I am bad at calculations...I would be using a 12volts 7Ah Sealed Lead Acid Battery
with the following specs:
Charging perimeters:
Constant Voltage Charge with voltage regulator (27 degrees celcius)
Standby use: 13.6V - 13.8V
Cycle use: 14.1V-14.4V
Max. Initial Current: 1.4A

kindly help i want to build a tank circuit also please confirm if a tank circuit would ensure that my inverter does not malfunction during cranking!! thanks guys