Advice on my post apocalyptic story?

Basically, it's your story, your setting, so you can do whatever you want.

And yes, I'd say this is plausible- perhaps there aren't a huge number of working motors around for whatever reason, but one or two survived. The easiest way I can think of would be to have it so that petrol or electric motors were still common enough in your society, but since the catastrophe, most of the infrastructure is gone so neither fuel nor electricity are easy to come by. Both of these could be plausibly set up, probably petrol especially- if it's been 10 years, probably the bulk of the world's functioning oil supplies have been used, fought over, and/or destroyed in the process, and without refineries there wouldn't be much fuel left. So even if motors themselves are still around, fuel would still be expensive and rare.

The same could probably be said of electric motors as well; there aren't many batteries that are going to keep functioning at 10 years, and with few functioning electric generators left, or the fuel to use them, not much is going to be available there either. Solar cells would still work, but they'd be expensive and rare as well, as they aren't easy to make. Also you could make the argument that if everyone was all hooked into the power grid, very few people would still have had their own generators by that point.

Also keep in mind that it just needs to sound plausible. You don't need to do a full analysis of the number of generators that are likely to be available, extrapolated from current trends, or anything like that. Just say that electricity is now hard to come buy and most functioning equipment has broken down, been lost, or fought over.

Well, I think that you can do anything you want. It's your story. To believe any work of fiction readers have to suspend a certain amount of belief. So, I don't think it all has to make perfect sense. That is not what readers are looking for. I mean how do the conveyor belts work? They would have to have some kind of motor that drives them. You could have there be some problem with the world's oil supply and that would make cars unworkable. But cars can run on electric power. But some things I think you have to kind of skip over. Just give some kind of explanation that sounds plausible and move on.

Perhaps your apolyptic story is a projection of a Trump presidency. Perhaps it's the aftermath instead?

In the future solar panels will be more efficient, newer lighter stronger materials developed. E.g. Graphene's full potential realised. So a solar panel powered electric motor....why not?

Hey, I think it would be neat, if you (or your character) is techy, that they could find some material from some previous ages (like ancient artifacts from present day, pieces or motors, whatnot, sticking out of the sand or whatever) and used it to construct their own makeshift motor. Why not?

post poc has been done often recently you'l need to find a fresh spin