Knowledge
Solar panels, batteries and electricity prices, explained.
Articles on what decides what your system is worth: the economics of a battery, selling surplus power, grid tariffs, negative electricity prices and the inverter's modes. Written from what GridZeno does and what we have measured on our own system.
Does a battery pay off?What a battery saves, calculated with real figures from our own system, and when it doesn't pay off.Read the article What do you get for surplus power?How the price for the power your solar panels sell is calculated, and why it's usually better to use it yourself.Read the article Grid tariffs 2026Low load, high load and peak load at each grid company, winter and summer, and Energinet's tariffs and the electricity tax.Read the article Electricity prices quarter hour by quarter hourHow the buying price and the selling price are calculated for every quarter hour, and why the two are never the same.Read the article Negative electricity pricesWhy the price goes below zero, why the selling price does so before the spot price, and what you can do.Read the article Growatt modesWhat the three operating modes do on a Growatt hybrid inverter, and how GridZeno uses them.Read the article
Electricity prices and figures
Today's prices and the month's figures.
Electricity price today and tomorrowThe spot price and the full price for each quarter hour in DK1 and DK2, with the cheapest hours highlighted.See the prices Electricity price statisticsQuarter hours with negative prices, the largest difference in a day and the dearest quarter hour, month by month.See the figures
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