Extending 767 Powerhouse bluetooth range

I recently installed a 767 Powerhouse in the loft of my garage, which will be connected to solar panels above. However, my garage is separate from the house, and the bluetooth signal barely reaches. It is also a little bit of a pain to keep going up there. I would like to find a way to extend the bluetooth signal range (in theory, a bluetooth signal repeater) that would allow me to acquire the signal further into the house, to monitor its performance and control various aspects. Has anyone had success doing this? There are a number of allusions to such a thing on the internet, but nothing obvious that doesn’t require coding or special knowledge. Suggestions?