hi guys!!  i have similar problem that jakaba but  with lower energy :-)

i have 5Kw solar power without power bank on-grid, i use normally 1kw-2kw with peaks to 5kw but only 1-10 minutes.
  
energy cost  22:00pm - 12:00am 0,06€ <-  night
                  12:00am - 22:00pm 0,14€ <- day


what kind of hardware interest me to use this 3kw only in solar mode.

i dont have any problem with noise hardware, i have a garden shed. 

many thanks!