A computer-implemented method of public opinion poll initiation and public opinion data collection for using non-deterministic mathematical models, independent of third parties involvement is provided. In one aspect, in order to provide an inverter which can be repaired more quickly and more reliably at the location of use, an inverter is of an at least partially modular structure, with releasably installed modules and connecting lines releasably mounted to the modules. A switched capacitor circuit is used instead of the more conventional resistor combination to supply a scaled representation of the battery voltage. Processing of the interrupt can be executed by the one load module even during rebooting of the operating system.