Your best bet is to use L2 chargers when you go shopping. There are portable battery packs that can be used for the purpose you propose, but they're anything but cost effective and require you to use a mobile charger where you can limit the charge rate to ~1kW. It will take several trips/days to fully charge a PHEV battery that way.
I think it is the charging current, but not sure. Here is link to what the battery I bought on amazon.
I'm certain it is watt hours. Here is the unit that acts as the main artery in my electrical system -
https://www.amazon.com/MAXOAK-Portable-Generator-Emergency-Sinewave/dp/B07QZC1FV3
Looks like the lights are purchased in a set of 6. Each bulb is 15w, so it is a total of 90w for 1 set of 6 lights. Let me know if you meant 6 sets of lights, in which case it will be 540w.
Anyways, if you ran the 6 bulbs (90w) for 12 hours, then your total energy consumption is 1080wh (watt hours) for that day.
You will need a battery if you plan to use the lights at night. I highly recommend getting a battery even if you use the lights during the day. This battery should be capable of at least 1080wh. Here is a battery that has 1500wh.. Its not cheap.
This battery will allow you to run the 90w lights for about 16 hours. (1500wh/90w = 16.6 hours)
Solar panels can be plugged directly into this battery. If you got one 100w solar panel, it will take 15 hours of direct sunlight to fully charge this battery (1500wh/100w = 15 hours). Solar is pretty cheap compared to the battery, so its best to get a few of these, until you are comfortable with how long it will take to charge the battery. I would say at least 200w of solar power in this case, but more is better, especially if you live somewhere that doesn't get much sun. The battery was sized to power your lights for a bit more than 12 hours of absolutely no sunlight. If you got a smaller battery, it would charge faster with the same amount of solar panels, but might not be able to run the lights if you had more than 1 day of crappy cloudy weather.
I hope I didn't ramble too much or confuse you. I am not an expert, but I enjoy dabbling in solar power. Feel free to ask me more about this. I could even help figure out how long it would take for this system to basically pay for itself by offsetting the cost of just plugging into the grid and paying the man.
Oops... I meant Wh, not AH. A 1500 watt hour battery pack is integrated in my solar generator. I updated my above comment according. Sorry for the confusion.
Check out these kind of products:
https://mizine.de/gadgets/230v-akku-oder-wie-betreibt-man-ein-230v-gerat-mobil/
https://www.amazon.com/MAXOAK-Portable-Generator-Emergency-Sinewave/dp/B07QZC1FV3
https://www.businessinsider.com/best-portable-power-station
https://www.nytimes.com/wirecutter/reviews/best-portable-power-stations/
https://www.thedrive.com/reviews/33220/best-portable-power-station
https://www.goalzero.com/shop/archive-power/goal-zero-yeti-3000-lithium-portable-power-station-app/
Power Stations are usually available with Lithium-Ion or Lead-Acid. The latter being similar to a car battery.
Monitor your laptops' power consumption at the AC wall socket with a power meter Watt, then you can calculate how many hours a given Watthour rating might give you.
To save power, consider lowering your performance profile and use an FPS limiter if you're doing 3D graphics work.
// Tom
I've been looking at MAXOAK Bluetti.
https://www.amazon.com/MAXOAK-Portable-Generator-Emergency-Sinewave/dp/B07QZC1FV3
There are reviews on YouTube by people who use them for RV power generation.
I think going with a solar generator could be a good idea. You can charge it up on during the day from an outlet/car/solar panels. Im not sure if it capable of charging 10 scooters.
https://www.amazon.com/MAXOAK-Portable-Generator-Emergency-Sinewave/dp/B07QZC1FV3
https://inergytek.com/products/apex