How to compensate tenants for no electricity in the building?

[Yulia J.]

We plan to update the electrical in our 3-flat building. We live in 1 unit and rent out the other 2. The electrical system here is old, so this is for safety and for better utilities separation.   Our electrician says we won't have electricity in the building for 4 days - until the village inspector gives his OK to get the electricity back.  How should we compensate the tenants for these days?