An electric circuit arrangement for galvanic isolated communication, comprising: - a first battery pack comprising a plurality of first battery cells (401a,..., 407a) and a second battery pack comprising a plurality of second battery cells (401b,..., 407b),- a first transmitter device to monitor a charge condition of the first battery cells (401a,..., 407a) and a second transmitter device to monitor a charge condition of the second battery cells (401b,..., 407b), the first transmitter device including a detection circuit to detect a charge condition of each of the first battery cells (401a,..., 407a) and the second transmitter device including a detection circuit to detect a charge condition of each of the second battery cells (401b,..., 407b), the first and second transmitter devices (100a, 100b) respectively including a transmitter circuit having an input side for applying a digital signal and an output side for generating an output signal in dependence on the digital signal, - a receiver circuit having an input side for receiving an input signal and having an output side for generating a reconstructed digital signal (PWM') in dependence on the input signal, - a transformer for inductive coupling the respective output side of the transmitter circuit of the first and second transmitter devices (100a, 100b) to the input side of the receiver circuit, wherein the output side of the transmitter circuit of the second transmitter device is coupled to the transformer by means of the first transmitter device, - a charging circuit to recharge the first battery cells (401a,..., 407a) and the second battery cells (401b,..., 407b), wherein the charging circuit is coupled to the receiver circuit, - wherein the first and second transmitter devices (100a, 100b) are operated in another voltage domain than the receiver device and the charging circuit, - wherein the respective detection circuit of the first and second transmitter devices (100a, 100b) is configured to generate the digital signal, when the respecitive detection circuit detects that the charge condition of one of the first battery cells (401a,..., 407a) and the second battery cells (401b,..., 407b) is below a threshold value, - wherein the respective transmitter circuit of the first and second transmitter devices (100a, 100b) is configured to generate the output signal in dependence on the digital signal. - a first battery pack comprising a plurality of first battery cells (401a,..., 407a) and a second battery pack comprising a plurality of second battery cells (401b,..., 407b),- a first transmitter device to monitor a charge condition of the first battery cells (401a,..., 407a) and a second transmitter device to monitor a charge condition of the second battery cells (401b,..., 407b), the first transmitter device including a detection circuit to detect a charge condition of each of the first battery cells (401a,..., 407a) and the second transmitter device including a detection circuit to detect a charge condition of each of the second battery cells (401b,..., 407b), the first and second transmitter devices (100a, 100b) respectively including a transmitter circuit having an input side for applying a digital signal and an output side for generating an output signal in dependence on the digital signal, - a receiver circuit having an input side for receiving an input signal and having an output side for generating a reconstructed digital signal (PWM') in dependence on the input signal, - a transformer for inductive coupling the respective output side of the transmitter circuit of the first and second transmitter devices (100a, 100b) to the input side of the receiver circuit, wherein the output side of the transmitter circuit of the second transmitter device is coupled to the transformer by means of the first transmitter device, - a charging circuit to recharge the first battery cells (401a,..., 407a) and the second battery cells (401b,..., 407b), wherein the charging circuit is coupled to the receiver circuit, - wherein the first and second transmitter devices (100a, 100b) are operated in another voltage domain than the receiver device and the charging circuit, - wherein the respective detection circuit of the first and second transmitter devices (100a, 100b) is configured to generate the digital signal, when the respecitive detection circuit detects that the charge condition of one of the first battery cells (401a,..., 407a) and the second battery cells (401b,..., 407b) is below a threshold value, - wherein the respective transmitter circuit of the first and second transmitter devices (100a, 100b) is configured to generate the output signal in dependence on the digital signal.