Electrifying my Seascape 18 – Part 2: Power Supply

Please find the scheme how I supplied my Seascape 18 with electrical power.

Main goal was to provide the Seascape with power independently from a fixed power grid installation and to have enough battery storage to supply the attached devices with power during one sailing day.

Scheme of the power-supply

Comments on some of the components I used:

  • The Raymarine Racemaster and the Wind Transducer have own solar cells and do not need any external power supply.
  • The battery Longex 12LCP-36 is mounted in the front tank under the front berth (I have a whole for an  inspection lid built into the tank where it just fits through if I take out the inspectin lid).
  • The NASA Supernova Combi Anchor / Top Light is a brilliant device! It is LED-based, has both the white Anchor Light as well as the three-coloured position light and can be supplied with power by a single cable (the included switch switches not only power on and off but can also change the polarity which chooses the respective colour scheme).

Mounting a chart-plotter on my Django 7.70

Additionally to the two Raymarine i70 multifunction-displays that came with my Django I wanted to install a chart plotter that would be accessible and visible from the cockpit.

I wanted to do the whole installation destruction-free – meaning I did not want to drill or saw any wholes into the boat structure.

Here is how I did it:

  • First of all I chose the Raymarine a78 chartplotter because of its sufficient size, the compatibility with my existing Seatalk NG network and because of the nice and new sailing features of the plotter.
  • Then I built a new front-cover for the instrument casing from water-proof plywood (paint it carefully so that it does not mold). The new front-cover allowed for the i70s to be further apart – so that the plotter can fit between them.
  •  By pulling a cable under the inner cover of the cabin-roof I provided the whole installation with power.
  • In order to connect the plotter to the Seatalk NG network in used the already existing cables for the i70s and simply fitted in another branch of cable via a T-piece on the main bus.
  • I made two brackets to hold the chartplotter and screwed them on the front cover.
  • Whenever I am not on board I take the chartplotter out and store it in the cabin.
  • Look at the pictures – they tell more than a thousand words…