You may want to run the PTLevel long range wireless on a solar system but how big of a system do you need to setup?
Now, some big things to note is that the below numbers are based on the current default power setup. You can modify the power settings which would require you to size your solar system accordingly. With that in mind, the transmitter basically sleeps at 40uA for the set period of time set in the first power parameter. Then, the "wakeup" period to check the level uses around 10mA for approx. 200ms. Finally, whenever the level is radioed in, either when the level has changed greater than x percent or when the schedule requires, the transmitter draws around 140mA for around 500ms to transmit and receive a response. Lastly, if there is no receiver response, this is tried seven times before restarting the schedule.
So, if you kept the default schedule/power setup, the rough power draw is 0.04mAh over a 24hr period of time. Since this is quite small, you can add a bit more to the power supply so that you're covered for extraneous communication tries due to great range or higher reports due to great level changes.
Lastly, the voltage requirements for the dual power source devices is anything between 5v and 12v dc. You can also do all this with the default Long Range Wireless PTLevel without the dual source option. Just simply wire in your solar system to where the batteries would go. If you need any assistance with this, please feel free to create a ticket and we'd love to help.