July 20th 2019
A squall had drifted over with with thunder, lots of wind and heavy rainfall. No sun, which was unfortunate because the last two days were also heavily overcast, so we were running a bit low on power. A dwindling battery capacity meant we couldn’t charge our devices. The batteries of our computers and tablets were already empty, so we couldn’t work anymore. It didn’t look like the sun would make an appearance today. The downside of being a digital nomad is that we need a computer or tablet and an internet connection for work, so we had to think of something else to recharge our batteries. Of course we could go back to the marina, but we didn’t want to go back anymore. If we go back we might never leave again once we’re safely moored in the Oosterhaven.
You might have heard the theory that if you run your engine for half an hour, your batteries are full again. Same with your car, if you have jump-started a car after a flat battery, you need to drive for a while to charge the batteries with the dynamo, otherwise you need to jump-start it again the next time. Apparently it also works with boats.
We decided to put the theory to the test. We started the engine and checked the charge level of our batteries so we could check the progress. After half an hour of running the engine we had only gained 3% more. Hmmm…it apparently takes longer than 30 minutes. We decided to leave it running for another half hour, and in the meantime made ourselves a delicious warm lunch with toasted pita breads stuffed with ham and cheese.
Suddenly we noticed that the landscape was moving. Since landmasses do not tend to wander around the obvious conclusion was that we were staring to drag. And quite severely, because the wind was blowing pretty hard. Luckily our engine was already running to intervene. We quickly went outside, hoisted the anchor, moved forward again and reset the anchor.
Glad that we were able to fix the problem so fast we went back indoors again and continued our lunch. But when we looked outside we noticed that we had started to drag again. And by now it was also raining a tantrum.
We quickly went outside again to reset the anchor in the howling wind. Totally drenched we returned inside, and could finally finish our lunch. It seemed like the anchor is holding this time. We had shut down the engine as well, because we didn’t want to risk dragging a third time. It hadn’t worked anyway. All in all this adventure had only generated 5% more power…
So what had we learned from this all?
1. Running the engine whilst stationary to charge batteries doesn’t really work. The yield is not worth the diesel and the noise.
2. Running the engine to charge batteries could dislocate your anchor and cause you to drag.
Our conclusion: Don’t charge batteries with your engine while at anchor.














