Tibber, Pulse Smart Home Module experiences?

2023-07-03 16:03:36

At energy charts there is also the market electricity price, intraday and day ahead. If we assume 15c costs, it would have to fall below -150€/MWh for you to still receive money. For it to be worthwhile to feed in photovoltaics, it would have to fall to around -70€/MWh. You can play around with that a bit.

2023-07-03 16:07:02

I have been using Tibber since February 23. Since March also with the Pulse Eye on my 2-way meter. I have a photovoltaic system with 7.2 kVpeak, a 7.0 KW SolarEdge inverter, a BYD storage with 8kW and an APL wallbox. I drive a 2-series BMW PHEV with an 8KW battery that drives a 50kW electric motor in the rear. Additionally, the car has a 160 hp gasoline engine.

In March I paid €58.33 for 170 kWh. In April for 93 kWh €39.12, in May for 67 kWh €32.65 and for June I will pay €44 for 177 kWh. On top of the fluctuating market price, a monthly €14.94 for Tibber basic fee + metering point fee + network usage fee is added. This basic fee is already included in the prices mentioned above! Overall, I have NEVER paid so little money for the remaining electricity as with Tibber. Rarely but quite possible is that you get money from Tibber for the CONSUMED electricity. Yesterday we had a negative price of 48 cents/kWh for 1 hour!

The Tibber app communicates directly with my BMW. When I come home in the afternoon and my photovoltaic system produces more than 3.6 kWh surplus power, I charge the car directly. Otherwise, I let Tibber decide; usually charging is interrupted after a short time and continues at night. The only thing I have to do in the app is to switch the "Smart Charging" function ON or OFF depending on the surplus power from the roof. P.S.: The photovoltaic battery stays out of this. I don’t want to store the cheap electricity in the battery to then charge the car with it. That doesn’t make sense during the expensive morning and evening times. Then I need the electricity from the BYD storage.

One more tip: I have a hot water controller that heats the domestic water during the day with surplus power. Additionally, I can set the controller to heat the water until 6 a.m. The energy comes from the photovoltaic storage. This means warm water in the morning and at least a half-full storage for the expensive morning time. The storage is refilled during the day at least 7 months a year and is available to me in the evening. Nevertheless, I still get about €35-40 / month for the surplus power that I feed back into the grid.

My electricity consumption has dropped within two years (time of building photovoltaic system, photovoltaic storage, hot water controller) from 3,800 kWh to about 1,800 kWh.

I can only advise everyone: fill your roofs and use Tibber for the remaining electricity.

Thank you very much for your detailed report. We are just a bit afraid of two scenarios. One: A similar case as in Texas, with that Blizzard Blackout, where the market electricity price rose to 9000 US dollars per MWh for several days and people were overwhelmed by their bills. I don’t see that as very likely for Germany that something like that happens and fully hits the consumers — but still possibly? How do you assess something like that?

And secondly: How will it look in winter? Like many solar systems, this one will also produce less in that season. Wind energy should actually also work in winter, but generally I would assume that electricity prices rise in winter? I find the energy price charts of the last 2-3 years hard to interpret. Crises, war and uncertainties have caused enormous price fluctuations. We will have to buy significantly more in winter than in spring/summer/autumn, and with heat pump + electric car + big house + home office + gaming PCs we generally have a high electricity consumption. We therefore wonder if winter won’t throw a wrench in the works. The billing amounts you mentioned are of course tempting (although we tend to mentally double them for our consumption). But with a classic electricity contract you also pay installments on the annual consumption and balance out fluctuations. I’d be interested in what the Tibber additional purchase costs in winter months are.

2023-07-03 17:17:26

Just a little thought experiment: do you always fill up at the same gas station or do you only refuel (car, gas, heating oil tank) when the price is guaranteed not to drop further for 2 months? I behave when refueling my car and heating oil by paying attention to the prices and refuel when the price is low, not when the tank is empty. American grid problems are not applicable to the Europe-wide interconnected power grid in Germany. The probability of a worst-case scenario is like playing the lottery. I also assume that a.) my consumption increases in winter and b.) the price for wind power at Tibber will also rise. Two years ago, I paid a monthly advance of €78 for electricity, in spring last year €109, and from July I should pay €146/month for an average electricity price that was far from the market price. Today I say: thank you very much, the greedy power companies have forced me to act. What the grid regulation intends and the government supports are exactly the flexible electricity prices. Combined with photovoltaics, I halve my electricity amount, cut my heating oil volume, now pay on average 21ct/kWh, and additionally "refuel" about 200kWh/month into the car. Now honestly: as far as I'm concerned, electricity at Tibber can cost 80ct/kWh in winter, I save drastically compared to before over the year.

2023-07-04 10:09:38

Today is a good example:

around noon the price is about ˜16 cents

In the evening at the peak about ˜37 cents

If the photovoltaic system does not supply enough, I would charge the battery from the grid around noon and use it in the evening. With the price difference, conversion losses are also acceptable. This can be automated quite well with solar forecast and self-consumption data. Charging a hot water storage can also be automated. It is of course particularly advantageous if someone is at home at noon and can start the washing machine etc. exactly then.

2023-07-04 10:14:13

That is exactly why open interfaces are more important to me than a locally adjustable "automatic" on the device – something like Tibber was not on the market at the time of my photovoltaic system, so I MUST retrofit it by setting the discharge lock via HA.

For the remote-controlled start of the much-cited washing machine, there are now also small adhesive devices that press the start button. Of course, everything must be prepared for that, obviously.

2023-07-04 10:15:54

Pretty expensive for a summer day - are the costs for Tibber already included?

And the question becomes much more interesting as to how it will look in winter, when a) electricity production during the day is completely different and b) you don’t manage to fully charge the battery.

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Tibber, Pulse Smart Home Module experiences?

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