New 10kw NHX AIO From Watts247
- Thread starter Kornbread
- Start date
What exact breakers are you using?
I'm deciding if I should have some in my PV leads or not. I have RSD boxes on the panels, and the Amensolar inverter has a built in disconnect, so I don't thin I need another disconnect legally, but wondering if it s good idea or not.
Mike C.
Art's Solar
New Member
Sorry, No, just my lisdexia.
Art's Solar
New Member
CHNT 20 amp, and an in-line fuse on the PV, a 200 amp Nader on the battery side.
Still looking at RSDs, haven't decided which one to get.
Thanks, Art
chtaixi 63amp. IIRC, this is the same cheap breaker @timselectric has been using without incident. They are breakers/fuses/disconnects outside on the pole mounts so these are probably not needed (@63amps to big to do good anyway) but it gives me a little piece of mind when something on the wall needs serviced.
Agnostic dyslexic insomniacs lie awake at night wondering if there really is a dog.
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?
Last edited:
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
Last edited:
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
