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Safety while connecting HV Solar String
#11
(06-03-2019, 04:28 AM)Maniac_Powerwall Wrote: Oh, I do understand the danger of 250V. This is why I am asking. What still confuses me is the way the solar panels work. This no load, no current thing is still strange for me...

But these were the things I wanted to know. I did know that you can do it in the night or put some blankets over. But never seen anyone doing it. So I wanted to know how it is done in real World.
It's not unlike a battery just sitting there, eg the +ve & -ve terminals....  there's voltage present but no current flows until you connect some type of load to it.
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#12
As far as for in the real world from what i have seen on various construction sites(in the Netherlands), they all work with connectors.
First connector on, then they place them on the roof.
The connectors have also some protection, sort of a "condom" (sorry dont know the correct word for it) over the connector.
Or they come with a small inverter and they assemble the inverter first, but always with connectors.

Be safe
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#13
(06-03-2019, 04:49 AM)Geek Wrote: Also this is 250v DC we are talking about here. 240v AC hurts, it might kill you, it may make you jump up and down. 250v DC will grab you and kill you dead!

DC is more dangerous than AC??
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#14
(07-01-2019, 08:08 PM)bigmac5753 Wrote:
(06-03-2019, 04:49 AM)Geek Wrote: Also this is 250v DC we are talking about here. 240v AC hurts, it might kill you, it may make you jump up and down. 250v DC will grab you and kill you dead!

DC is more dangerous than AC??

Most definitely! AC will knock you off if high enough voltage. DC will make you fully latch on and turn you into a crispy critter. I accidentally made contact at 240V in my mains panel (not me physically, but with a screwdriver; yes, dump, i was also much younger). I was actually pushed back away from the panel. Not much, but still.
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#15
(07-01-2019, 08:08 PM)bigmac5753 Wrote:
(06-03-2019, 04:49 AM)Geek Wrote: Also this is 250v DC we are talking about here. 240v AC hurts, it might kill you, it may make you jump up and down. 250v DC will grab you and kill you dead!

DC is more dangerous than AC??

Yes, far more dangerous.  The biological effects have been mentioned.  Also arcing is a much bigger hazard.
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