After 15 days at sea I would like to write a few lines about our energy and water supply. A city is not supplied, so we call our energy supplier the "Sissiwerke", a basic supplier with horrendous tariffs and poor service that does not even appear on one of the comparison portals. Unfortunately, we cannot switch to another electricity provider. So a few lines on energy production and consumption:
First, a little comparison. Of course he limps, he has to, otherwise he wouldn't be a comparison. Everyone knows a standard household light bulb with 60 watts. If we were to operate this on the Sissi, it would have a power consumption of 5 amps. So it would consume 5 ampere-hours (Ah) in one hour or 120 Ah in a day. Before departure, I measured the power consumption of the individual devices on the Sissi last winter and came up with a consumption of 144 Ah for a normal sailing day.
In the first 14 days at sea we generated a total of 1946 Ah electrical energy. With that, the mentioned light bulb could shine for at least 16 days. However, we consumed 2124 Ah of energy in the same period, so we were not completely energy self-sufficient. We have 540 Ah in the batteries, of which 50%, i.e. 270 Ah, can be used. From this the difference between the generated and the used energy is contributed.
A 350 watt wind generator is installed for our wind power. According to the manufacturer's data sheet, it delivers a maximum of 23 amperes, so theoretically it could generate 552 Ah every day. But it doesn't, the wind is never that strong. I have always been persuaded that a wind generator does not do much on the downwind courses that we always sail. I can only say that the wind generator is the most important pillar of the Sissi power supply, because it usually supplies electricity 24 hours a day. In total, we generated 920 Ah from wind power. For the first five days the wind was so weak that we could hardly sail. Accordingly, the wind generator generated only 165 Ah in the first five days. On normal days, it delivers around 80 to 100 Ah a day.
Our solar power comes from four panels with a total of 400 WP (watt peak), a theoretical value that corresponds to a peak power of 33 amperes. This peak performance is of course only achieved in the manufacturer's laboratory under optimal conditions. Not if the solar panels are not optimally aligned with the sun, covered with a salt crust and partially shadowed by sails, masts, trees, radar or clouds. The solar panels provided us with 832 Ah of electricity. You have to keep in mind that the time for solar power production is between 9 a.m. and 3 p.m. Not much comes before and after. If the solar system charges with 15 A, we are very satisfied.
Since we could not generate enough regenerative energy in the first five days, the engine had to be started on the fifth and sixth day. We have converted about 5 liters of diesel fuel into 194 Ah electrical energy.
What have we done with the energy? We operate the entire boat with the energy, i.e. the lighting, navigation computers and instruments, radar, refrigerator, waterworks and four smartphones, a tablet, two notebooks and the satellite phone.
Fridge (1008 Ah), electronic small animal zoo made up of smartphones and laptops (336 Ah), navigation (235 Ah), watermaker (160 Ah). The remaining 207 amp hours are shared by the pressurized water pump, ship lighting, coffee grinder and other electrical devices, such as the vacuum cleaner, which are not used every day.
From the 160 Ah electricity that our Watermaker used, we were able to produce 480 liters of the finest drinking water. We always keep the water tank full so that we can take a shower when we need it. Otherwise we drink the stuff by the liter, make our coffee and food with it and wash the dishes. Our water consumption is still very reasonable, because we only use about 11.5 liters of water per nose and day.
So what do we do if we have a hole in the wind power supply in the coming days? We turn off the fridge, but we still shower. The last foods that need cooling are used this evening. Then we only need it if we want cold drinks. Cola doesn't taste cold or warm, so it doesn't matter if the fridge is running. It only has to be switched on again on the last day, because we obviously need a cold feeder beer. The Sissiwerke will take care of that. By the way, the book that Jens reads in the photo uses 0 Ah.
15th time: 128 nm
12 o'clock position: N14 ° 09 ′ W52 ° 28 ′
419 nautical miles to Barbados, we have 1723 miles behind us.