A grid tied inverter, system and method

A grid tied inverter connectable to an electricity grid, the grid tied inverter comprising a DC to DC current fed push-pull inverter operable to generate a current waveform from a DC voltage source, the current waveform being substantially synchronised to the electricity grid, the push-pull inverter comprising a transformer having first side winding connectable to a battery and a second side winding connectable to the grid, wherein a first end of the second side winding of the transformer is connected between a first diode and a second diode, the first diode and second diode being connected in series between a positive output rail and a negative output rail and being oriented in the same direction; a second end of the second side winding of the transformer is connected between a first capacitor and a second capacitor, the first capacitor and second capacitor being connected in series between the positive output rail and the negative output rail; a further winding is connected at one end between the first capacitor and the second capacitor, and is connected at its other end between a third diode and a fourth diode, the third diode and the fourth diode being connected in series between the positive output rail and the negative output rail and both being oriented in the same direction as the first diode and the second diode.