How does a solar pool heater work?
After connecting to solar panels, the pool heater can automatically start in the morning and heat your pool during the day using the power of the sun alone. No grid connection is required. It can then turn itself off when the sun goes down.
You can add AC connection as a backup and control it all via Wifi, but either way you can extend the usable time of your pool by months.
This can also cool your pool in hot weather!