Here is one of my ideas for when my Kepler Bb civilization gets higher level technology. It is Solar Powered Transportation.
Now I know what you are probably thinking. You are probably thinking that there is no way solar power is going to be enough to sustain it. And you would be right if you are talking about earth but on Kepler Bb there is approximately 4x as much sunlight(that is an overstatement though, they do have 4 stars but 4 stars does not equal 4 sun-like stars and 4 sun-like stars does not equal 4x as much light as 1 sun-like star)
Anyway, there is more sunlight on Kepler Bb than on Earth and more opportunity to gather that sunlight in the form of electricity for 2 reasons:
1) There are 3 more stars than we have supplying light and heat
2) Every time unit except the second is lengthened but names are kept the same for simplification and to make it even simpler, I kept the ratios of daytime to nighttime for any given latitude the same as ours.
When the people on Kepler Bb get high enough on the technology ladder(I kind of view it as a ladder from ancient technology(simple bow and arrow, baskets, etc.) to modern and postmodern technology(calculator, solar power, hydraulic machines, etc.) with some overlap along a timeline(in the case of Kepler Bb, considerable overlap(communicators are developed long before lightbulbs and solar power grids)) 1 milestone towards modern and postmodern will be these solar powered vehicles.
Now you might wonder how I got the idea for solar powered vehicles in the first place. Well here is how I got the idea:
"Gas engines pollute the air so much, so I don't want gas, even biogas is a no-no." This was the first step to getting my idea, taking pollution out of the equation.
"Electrolytic engines waste water, Even if a combustion unit is added to form water again, it will still have been wasted." This was the second step, not allowing the wasting of water.
"Solar power is perfect, No water wasting, no pollution, 100% electric, Yes!" This is the result. Solar powered vehicles and in fact, everything powered by renewable sources(hopefully 100% solar or 50/50 Solar and Wind(Not sure about Water power and Geothermal energy is already used as a natural heat source in the cold months))
So here are some images of what would result:
The battery here powering everything else is rechargeable. In fact all the batteries I will be showing are rechargeable. The plug is for recharging the battery. A plug protector is built into every plug when the vehicle is made and you have to pull the protector out of the plug but not off the vehicle in order to recharge the battery. The reason there is a plug protector is so that water does not get in and mess with the electronics.
That is for the vehicles. Now as for recharging, it can happen(and most likely will happen) at home. The battery gauge would look somewhat like this:
This is a picture of a rechargeable battery gauge. It is basically a voltmeter in constant use. The lower the voltage, the shorter the amount of time before the battery goes dead and needs recharged ASAP. Of course it isn't just use that can lower the voltage but in a battery, that is the most common cause.
I was thinking for recharging there should be Solar Charging Stations in cities and rest areas between cities.
Solar Charging Stations would look a lot like gas stations except instead of nozzles, there are cords to plug in and instead of gas that has to be delivered every X weeks or whatever, there are solar panels that lead to solar batteries that are throughout the daytime, supplied with electricity, The solar batteries in the vehicles on the other hand are not constantly supplied with electricity. Instead they are only supplied with electricity when they need recharged(Kind of like my phone battery but much bigger).
So what do you think of this solar power idea? Anything I can change to make it better but still solar with no pollution or wasted water?
And what if the solar battery is dead and the humanoid driving the vehicle isn't anywhere near a solar charging station? For motorcycles it isn't much of a problem because they are light enough vehicles for the humanoid to carry, even a long distance without injury. But a truck driver probably couldn't even push the truck forward with all his/her strength so he/she would literally be stuck on the road. There has to be a backup system for these drivers so that they don't get stuck on the road because of their battery but what backup system?