The main power [electricity] would be generated from photovoltaic systems, or in other words solar energy. These don’t produce anything other than electrical power, and can work anywhere a star shines.  Photo means light, and voltaic means electricity, so a photovoltaic system is where sunlight is directly changed into electricity.
            These solar panels for receiving energy from the 20-21st century was made out of single crystal or monocrystalline wafers, which have an efficiency of 13-14%, while each cell would be highly expensive. Semiconductors, which are made, out of silicon, and if it interacts with light [photons] and it releases free electrons, which become electricity in a flow. But we might use Gallium Arsenide [GaAs], for the semiconductor, because of its high efficiency [up to 30%], and since it has an extremely high absorption power, we would only need to have a very thin layer, and could withstand radiation. And since the use of silicon would make the production of these solar cells highly expensive, and silicon purification is a very hard process and wastes a lot of material, Gallium Arsenide would be highly suggested.
Since Jupiter’s Ganymede is far away from the sun, we would have mirrors (solar ovens) to concentrate the light and heat, and use the heat to heat the boiler, and the vapor will convert the thermal energy in to kinetic, then to electric power.
            Other than having orbiting power stations, we will have power stations orbiting around the sun. We would also have power plants orbiting near the sun. We would store the photovoltaic energy in fuel cells, and we will use large mirrors to concentrate the immense heat. This will be just like the ones orbiting Destino Magnus, except for the fact it uses radiation to power up as well. The radiation will create power, by ionizing gas. The powerful radiation will break apart the atoms/molecules of the gas, creating independent electrons and nuclei/particles that engage the radioactive substances later on. The electrons and /nuclei/particles will be concentrated into a laser, hitting the radioactive substances. It will soon decay, and release energy. Just to remind you, this isn't the only energy source for the pod. Solar energy will also be stored. This pod, called the H-RPPG [Hybrid-Radiation-Photovoltaic Power Generator], first travels to close to the sun or Mercury/Venus by ion engines. But on the way back, it uses a solar sail to come back to Destino Magnus. There will be three solar sails installed in H-RPPG, since the solar sails may become defective if the H-RPPG chooses a wrong route, and is damaged from tiny particles of dust. It could also rip apart during installation and use, if there are any mismatches in the times of getting it out for use, or from unexpected solar flares that could bend the solar sails in an uncomfortable way, making it also defective. Since it is practically impossible and dumb to control H-RPPG by commands from Destino Magnus, we will have H-RPPG think on its own. It will tilt its solar sail and the ion engine to change their roads. Five radiation-durable cameras will be implanted on the H-RPPG, and automatically calculates and decides its own voyage back and forth from the sun to Destino Magnus.
For pods that mine material out of asteroids or collect gas from other planets, it would require its own way of generating energy. Since it could travel to farther places with low amount of sunlight, it would require an alternative.  As used in the Cassini probe, RTGs [Radioisotope Thermoelectric Generators] would be mainly used. It is a way to create electricity by using radioactive decay, and its heat.  That is why its name has “thermoelectric”. It would have materials such as Plutonium 238in a small capsule surrounded by thermoelectric generators, with a radiator on the outside. When radioactive decay occurs, and when the Plutonium reaches a higher temperature than the radiator, the difference in temperature makes a flow in the thermoelectric material, thus creating electricity. The half-life of the fuel [in this case Plutonium 238] needs to be long enough in order to create enough energy.  Although its efficiency is fairly low, it is highly reliable. Instead of RTGs, we could use SRGs [Stirling Radioisotope Generator].
All solar energy will be stored for small places in the station, as well as emergency power. The solar energy will be stored as well.

Power Generation In Everyday Life
Inside the station, we have light as a part of our life support environment. Instead of just using it so we aren’t blind, can’t we also recycle it as well? There will be solar panels camouflaged in the environment. On Raumtragers, other vehicles, stores, houses, and sometimes trees, and even the floors. We can never waste power. And we always want to recycle. The camouflaged solar panels are called life-lights, and some are heat generated electric converters. So if you touch your fork while eating spaghetti, the tips of the fork will heat up, so it doesn’t cool down the spaghetti you’ve been waiting to eat. Even at offices, hand rests; seats, and floors, keyboards will be having HGEC [Heat Generated Electric Converters] that support lighting systems, and screen lighting, et cetera. Having power generators around you could be power saving, and cool. At recreation centers and training centers, the wheels and the bicycles will generate power as well. You stay fit by using fat, and you make power. Simple as that!

