Agnostic dyslexic insomniacs lie awake at night wondering if there really is a dog.
Mike C.
New 10kw NHX AIO From Watts247
- Thread starter Kornbread
- Start date
Mike C.
Art's Solar
New Member
Currently trying to hook up the patch cord from Watts247, not having any luck with the two pin connector.
I do have some jst 4 pin laying around, that will be a more solid connection. just have to fire up the soldering iron.
that will be a project for tomorrow.
Thanks, Art
Note to self ... do not have 4/0 positive battery feed cable near uninsulated battery buss bar when stumbling around. Just about had to change shorts on that one. 
It is alive.
Is there a way to correct the voltage reading? It is off by .2v.
Can the temperature readings be changed from celsius to fahrenheit?
It is alive.
Is there a way to correct the voltage reading? It is off by .2v.
Can the temperature readings be changed from celsius to fahrenheit?
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Art's Solar
New Member
I have been looking at the same thing. can't find the setting for F and C. Also, my battery percentage is reading 894%.Note to self ... do not have 4/0 positive battery feed cable near uninsulated battery buss bar when stumbling around. Just about had to change shorts on that one.
It is alive.
Is there a way to correct the voltage reading? It is off by .2v.
Can the temperature readings be changed from celsius to fahrenheit?
I wouldn't worry about a couple of points on the voltage reading. We are talking about Solar Assistant, Right?
The nhx is the one with the .2v deviation. Haven't hooked SolarAssistant to the nhx yet. It would be really nice if @mciholas comes up with a better solution.
Somewhere I 'thought' there was a way to change c* to f* and correct voltage.
Rainy today and for most of this week, so it may be a while till I dare climb onto the metal porch roof and rewire those panels for higher voltage. Already had my 'oh $hit' moment for the week. Till then, both the growatt and a single nhx will be charging the battery bank. Fingers crossed, I'll get next weekend off, the weather will be nice, and I can get my 80yr old pops to come help lift the old 100lb growatt off the wall and stick the other nhx in its place.
Now I need to source another +500' of 10gauge. Only money, right?
42OhmsPA
What's in a title?
Do you have a preferred supplier?
Might as well spend it before it loses more value...
Been finding a few good deals on ebay. The last 500' roll of 10gauge was $90 shipped. Need a couple more deals like that to finish this project.
With the way prices of almost everything have skyrocketed, it will not take long to spend it!
42OhmsPA
What's in a title?
That's a great price.
Zoro has 500' for ~$140, I saw it when I was looking for 6awg earlier.
0.2 volts on 50 volts is 0.4 % error. That is pretty good given all the possible error sources in voltage measurement.
What are you using as "truth"? That may be off more than the inverter.
There could be a trim pot on the inverter to adjust it, though I consider that unlikely.
If it REALLY bothers you, one could trace out the circuit and find the voltage sense divider and tweak the resistor values to make it perfect. Even then, it might drift with time and temperature some amount.
I hope not.
Mike C.
Zwy
Emperor Of Solar
I bought six 500 foot rolls early this year from Menards at $129 with the 11% rebate to boot. Was in Menards the other day and saw THWN was $139 with 11% rebate it is $123.71.
Just crazy what copper has done over the years.
From SolarAssistant:
Thanks for taking the time to reach out, we are more than happy to advise or assist in any way we can. First, we do support Megarevo inverters as shown here. But it depends on the connection points available on the inverter and the RS485/232 pin configuration. Can you send us a screenshot from the manual that shows the RS communication port details so we can advise further?
@mciholas Here's the link SA sent. Looks like there may be two ways to hook up SA to this inverter. https://solar-assistant.io/help/megarevo/configuration
Thanks for taking the time to reach out, we are more than happy to advise or assist in any way we can. First, we do support Megarevo inverters as shown here. But it depends on the connection points available on the inverter and the RS485/232 pin configuration. Can you send us a screenshot from the manual that shows the RS communication port details so we can advise further?
@mciholas Here's the link SA sent. Looks like there may be two ways to hook up SA to this inverter. https://solar-assistant.io/help/megarevo/configuration
I see two steps, step 1 is the cable, step 2 is the config. I don't see two methods of connection.
Wats247 created this hack of a cable to bypass the external Wifi port, but that is still the same signals electrically.
