Hi there,

I am a private individual, we have installed at our premises a Siemens electrical meter S2BS-100. The meter appeared to measure correctly until we installed a 6 Kw solar PV system last month (Nov 2022). We have exported half of the generated electricity, and we were expecting to have spent less electricity than before November, however we noticed that the imported or used electricity went up 30% more, a lot more than expected especially with the electricity we have exported from the solar panels.

For that reason, we are suspecting that this meter is measuring and adding our exported electricity as net used electricity.

Can someone with technical knowledge about this unit help us out to understand how this meter operates and how the meter measures exported electricity?

We have tried to find the instruction manual for this specific unit but unsuccessfully.

Can anyone help?

Your meter might be miscounting exported power as imported, some models do. Best to check settings or contact Siemens before you plant sumo effort into fixing it.