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Comment by sharpshadow | Hacker News Reader

Good luck with solar in Germany when you will be paying a fee for feeding in energy to the grid during solar peek time from 2027 onwards.

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Why would that be unreasonable? Generating some power somewhere, sometime isn't hard. Generating the right amount at the right time in the right location is. (In other words logistics.)

So yeah the cost is in moving and storing the electricity by maintaining and expanding the infrastructure.

Do you have a source? Can you "waste" that energy instead of feeding it in?

Why not store it in small and large battery systems and use it later?

Much better yes. I am just thinking that worse case one could burn it to not have to pay, so in reality having to pay would not be a problem.

Late to reply, but nevertheless: More and more people I know have additional heaters in their water systems integrated.

So if there's additional power available and they don't want to give it away for free, they turn on those heaters and boost the temperature of the water that is used for showering etc.

For a four person household these things are around 200 to 300 liters, so you can put a few kWh in them that you can save a day or two later.

It's solar so you can literally just unplug it. Although at the scale of an individual house you can just unplug (or otherwise deactivate) pretty much anything. It's the industrial scale stuff that can't be adjusted on a dime.

I could probably make a small PCB with a light sensor, that disconnects the solar panels (through a relay) once sunlight hits the sensor. So you aren't paying any fees for supplying the grid with energy.

It's the new EEG 2027 Amendment which changes things fundamentally. Instead of receiving a flat payout per kwh, installing and connecting a new solar installation from 2027 will be under market condition contracts and depending on the contract has maybe to pay a fee when feeding in during negative price times. The incentive now changed from 'we need to get solar and pay for the electricity' to 'store your electricity and use it yourself'. All existing solar installations before 2027 will continue to receive the flat payout when feeding in the power for 20 years.

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