Check that the batteries are charged. Battery voltage is displayed in the Wi-Fi App once connected. Batteries are fully charged at 4.2 volts, at 3.4 volts the SolSat 5 needs to be recharged. Each SolSat comes with a 5 volt USB Charging Cable.
Using a higher voltage (over 6 volts) to charge the SolSat 5 will damage the electronics.