Thread: Diy mppt?
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Old 07-18-10, 06:07 PM   #10
Xringer
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The panels are already in series. Almost 80 volts w/o a load. About 63 volts with a load.
I've got a fixed 10 ohm load (water heater) and I would like to hit it with as much voltage as possible (within reason).
And, the least amount of conversions done, is likely to be better.

IIRC, the voltage coming off the full-wave bridge of a PC PS is pretty high,
in 230 mode, they turn off the voltage doubling of the bridge.

Here you go.. Found it again.
200W ATX PC POWER SUPPLY
"C5 and C6 together for about 300V"

They had a very similar PS in the NEC 5500 series printers.
I was pointing out the unsafe location of the live terminals
to the printer engineer, telling him that the off-on switch
wasn't in the AC primary, leaving the exposed terminals hot,
when he reached in, and said "these aren't hot" and took hold of 300vdc.

That was a shocking experience, to say the least..
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