โMar-27-2017 09:13 AM
โMar-29-2017 04:48 AM
โMar-29-2017 03:21 AM
Almot wrote:Words like "and" mean things. MC4s are only rated for 20A, and a 315W panel (24V) is going to put out about 10A, so he wouldn't parallel 3 such panels through one connector, he'd have 3 runs to the controller. But with 24 volt panels, he'd need to be running an MPPT controller to get 12 V out. So why would he parallel the panels in the first place? It would make more sense to run them in series, and have ~100V @ ~ 10A into the controller.
I recall, they are installing 3*315W in parallel. So - yeah, about tens of amps ๐
Almot wrote:Uh, what? TUV is the German equivalent of Underwriter's Labs (UL). It's not a protocol, and it's not affiliated with Amphenol in any way, other than that Amphenol may use their services, just as the Swiss Staubli might use UL services for products they want to sell in the US.
Yes, Amphenol headquarters are in the US. TUV protocol (of their H4 testing) is by Germans.
Almot wrote:A tool most certainly is required for disconnecting them. Since 2008, the NEC requires it, so that's how all the current connector manufacturers make them.
As said, no tools are required for disconnecting MC4 and its clones.
โMar-29-2017 12:43 AM
โMar-28-2017 06:12 PM
โMar-28-2017 03:03 PM
mike-s wrote:
For a large fixed system putting hundreds of volts and tens of amps through them, sure - stick to one brand.
โMar-28-2017 06:57 AM
howardwheeler wrote:If you are doing a rooftop permanent install you would not need connectors. Most panels have a junction box on the back which would give you access to a terminal strip. Remove the pigtail wires and hook direct to the terminal strip.
I've never hooked up solar panels before and now face two different connectors: T4 and MC4. Is one better than the other or more suitable for particular applications? And most important, do they plug into one another, in other words, can you have a mixed system where, for example, a T4 connector on a panel must mate to a MC4 connection on an extension cable?
โMar-28-2017 06:39 AM
โMar-28-2017 05:23 AM
โMar-28-2017 05:10 AM
โMar-28-2017 03:30 AM
โMar-27-2017 06:54 PM
โMar-27-2017 06:37 PM
โMar-27-2017 06:05 PM
โMar-27-2017 04:20 PM
howardwheeler wrote:
Is one better than the other or more suitable for particular applications?