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If you need any help trying to implement EMHASS you can ask any question in the community forum: https://community.home-assistant.io/t/emhass-an-energy-management-for-home-assistant

Home Assistant Community
EMHASS: An Energy Management for Home Assistant

Dear community! I have created a new project called EMHASS, written in Python, to implement an optimized energy management for a household and with easy integration to Home Assistant. The main contribution of this project is that the energy management strategy is… well… optimized! I’ve done this using a real mathematical optimization technique ...