I will report if the connectors I have ordered fit properly. If they do, that will negate the Watts247 hack and make for a much better experience overall.
Mike C.
Has there been a definitive answer on the grid pass through capabilities of the NHX-10kw? the 12kw Amensolar unit it is based on is capable of 200amp pass through, but I can't figure out if it is the same for the 10kw unit. Thanks.
Edit: According to a conversation with a reseller on AliBaba, the 10kw unit is rated for 100amp pass through. The 12kw isn't currently available
Edit: According to a conversation with a reseller on AliBaba, the 10kw unit is rated for 100amp pass through. The 12kw isn't currently available
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It really annoys me that critical limiting values like this are not in the documentation for the unit. All you got is some verbal or email to rely on, and that's from a reseller in China and not even the manufacturer.
Also, how are you going to get 100 amps to pass through with the load terminal block seemingly limited to 8 gauge?
I feel like one shouldn't ask from more current through this inverter than it can generate itself. Going to 100 amps versus 41.7 amp rating is asking a lot. Losses go up as the square of the current, so 100 amps is almost 6 times the losses and thus 6 times the heat in the circuits.
Mike C.
Thanks. I'm very new to this, so I appreciate the feedback. Just trying to get a better handle on things before deciding on any purchases. This will be my first solar setup, and I have a ton to learn
Zwy
Emperor Of Solar
It won't take anything bigger than 8 AWG?
I agree, the connections get hot too.
Gavin Stone
Solar Addict
All the terminals will allow 6 awg. And the grid input may even allow for 4awg. It’s a bit larger.
Make that a fine strand 6 as getting a regular 19strand Southwire thhn/thwn 8gauge was a complete bear. Ferrules might help get the 6gauge to fit. 10gauge will fit in the pv inputs without issue. Give me some time, and I'll try to get 4awg in the unmounted inverter grid input. I'd do it now but we have to prepare for the really krappy weather fixing to come through our area.
Even with 6gauge connected ... what size of wire/trace is inside the inverter? I've seen nothing more than 41amps mentioned in the manual.
@jh1982 you can download the manual here nhx manual
Even with 6gauge connected ... what size of wire/trace is inside the inverter? I've seen nothing more than 41amps mentioned in the manual.
@jh1982 you can download the manual here nhx manual
I
As a little background, my wife and I just purchased a house and will be moving in next month. The first big project I have in mind is a solar system with grid backup (at least initially, though hopefully fully off grid in the next few years). Initial plans are for around a 10kw solar array, 30kwh battery, and then the inverter is where it starts getting confusing. I'm debating between (2) EG4 6000 XP, this NHX-10kw, the SRNE 12kw HESP, (2) SRNE 10kw ASP like @420hmsPA will be running, or maybe the MPPLVX-12kw....though I'm pretty leery on that one. We will be grid connected, at least initially, but no plans to feedback into the grid. I do want the ability to be able to pass through enough grid power to run everything if needed, if power demands exceed inverter capabilities in rare situations. Been lurking here the last month or so and trying to learn as much as possible. Gavin and Will's videos have been a great help
Thank you. I've looked through that a few times and couldn't find anything specific for grid pass through/bypass. However, it is clearly listed as 200a in the spec sheet for the upcoming Amensolar 12kw split phase (see attached). Frustrating that there isn't any consistency in listing specifications. The EG4 18Kpv also appears to be capable of 200a bypass, so until the very valid point about wire gauge was mentioned, I didn't see 100a bypass for the NHX-10kw as too out of line. But as I said I am a total beginner so still missing a lot. Appreciate everyone's assistance.
As a little background, my wife and I just purchased a house and will be moving in next month. The first big project I have in mind is a solar system with grid backup (at least initially, though hopefully fully off grid in the next few years). Initial plans are for around a 10kw solar array, 30kwh battery, and then the inverter is where it starts getting confusing. I'm debating between (2) EG4 6000 XP, this NHX-10kw, the SRNE 12kw HESP, (2) SRNE 10kw ASP like @420hmsPA will be running, or maybe the MPPLVX-12kw....though I'm pretty leery on that one. We will be grid connected, at least initially, but no plans to feedback into the grid. I do want the ability to be able to pass through enough grid power to run everything if needed, if power demands exceed inverter capabilities in rare situations. Been lurking here the last month or so and trying to learn as much as possible. Gavin and Will's videos have been a great help
Attachments
The x12 looks way different than the nhx10k. I'd guess so are the insides.
