I have been purchasing Graywind motorized shades for several years = all with solar charger option. They work really well - 100% reliable to move the blinds up and down several times a day. Even though some windows are North facing with 100% shade the blinds get charged with just a little bit of sunshine everyday.
Some people have complained the blinds are noisy - but it is really just a loud hum when the motor activates. There is an option to adjust the motor speed using the RF remote to program the blinds- if you set the speed slow then the motor is quieter.
The Zigbee motors were easy to pair with my Samsung Smarthome hub and I was able to setup automation with third party light sensors to automatically close the blinds during hot sunny periods.
These are well worth the cost!
