I used to have a solar water heater 15-20 years ago and it worked OK when it was sunny (of course!). However, if it was cloudy/rainy for several days in a row, there was no hot water when it was needed the most.
Do modern systems work better, or is this still an issue?

Best answer:

Answer by nARAALKF.
YOU A STONE COLD **** MACHINE.

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