A bit of lineage info on the nhx10. It appears the nhx10 is a rebadged amensolar n3h10k. The nhx I have has amensolar n3h on the sticker, although, I do not think amensolar is the manufacturer. With some validity, it has been stated that megarevo and the nhx10 (n3h10) are built by the same manu. As a lot of resellers of solar equipment like to source their wares from the cheapest manu, it would not surprise me if the nhx10k were manu by one supplier and other inverters in the line manu by another, but hey, the x10 and x12 look similar. Who knows?
Look up Will's video of the megarevo. Bug after bug. Not good. The strongest reasons I had for purchasing the nhx10 was Watts 'supposedly' working out any bugs with this never version and the reputation Watts247 has for customer service. He answered questions about another inverter and I had never bought a thing from his business. It is doubtful I would have taken a chance on ordering straight from China, or an unknown seller.
A bit of lineage info on the nhx10. It appears the nhx10 is a rebadged amensolar n3h10k. The nhx I have has amensolar n3h on the sticker, although, I do not think amensolar is the manufacturer. With some validity, it has been stated that megarevo and the nhx10 (n3h10) are built by the same manu. As a lot of resellers of solar equipment like to source their wares from the cheapest manu, it would not surprise me if the nhx10k were manu by one supplier and other inverters in the line manu by another, but hey, the x10 and x12 look similar. Who knows?
Look up Will's video of the megarevo. Bug after bug. Not good. The strongest reasons I had for purchasing the nhx10 was Watts 'supposedly' working out any bugs with this never version and the reputation Watts247 has for customer service. He answered questions about another inverter and I had never bought a thing from his business. It is doubtful I would have taken a chance on ordering straight from China, or an unknown seller.
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Yeah, I saw that one. Part of the reason the NHX10 and EG4 6000XP are at the top of my list, followed by the SRNE products. The 12k Amensolar sounds good on paper, but I'd like to see some real reviews first. You sound fairly pleased with your NHX10
It's only been up and running a few days, and it's only being used to charge batteries. If these storms leave us alone, plans are to get my 80yr old pops over here this weekend to help take the old growatt down and put the other nhx in its place on the wall. Two nhx in parallel. When the ct's come in (drat, ebay just canceled the order) I'll try backfeeding to the house but zero to the grid. That's when the real test begins.
The manual doesn't say if the ct ratio can be changed from the default 1000:1, but there is a place in the menu that looks to allow that. Anyone successfully changed the ct ratio?
Something to consider is that the terminals appear to be just DIN rail terminals and one could, in theory, just replace any of them with something better, say ones with screw terminals instead of springs, and with larger terminals that can take 6 gauge easily. The GRID terminals are larger than the LOAD terminals, and I surmise this is because you could be drawing from the GRID to power the LOAD entirely (no panel power, no battery power) *AND* at the same time be charging the battery at a high rate. So the GRID input has to deal with more current if you do that.
This suggests being careful with grid charging the battery. You probably want to set the current/power level for that modestly.
Mike C.
To be exact, the NHX10 *is* an Amensolar N3H-X10-US. The data label on the side will say so.
Denny Wu at Amensolar confirmed he supplies the inverters to Watts247. Whether he makes them or not is another question.
They seem to have Megarevo heritage. Same connector layout, same Wifi module and connector, same basic shape, etc. Whether that means this is made by the same people or is a knock off is unknown.
We shall see.
Amensolar will provide no support to end customers, they adamantly say to contact your reseller. If the reseller doesn't know, and the reseller can't get Amensolar to tell them something, then you are out of luck.
A case in point: it was clear Watts247 didn't have a source for the Wifi port connector which suggests Amnesolar didn't provide that info if they asked. So Watts247 made a hack RS485 adapter (for Solar Assistant) that goes direct to the inverter PCB. I had sent email to Amensolar asking about the connector, too, and was brushed off as well.
I think I've found the right one, but this is a case where the reseller is clearly not getting the kind of support one would hope for from Amensolar.
As to the bug fix thing, who knows. Watts247 has said there are still minor issues, so not all bugs have been fixed. How serious those bugs are remains to be seen.
Mike C.
