Pre-Order Discussions

That is typically for 65/35 and The H62 brass is actually worse than that it has less copper so my guess is would be 25%.  Well good it got caught now. 

I've asked the manufacturer "how" (not "if") I can get the terminals in red copper.  We'll see what they say.

I do get a laugh out of people saying, "oh, power jack is going to copy your design, they're going to copy your design...!"

nope, not gonna happen.  They are beyond focused on bottom line cost.  And us at Genetry......basically aren't.  Our goal is to get the cheapest QUALITY parts (i.e. not ridiculous overpaying), and not focus on "the cheapest parts we can find."

I had a bit of back-and-forth between the factory about the caps we're using in the Genetry inverters.  Everyone else (including Aims, Sungold, Growatt, etc., etc.) uses a bunch of really tiny--and cheap--caps on the mainboard.  The problem is that they're looking to get "microfarads" as the only thing that matters.

It isn't.  What actually matters is getting the ESR down.  And unfortunately, the only way to get a very low ESR rating on a cap, is to get a physically very large one.  (This also significantly increases capacitor longevity due to increased ripple current rating.)

After I insisted on 4-5 lead 40x80mm caps, the factory priced them, and came back with a quotable quote, "those capacitor must be made of gold!"

Funny, very funny 😉.  Chance of seeing those caps in a Power Jack inverter from the factory?  Empirically 0%.

Yeah won't happen for sure.

The other side of it all is if they improve their inverters by learning what we want that is good for everybody.  They won't change it to be like GS, but we can hope that they will see what we want and may offer some very slight improvements.  Not really competing, but it would be a good feeling if someone out there purchased a PJ inverter that was slightly better because of this project.  I remember when Sean started talking to them and he suggested some little fixes and it seems like they actually did some of them. 

Most of China’s electronic products are all about quantity not quality. Like the power jacks and sun golds  inverters. Build as much as you can for the cheapest price. It’s not to say that China can’t build quality products it’s just that they don’t want to. 
True they can copy Sids design but they won’t because it’s too expensive and without the firmware it’s useless. What costs to make a quality product is not so much the materials but the R&D and time and testing of a product. Yes materials are a factor as well. If you put garbage parts into a project your going to get a garbage product in return no matter how much R&D time you put it.

Messaged the terminal manufacturer on Alibaba...and guess what:

"Hello sir, T2 copper is possible, how many do you want?"

Let's see where this goes.

If you get less than 1000 units your lucky. When it’s custom parts the norm is at least 1000 units. I am glad we caught this one before the final production run. Make sure everything is perfect before the production run.

T2 copper is going to be a lot better as per your design specs.

"Sir, unfortunately, we don't have this model in T2 copper currently, to customize it, at least 500 sets (1000 pieces in total) MOQ are needed."

Humph.

I don't have any other choices.

I'm pretty sure that PJ's battery terminals are steel / stainless steel.  Almost certain they aren't aluminum.

Like I said 1000 is the min magical number. I remember the days when the min order was 10k.

I can guarantee the ones that are on my PJ inverter are aluminum.  Mine though is a PJ 12V 8K with the 4 studs not sure if they put different ones in the different voltages.  May want to test yours.  A quick and dirty if you can't tell just by looking and filing a little off.  Another easy comparison is weigh them steel is a lot heavier.

I can guarantee the ones that are on my PJ inverter are aluminum.

I  striped the thread off two of the 4  battery terminals  by over tighten  on my PJ  inverter .    I  can use steel bolt if need  to  .     

8 hours ago, Carlos said:

Like I said 1000 is the min magical number. I remember the days when the min order was 10k.

We can't afford to buy 1,000 terminals just to get copper.  As I am not aware of any other options, the terminals will have to be brass.

1 hour ago, Sid Genetry Solar said:

the terminals will have to be brass

That's a bummer it will put a hard limit on the amount of continuous amps it can handle before the plastic housing of the terminals gets discolored/brittle and the heat cycling will cause the hardware to loosen as well.  What type of plastic is being used?

They have about 50% of the capacity of the aluminum PJ terminals before overheating.