I have now completed mounting the Sanyo HIT-N235SE10 solar panel on the davits
The frame is welded from 35*20*2 mm rectangular aluminium tube. 35 mm is the same as the panel's height. The inside size of the frame is 5 mm larger than the outside size of the solar panel. The panel rests on the attachments for the davits
and the adjustment telescopes. The solar panel is secured to the frame by black kit at the top and the bottom. The frame has been anodized black.
The frame is attached to the davits with 5 mm thick L profiles 10 cm long, welded to the frame. Attachment is by 12 mm diameter 316L stainless steel
The frame is rotated using telescopic aluminium boathooks costing 9.95 euro. These have been shortened to the correct length. Determining the correct lengths of the inner and outer tube requires some mathematics.
I think these boat hooks are strong enough, as long as nobody is so @##%&!! stupid to lean on them in the middle. Adjustment is very easy.
Upper telescope pivot is plastic 10 mm, lower is 316L 10 mm, around 13-14 cm long. At the bottom side of the telescope, there is a short length of massive aluminium cylinder glued inside the 30 mm thin-walled tube.
If anybody wants to copy this system, I can make a description. Please ask only if you are serious, since describing this well is a lot of work.
I think that the system is strong, light (frame plus telescopes below 4 kg, panel 16 kg) and quite cheap
. It also looks slim since the frame is around the panel.
But it is a awful lot of work, don't count hours but count days.
I am still working on the right voltages of the solar controller. Since the Solar Boost has a temperature sensor, and the shore power charger
not yet, sometimes the solar controller charges to a higher voltage, sometimes the shore power
, depending on battery
temperature. Also the solar boost controller voltages are different from the specified voltages.
Next I will mount the bimini panel. I will do this comparable to Cotemar's method, but a bit more forward. This is to reduce the number of holes in the bimini cloth to 2.
Wires from the davits panel and the bimini panel go through an extra (red in the picture) wire duct. The bimini panel wires will go through the port chart-table cabinet and via a factory-installed duct to the engine
room. This latter duct carries standard only the Furuno GPS antenna
wire in it.
Now it has 5 extra wires: for the battery monitor
, for the AIS GPS antenna
which is mounted below deck
in the engine
room, 2 solar panel wires, and an extra NMEA
wire to get data from the autopilot's output to the navigation laptop
As you can see on the pictures, power production was pretty low with the gloomy winter weather