[chbot] Scrounging for big switch mode PSUs - clarifications

[Jasper Mackenzie]

I have a 3kw PSU you can borrow for a long while, have four of them. I use
two in series to charge my car batteries.
 ESP120 AKA HP3K
67V at 50A 8) adjustable of you know how 8)

On Fri, 8 Mar 2019, 3:41 PM Peter Harris, <petes.username at gmail.com> wrote:

> To clarify
> I am looking for mains powered DC supplies. The outputs must be floating
> to allow series connection.
>
> Re series connection and power.
> P = V x I so power rises in proportion to V
> A single supply delivering 20A at 50V yields 1000W
> 2 of these in series will deliver 20A at 100V or 2000W
> The 3 x 1000W 48V supplies in series will deliver 20.83A at 144V == 3kW
>
> Series connection of PSUs is fine provided their output isolation is
> sufficient to withstand the combined series voltage. Parallel connection is
> much more difficult but is not required here.
>
> "Caged" refers to the metalwork enclosing the electronics. Here are the
> unit's I'm considering
>
> https://www.aliexpress.com/item/Transformer-Switch-Mode-Power-Supply-DC-48V-3A-5A-7-5A-10A-15A-20A-150W-240W/32908080499.html?spm=a2g0s.13010208.99999999.265.1e3f3c002rOuom
>
> Thanks to all who have responded so far.
> I have been to Molten Media unfortunately they had nothing suitable.
> I had not considered a welder, I will do some research.
>
> I feel a talk at the next meeting coming on :)
>   P
>
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