Where to buy a 3kW power supply?

Question

Electronics

There is a lift powered by batteries (4 pieces of 6 volts each). The plate says that you need 24 volts and 3kW.
Tired of suffering with batteries (one or the other) - I want to power it from a socket ( 220 volts ). With that in mind, 2 questions please:

1. Where to buy a suitable power supply? If you give a link to Ali - I will be very grateful!
   
2. What is the minimum wire size for the extension cord? The length of the wire will be 50-100 meters.
   

Answer 1

You most likely won't be able to do anything. Just because you have 3kW of nominal, and the starting one will be around 15kW (well, since this is a lift, then there is some kind of engine, and I think its starting ones are at least x3 of the nominal value). With this, the power supply will simply go into protection, as it will take it for a short circuit. I don't know of a single PSU that could give out at least x2 of its face value for a short time (not in the sense that they are not able to withstand it, they just consider it a "short" and cut off so as not to burn anything). The battery can easily produce starting currents of 400-600A.
Why don't you like the battery? Maybe it would be easier to just modify the design and that's it?
If the only thing annoying is carrying batteries, then just hang a charger on the battery and let it always charge it. So it is possible.

Answer 2

Minvels are available for high currents 125A, 200A and even 400A
www.mean-well.ru/store/RSP-3000-24
www.mean-well.ru/store/RST-10000-24

Answer 3

It would be cheaper and better to invite some kulibin to consider the possibility of changing the scheme with the replacement / rewinding of engines to 220/380. even for an ordinary household socket at 220 3.6 kW are the limit.
A power supply for such a power + a margin for starting currents will be a little cheaper than a Boeing wing
In general, just buy new batteries, yours have simply exhausted their resource, so they only last for a short time

Answer 4

good advice has already been given above,
you need a powerful transformer + power diodes, a la welding machine,
to minimize losses, you need to install it in close proximity to the consumer / hoist,

Answer 5

Well, here is the link to Ali:
https://ru.aliexpress.com/item/4000015904343.html