The disclosure relates to variable power modular electronic systems for generating unipolar and bipolar electrical pulses and associated uses thereof. In an embodiment, such a system includes one or more pulse generators for generating electrical pulses that can be connected in series; a charging circuit for charging the pulse generators; and a controller communicatively coupled to the pulse generators and the charging circuit. Advantageously, each pulse generator may include an AC/DC rectifier and a DC/AC inverter connected to said AC/DC rectifier in a bridge configuration to generate bipolar output electrical pulses or pulse trains. In addition, the charging circuit may include a DC/DC step-up converter connected to an indirect DC/AC inverter. The system provided in various embodiments of the disclosure also provides a great versatility for adaptation to various applications and high output voltage and current values.