Solar trickle charger for lead acid batteries

Claim 1

A solar trickle charger for batteries comprising: a multi-solar cell power source circuit; a DC to AC inverter multi-vibrator circuit connected to said multi-solar cell power source; a transformer with a primary coil a part of said DC to AC inverter multi-vibrator circuit; and a secondary coil; a four diode rectifier bridge circuit having a first set of opposite terminals connected to said secondary coil, and a second set of opposite terminals connectable to the two terminals of a battery; wherein there is a higher turns ratio with more turns in said secondary coil than in said primary coil yielding a higher AC voltage output from said secondary coil; said DC to AC inverter multi-vibrator circuit includes two transistors having a common electrode connection of first electrodes of said transistors connected to a first capacitor connected to a tap of said primary coil; said multi-solar cell power source circuit having a first lead and a second lead with said first lead connected to the junction of said first capacitor and said tap of said primary coil, and with said second lead connected to the junction of said first electrode of said transistors common connection and said first capacitor; and with opposite ends of said primary coil connected to second electrodes of said transistors and to resistors connected to the bases, respectively, of said transistors; said two transistors are NPN type transistors with said common electrode connection of said transistors a common connection between emitters of said two transistors; the opposite ends of said primary coil are connected to the collectors of said NPN transistors and each on through said resistors, respectively, to the base of the opposite transistor of said two transistors from transistor collector connections; a current limiting resistor is included in connection means to the two terminals of a battery; said connection means includes a two wire plug and socket connection; said multi-solar cell power source circuit has a two wire out line cable connection to circuitry within a circuit box containing said DC to AC inverter multi-vibrator circuit, said transformer, and said AC to DC four diode rectifier bridge circuit; the plug of said two wire plug and socket connection is mounted on said circuit box; said trickle charger is a pulse output trickle charger including a second capacitor connected across said second set of opposite terminals of the four diode rectifier bridge circuit; and trigger circuit means including a zener diode and a SCR with a control electrode connected to the anode of the zener diode, connected in said connection means from said four diode bridge rectifier subject to being biased to conduction in repeated successive pulses of conduction when said second capacitor is repeatedly charged to a voltage bias level that is said trigger circuit means voltage bias to conduction level.