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Ok, use it to charge batteries on an ac coupled inverter, what they call in the diagram “grid connected inverter “.

I also do not know what “smart load” actually does, need to read manual and see it it gives many clues. For us, the “dump load” is manually setting the mini splits to 62 when it’s hot and sunny and let the schedule set them back when sun starts setting- we spend most of daytime outside, it’s...

Not if you are off grid. In my personal experience, to be off grid year round and “Never” need to use a generator, you must have significantly more battery and PV than you need >90% of the time. Typically our batteries are at 100% before lunch, in mild weather it’s about an hour. If we were...

When grid goes down, home load side goes down also.

I believe this to be totally incorrect and indicates a misunderstanding of why the USA was once a industrial heavyweight but is no longer - reasons I say this: 1. Very few “working class” Chinese understand the value of their work and the goods they produce. For that reason they generally beat...

There are many exceptions, but for the most part I agree. On most things, I actually prefer to buy made in China.

Yes, he utterly destroyed General Electric, I lived thru the a good part of it. Unfortunately to this day he is still considered a “god” in the corporate world.

Nothing, bought only equipment

I’m not sure you could hear 52db through the cover and with the other stuff close that would tend to attenuate the sound, like he said, too bad he already put it back together…….

Any chance you have a picture good enough to see a nameplate or label with a number on it or something?

With it buried inside, I’m not sure it would be possible for it to hear it.

So, what do y’all think of the fact that Growatt advertises that the inverter cooling is “natural convection “? The datasheet clearly states that, now @lapsmith finds a fan inside. @1201 @BKY2003

Can you identify in one of your pictures where fan is at? Unless what @1201 identified is a fan

If it has a fan, I’ll be getting my $ back on all four of the ones I have, 2 V1 and 2 V2. I believe if there were a fan it would be evident in the pictures he has sent.

Do you know the purpose of the coils in the heat sink? What do they do?

What is the 3rd picture? And what are the wires going to thru the slot?

Thanks! I have another 2 picture requests: 1. I searched your posts and have found where you uploaded closeup photos of parts of the main control board, but not one that shows the whole thing in one picture, could you up load a picture of each side of the board? 2. Can you upload a picture...

@lapsmith So, the main circuit board must be mounted to the heat sink?

I’d say they did it intentionally.

Mine came with a power supply that plugs into 120 ac. Some people have power directly from dc battery power though - there are multiple treads discussing that somewhere on the forum

Yes

The simple fact of the matter is, either pay the utility what they require, or make your own electricity and cut the cord - that’s why very few restaurants charge a membership fee, there are those that do though.

We learn by collaborating - each of us takes turns climbing up on the other’s shoulders and we all get taller each time. I’d really like to have some pictures of the sealed “shell” of the V3 inverter you took the circuit boards out of

Where are they made?

There is a battery on the card, I assume a wake-up pulse is sent over the communication cable to the battery, see table from manual below. If a person knew the voltage it could probably be done many ways. Now I’m wondering if perhaps the reason there is no button like the one on eBay has...

I believe the ac couple limit for “any” Growatt would be less than or equal to the output capability of the Growatt grid forming inverter. Give the Growatt white paper I link below a read. It for the SPF but I believe it is applicable to all Growatt ac couple capable inverters- I have found...

Just tested it, the black start button on the battery wakes up the battery and applies power to the battery input of the inverter and the inverter powers up. Additionally, my inverters do not have the black start button on the back for some reason (will contact Growatt about that at some point)...

Hey @lapsmith , you have generator connection right? Make sure the PV switch is turned off (so if PV does start you won’t reverse power generator later), start generator with connection to the inverter gridtied output with breaker shut, inverter will power on. Then the LG battery will wake up...

Thanks, it's got to be a V1 because the nameplate says it only does 5,000 watts backup power. V2 & V3 do 11,400 watts backup power as listed on nameplate. Question: when did you purchase from signature Solar? They have stated that they have sold nothing but V3 inverters since September of...

If I were you I would set it up somewhere very temporarily and wire a small string of panels to it (even if have to lay them on the ground) make sure the backup output works and maybe even connect 240 to it. Make sure the important stuff works. You will probably learn a couple of things that...

I’d appreciate it if you could post a pic or two of the sealed portion of the inverter with the circuit board(s) taken out the way you have it now. I’d just like to see how the inside is laid out and get idea of what the wiring layout that goes from bottom to top looks like. I have 2 spare...

045 would definitely be the data logger. The reason I’m asking is the part numbers you listed did not exist a year ago, which means either you are looking at the wrong number or the part numbers have changed, which would mean the capability of the inverter changed probably. Any chance you...

Are those data logger or inverter part numbers? They are right next to each other on the label, on mine anyway,

No, the PV01 is meaningless as to what version they are. See attached part number cross reference.

I have a couple of questions about your system: 1). I don’t see a power meter connected to any of your inverters- but the pic may not be high enough resolution to tell, I’m assuming there are no power meters? 2). I’m assuming you are using them with all 4 gridtied, as opposed to ac coupled to a...