Giving an update on this situation ....
In the end I got someone privately to take a look at the electricity as the real estate agent just read the request message and never replied.
I also was able to contact the owner of the apartment via WhatsApp and he promised to send someone to look at the solar. This took 2 weeks before someone showed up.... and said he was there to fix the electricity. The communication with his only Turkish, my only English in person... assisted by someone who spoke limited English on WhatsApp continued for quite a few minutes and seemed more like a SCAM than anything else. I explained that there was nothing else wrong with the electricity and it was the solar.... he opened the fuse box, did absolutely nothing and the person on the phone told me to pay him 80TL and take it from the rent. More trying to get the solar fixed I again tried to explain the real issue... so he took a look at the internal water heater inside instead. Turned it on and tried to explain the water was working for heating. At this point I knew I wasn't getting anywhere so I just said ok so he could leave. Now magically the guy on WhatsApp said to pay the electrician 100TL and take it from the rent.
I managed to get the guys name and number and sent him a message directly telling him I'm not paying anything and especially without an invoice. He kept insisting to pay it and I don't need an invoice to the point that he realized I wasn't going to pay for "no work done", and eventually said he'll pay it himself and I just pay the rent as normal.
Subsequently contacted the owner of the apartment to see if he knew anything about this situation and he too read the message without reply.
Just amazing and a bit funny the lengths people will go to scam someone and avoid repairs.