sensed by the first thermostatic control means exceeds a first reference level in the preferred embodiment the thermostatic control means is any suitable device which controls the circuitry of the connector means 12 to disconnect electricity from the heating member 4 when a temperature above 40 u00b0 f is detected by the thermostatic device this device is represented in fig3 by the element 48 located adjacent one of the shells 30 between a heated part and an unheated part of the regulator 14 the apparatus of the preferred embodiment also includes a second thermostatic control means for electrically disconnecting the solar panel 10 from its charging interconnection with the battery 8 when a temperature sensed by the second thermostatic control means exceeds a second reference level in the preferred embodiment the second thermostatic control means is also a suitable device as known to the art the second thermostatic control means of the preferred embodiment detects a temperature above 50 u00b0 f and thereby controls the interconnections so that charging of the battery 8 is discontinued at such temperature in the illustrated embodiment the second thermostatic control includes an element 50 mounted within the container 13 in which the battery 8 is also contained in the preferred embodiment by so placing the thermostatic element 50 there is provided a safety mechanism by which charging of the battery.