I have solar on my house, and decided this winter to put it on the hardtop of my 390. I bought a 400Watt system from Renogy Solar. 4 100 watt panels and an MPPT 40Amp controller. I put 2 panels each in serial and then hooked into parallel This way if one bank goes down, then I will still have 1/2 system running. Elevator bolts were mounted to panels and then secured to the hardtop with 3M 4200. SOLID as ever. Used a hole saw (I needed a few drinks before drilling the hard top!) and made a 2” hole through the top to the middle. Then another by the port front of the hardtop. Fish taped the cables through and then drilled ANOTHER 1.5” hole into the trailing edge of the radar arch. Fed wires in and down to salon and through the chase behind the salon. I mounted the controller in the cubby where the central back is. Plenty of circulation of air. Wired into the house bank. I did place a disconnect switch between the input of solar panels and controller so it can be shut off if needed. fused on each side of the controller. More tedious than I anticipated, but looks like it will be totally worthwhile. Photos attached, and will report back as to how it functions as we got forward. Enough tools to build a house were out! LOL!!!