Max/Min Operating DC Voltage of 48v

6 minutes ago, Cali Carlos said:

When you say no connection to the AC mains I assume you mean through the input correct?

I was a bit confusing...I was referring to charging via grid-tie-master inverter mode (grid-tie inverters backfeeding through the OUTPUT of the inverter and charging the batteries.)  As the inverter is providing an AC output signal for the grid-tie inverters, you definitely don't want a grid-tie mains breaker switched on--that would cause quite the problem.

8 minutes ago, Cali Carlos said:

For grid-tie master mode I assume I'd have the output wired into the AC main via a transfer switch or through a breaker directly on the main in which case the input would not be connected?

I definitely need to write a manual.  Another thing in the long list of things to do...

Let's put it this way: AC Mains can ONLY be connected to the INPUT of the inverter.  Connecting AC Mains to the OUTPUT of the inverter should in best case cause an error.  Worst case...it will blow the inverter up.

If however, the inverter is providing a "master signal" for grid-tie inverters to run (that are NOT connected to the grid), they would be connected to the OUTPUT of the inverter, backfeeding power that way, with the inverter also throttling them down as necessary (or if possible).

Sorry I misunderstood what you meant by mains. I thought you were referring to the main panel. Yes the main breaker that connects to the grid would need to be off otherwise a series of issues could result 

Double confusion, haha 😉

If there is no AC Mains in the picture, yes, the output of the inverter would connect to the "feed" of the breaker panel.

13 hours ago, kazetsukai said:

I'm curious to see what happens when AC power comes back as well, if you got that.

Here you go.  Purple is AC output.  Blue is AC input.  (Note that they're synchronized before the switch can take place.)

The noise on the blue is my fault...I don't have the output filter capacitors properly connected on my house inverter (haha!)  They will be properly connected on the GS inverters going out.

Also worth noting that this test was on a Rev. B GS board (which uses a different relay than the Rev A.1 in the first inverter shipment).  Shouldn't make much of a difference though.

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Sid, you keep bashing the A Gs :P.  Really making me wondering if I should wiat for the second or third batch lol. . .

I'll take the founders edition, at least I can push it and break it and send it back to sean for a year. . .  I'm bad at finding bugs with new toys.

Nothing wrong with the Rev. A.1 board--I simply had a Rev. B inverter on the test bench, and it was easier to use that than exchange it for a Rev A.1 test inverter.

Yeah, there's some upgrades and added functionality in the Rev. B board...but for most people, that won't mean anything.

8 hours ago, Sid Genetry Solar said:

Here you go.  Purple is AC output.  Blue is AC input.  (Note that they're synchronized before the switch can take place.)

Ah I see. Interesting.

By the way/unrelated, do you have a thread here detailing your setup and how you use it?

Not yet.  Maybe I should.

I did sorta briefly go over my system setup on a "Introduce Yourself" thread:

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