When you are at home you can plug in a laptop or some other appliance without having to worry about how much power it uses. You have nearly infinite power being piped into your home (hence your electric bill). At sea I have to generate my own power in order to run my computer, GPS, or anything for that matter. Since I lost all solar panels back by the equator in the Pacific it has been a challenge to keep enough power in my batteries. I had one advantage – I had saved fuel so in a pinch I could run my engine in idle to charge my batteries. I didn’t have enough fuel to use my engine for propulsion but I could still (once in a while) give my batteries a good charge. I still have about 5 gallons of diesel set aside for this purpose but it seems that my starter is dead. I can’t start my engine without a starter. I tried to start it manually but I have found it to be quite impossible as I don’t have a crank handle and my jury rigged handle couldn’t take the load and broke.