Roof snow load monitoring device, having: a main balance unit, comprising: a main balance platform having a main balance platform surface, a main balance weight sensor which is connected to the main balance platform and by which an electrical main balance weight signal can be generated which is associated with a weight present on the main balance platform, an electronic main control and communication device connected to the main balance weight sensor to receive the main balance weight signal, and a main balance battery which is connected to the main balance weight sensor and the electronic main control and communication device to supply these with electrical energy, a plurality of secondary balance units, each comprising: a secondary balance platform having a secondary balance platform surface, a secondary balance weight sensor connected to the secondary balance platform and by which an electrical secondary balance weight signal is generable, which is associated with a weight present on the secondary balance platform, an electronic secondary control and communication device which is connected to the secondary balance weight sensor to receive the secondary balance weight signal and by which the secondary balance weight signal is transmittable, preferably wirelessly, to the main control and communication device, and a secondary balance battery, which is connected to the secondary balance weight sensor and to the electronic secondary control and communication device in order to supply these with electrical energy, wherein the main control and communication device is configured such that an information and/or warning signal can be generated by it as a function of the received main balance and secondary balance weight signals and is transmittable, preferably wirelessly, to at least one receiving station in order to there be detectable by a user, wherein the secondary balance platform surface of the respective secondary balance platform is smaller than the main balance platform surface of the main balance platform, optionally by at least 30%, further optionally by at least 50% smaller. a main balance unit, comprising: a main balance platform having a main balance platform surface, a main balance weight sensor which is connected to the main balance platform and by which an electrical main balance weight signal can be generated which is associated with a weight present on the main balance platform, an electronic main control and communication device connected to the main balance weight sensor to receive the main balance weight signal, and a main balance battery which is connected to the main balance weight sensor and the electronic main control and communication device to supply these with electrical energy, a main balance platform having a main balance platform surface, a main balance weight sensor which is connected to the main balance platform and by which an electrical main balance weight signal can be generated which is associated with a weight present on the main balance platform, an electronic main control and communication device connected to the main balance weight sensor to receive the main balance weight signal, and a main balance battery which is connected to the main balance weight sensor and the electronic main control and communication device to supply these with electrical energy, a plurality of secondary balance units, each comprising: a secondary balance platform having a secondary balance platform surface, a secondary balance weight sensor connected to the secondary balance platform and by which an electrical secondary balance weight signal is generable, which is associated with a weight present on the secondary balance platform, an electronic secondary control and communication device which is connected to the secondary balance weight sensor to receive the secondary balance weight signal and by which the secondary balance weight signal is transmittable, preferably wirelessly, to the main control and communication device, and a secondary balance battery, which is connected to the secondary balance weight sensor and to the electronic secondary control and communication device in order to supply these with electrical energy, a secondary balance platform having a secondary balance platform surface, a secondary balance weight sensor connected to the secondary balance platform and by which an electrical secondary balance weight signal is generable, which is associated with a weight present on the secondary balance platform, an electronic secondary control and communication device which is connected to the secondary balance weight sensor to receive the secondary balance weight signal and by which the secondary balance weight signal is transmittable, preferably wirelessly, to the main control and communication device, and a secondary balance battery, which is connected to the secondary balance weight sensor and to the electronic secondary control and communication device in order to supply these with electrical energy, wherein the main control and communication device is configured such that an information and/or warning signal can be generated by it as a function of the received main balance and secondary balance weight signals and is transmittable, preferably wirelessly, to at least one receiving station in order to there be detectable by a user, wherein the secondary balance platform surface of the respective secondary balance platform is smaller than the main balance platform surface of the main balance platform, optionally by at least 30%, further optionally by at least 50% smaller.