We have this system in Finland and whilst I was sceptical at first, it works much better. Electricity prices are published about 24h in advance for 15m intervals (was 60m up until 2 weeks ago). You can therefore time your usage dependent on demand on the grid (which is correlated to production of course).
We've saved 100s of euros annually on our electric bill by limiting sauna, washing machine + dishwasher to low-cost hours. Sometimes it's impossible and it's days at a higher rate - but for a 2 person household it's costing us 15-20e a month (+ additional transmission costs)
We've saved 100s of euros annually on our electric bill by limiting sauna, washing machine + dishwasher to low-cost hours. Sometimes it's impossible and it's days at a higher rate - but for a 2 person household it's costing us 15-20e a month (+ additional transmission costs)