in poland specifically:

• if you want to sell energy to grid, terms absolutely suck
• grid is often overloaded in the summer in areas with large # of pv installations, meaning too high voltage, meaning inverters shut down;
• there was a years long robocall campaign that sold these installations. pv installations are subsidized so more people could set it up and middlemen like this appeared

if you want to reduce your carbon footprint, or you want to use it all without selling energy, or such, you’ll be fine. if you believed robocalls that say that it will get you net passive income from that, tough luck

if you want to get a better deal, get solar water heater. it works always if there are no clouds, even in winter you can get 40C on a clear day

timezone + language settings is another option

It’s always good time for this

one thing i haven’t seen mentioned in the article: when antennas and propagation of radio waves are involved, it’s often useful to think of waves and things they encounter in terms of wavelengths. at 2.4 ghz (12cm), your wall might be 1 or 2 wavelengths, and this might be enough to slow down your wifi. at 5ghz, it might be 5 to 7, and signal degradation will be much worse. at visible light, even sheet of paper is hundreds of wavelengths thick. unless it’s translucent, no signal will come through. conversely, VHF or HF has much longer wavelengths, allowing much longer range and penetration through things like walls.

another important thing is that most of designs of antennas, filters, amplifiers and such components of transmitters and receivers usually operate on some narrow band, several % off carrier frequency. if you want to make that band larger, it usually means that your components have to be larger in terms of wavelengths. because in microwave region wavelengths are shorter, this means large bandwidths in manageably small devices. this works even better for light

black holes can have any density, even lower than water

the magnificent fuck