Power electronic converters have the potential to transmit data. To meet the communication requirements of inverters, an integrated multi-degree-of-freedom energy-information method for inverters based on ripple peak detection is proposed. First, to address the issue that existing information demodulation methods cannot be directly applied to AC converters, a novel information demodulation method based on ripple peak detection is proposed. On this basis, power carriers are used as the medium for information transmission, and information is embedded into the original pulse signals of a single-phase voltage-type inverter through binary frequency shift keying (2FSK) to achieve the integration of energy and information. Furthermore, leveraging the characteristic of three-phase inverters having multiple power modulation waves, a multi-degree-of-freedom energy-information integration method is proposed. By using multiple power modulated waves as carriers and injecting data carriers as disturbance signals into different power modulated waves, synchronous modulation and demodulation of energy and information are achieved. Finally, simulation models and experimental platforms for inverters are built. The results show that a communication rate of 20 kbit/s can be achieved in single-phase voltage-type inverters and 2.5 kbit/s in three-phase voltage-type inverters, verifying the correctness and effectiveness of the proposed method.