Until now we visited three groups of islands, Los Testigos, La Blanquia and Los Roques. We stopped in the first group only to spend the night before moving on. The place was pretty but we wanted to keep going. At La Blanquia we stopped only for the day and left the same night toward Los Roques. Over there it is the real vacations. Its almost white sand beaches and its inhabited islands make of Los Roques a vacation place that the Venezuelans and other tourists take advantage plenty and we are no exceptions. Yesterday we stopped at an Island where only one other boat was anchored. In front of us laid a long sand beach and on our side, at about 300fts, was a large coral reef. We decided to take the day to relax while finishing the last shade cover that we are making to keep the cockpit cool. We first started in the morning by installing the rails on which the shade attaches and then we put on our masks and fins and swam to the beach about 450fts from the boat. Danielle thought that we do not exercise enough so she left at good speed and swam all the way to the beach with me dragging behind. Swimming 450fts even with fins is not obvious when we spend most of our time on a 40ft boat! I really miss my Tae Kwon Do classes! After taking some sand on the beach for our collection we swam to the coral reef and spent about an hour in the middle of multicolor fishes, which for the most part don’t seem to be bothered by our presence. Danielle would like to be able to touch the small silver fishes swimming in a school of a few thousands but they are not really the affectionate type and are very good at avoiding her hand in a synchronized dance. Once back on the boat we ate and then resume our work on the shade until we were again too hot and jumped in the water again. We returned to the different kind of parrot fishes, the school of purple fishes that I forgot the name and all the other ones as colorful as the next one. Those snorkeling sessions are really fun. A coral reef can easily host 20 to 50 different species of fish and shellfish not to mention the coral itself. It is easy to spend one or two hours swimming in the middle of this natural fish tank without getting bored. Finally we finished the shade just after a flamboyant red sunset and finished the day with a good bottle of wine.
If you like the technical stuff here’s a detailed description of the project in question. Before, we had four Siemens 75W solar panels for a total power of 300W and a conventional charge controller Trace-40C. We added 2 new 130W Kyocera solar panels and two 65W panels for a total additional power of 390W, which gives us a total nominal power of 690W. Our existing controller had a problem and I preferred to change it. Also I couldn’t connect the old panels in parallel with the new ones on the same unit so I needed two units in parallel, one for each group of panels. I chose the controller “Solar Boost 50” from Blue Sky, which is more expensive but also boosts the current by 20% by lowering the 17V voltage of the panels down to about 14V to the batteries. With the 20% boost this gives us the equivalent of 830W of solar panel with a conventional controller! I also changed the wires for the old panels in order to reduce the power dissipation in the old undersized wires. Even by bringing the controllers as close as possible to the batteries the run between the solar panels and the batteries is still over 60fts hence a total distance of 120fts since the current must go back through the negative wire. For this I used AWG-6 gauge, 7 strands zinc platted copper wire guarantying less than 3% of power loss. Practically, we get between 35A and 40A of charging current for most of the day. I haven’t measured the total charge we get but based on my estimate I’d say it is between 200 and 250 Amp-hour per day.