Nuclear Energy
Nuclear power is also an alternative for the settlement to supply energy.  Nuclear power plants create power from energy released from the nucleus of an atom, usually the ones that are radioactive and usually in an unstable state. But this is fission, which is where you bombard the nucleus with a single neutron at the right energy state or velocity. From this “attack”, the nucleus then splits into lower elements, while releasing more free neutrons. If there were to be immense amount of this nucleus’ of an atom, usually Uranium 238, Cobalt, Plutonium et cetera, by using one neutron, a devastating amount of gamma rays would be released and turned into energy. But since this is very unstable and many controls of fission must be at place, nuclear fission would be amore safer and reliable source of nuclear power for a space settlement. Nuclear fission is almost the complete opposite of nuclear fission, it combines nucleuses. It is when two nuclei join together usually lighter than iron, and its binding energy [from the strong nuclear force] is the power. For example, the deuterium-tritium fusion is considered most reliable, where you combine deuterium [H2] and tritium [H3] combine when they get close enough [strong nuclear force gets activated] and turn into Helium [He4] with 3.5 MeV, and a neutron with 14.1 MeV.

Cold Fusion
In order to create such an environment for nuclear fusion, we need heat. Lots and lots of it. In order to create that heat, solar ovens are not enough at all. We’d need Mr. Fission to create such an environment, and then it would be useless to have a nuclear fusion power generator. But there’s hope. Cold Fusion. Cold Fusion is where nuclear fusion is caused at room temperature. Cold fusion requires less heat to be generated for the generator, and only makes small amounts of radioactive waste that will undergo decontamination and be recycled or excreted from the system. Nuclear fusion using deuterium will create large amounts of energy, and is our great source of energy. Cold Fusion is our way of creating god-like power for the settlement.

Power Distribution
Power will be distributed around the settlement using large copper cables to have minimum resistance. The copper cables will be used for short distances from power stations to close houses, and power generation in life. For long distance distribution, instead of copper cables, we are using superconductors, which allow electrons to lollygag freely, with no resistance. 
Power Storage
Since we aren’t going to use solar power directly for most of the time, the power will be stored in batteries. Nickel-Cadmium batteries are a way to store energy for the H-RPPG as well as inside the settlement. But Superconducting magnetic energy storage is better than ever. Superconducting magnetic energy storage [SMES] stores power in a magnetic filed made by the current in a superconducting cooled to a temperature below superconducting critical temperature. The coil, power conditioning system, and the refrigerator. Once the coil is charged, the current will never decay, and can be stored almost for an eternity. Discharging the coil can use the stored energy. Time delay from charge and discharge is short. Power available instantly. Since SMES can only give a fairly small amount of energy and cryogenic temperatures are hard to reach, these will most likely to be used for emergency.
Fuel Cells are an electrochemical device, and can be reused. It makes electricity from a supply of hydrogen and oxygen, which could be easily swallowed from Jupiter. A fuel cell converts hydrogen and oxygen into water, and the power is made during that process. Fuel Cells have DC voltage, so you can uses it for powering lights, motors, et cetera. The ones we are using is the Proton Exchange Membrane Fuel Cell [PEMFC], and can power cars, buses, and much more. The anode [negative post] conducts electrons from the hydrogen to be used in another circuit. There are many channels on it so the hydrogen can be equally spread. The cathode is the positive post, and distributes oxygen, and lets electrons pass to the catalyst, where the hydrogen ions and oxygen combine to create water. Surrounded by the catalyst, the proton exchange membrane, conducting the positive ions, and blocking electrons. The catalyst is the material that makes the chemical reaction of the hydrogen and oxygen. They can operate at a low temperature of about 80 degrees Celsius, so it doesn’t require large external heaters.