New 10kw NHX AIO From Watts247
- Thread starter Kornbread
- Start date
Osmethne
Solar Enthusiast
Eh. Just to have options. Hopefully the warranty process here is painless. I had a warranty claim with SGP a while back. If it were one easily identifiable component that failed I would have just replaced that component. The back and forth with SGP lasted about 4 months until it was finally resolved.
Just under 2 months of back and forth and they’re planning on sending me a replacement board. Probably could have come to this conclusion sooner, but finding the time to take photos and videos in-between work wasn’t easy lol. Not exactly sure what the part number is, but I’ll open it up and take a picture for them 
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Osmethne
Solar Enthusiast
So exchanging it with one from watt247 wasn't an option? That's disappointing to hear.
... but if I remember correctly, this was not sold from Watts and the unit was another brand (but basically same unit). Or am I confused with another member?
In a hurry to get the house's hvac wired up on loads1 and ran into a question.
The nhx does not bond ground/neutral for any output; generator, grid, load1, load2? Since I will not be running parallel with grid, the subpanel fed by load1 will now be considered the main panel, and if the nhx does not bond n/pe, then that panel will now have to be bonded.
The nhx does not bond ground/neutral for any output; generator, grid, load1, load2? Since I will not be running parallel with grid, the subpanel fed by load1 will now be considered the main panel, and if the nhx does not bond n/pe, then that panel will now have to be bonded.
Osmethne
Solar Enthusiast
I think so. Not positive though. I wired my system with that understanding.
Hmm ... since the grid main panel is still hooked to the nhx, I guess the ground/neutral bond could remain in the grid main panel even though it really won't be the the main panel anymore. The nhx should pass the neutral and ground along without switching the bonding, but I'd rather completely disconnect everything from the grid main panel. Maybe that would make the poco happy.
Gavin Stone
Solar Wizard
Correct. That should still supply your bond.
Turned off the breakers from the nhx's feeding the loads1 panel to add a circuit for the home hvac. Let the nhx's run to finish charging the battery bank while adding the circuit. Total time with subpanel feed breaker off ~1hr. Since each unit looks at the other unit's output for waveform sinc, how do I turn on both units (in parallel) so they don't basicallty create a dead short between units?
Answering myself ... how to turn on a pair of NHX in parallel @40.30.
Answering myself ... how to turn on a pair of NHX in parallel @40.30.
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Mission accomplished. Since the poco has become less solar friendly, loads are getting moved from grid to solar. First to go solar are the minisplits. They are not the cold rated ones and below roughly 30*, they start sucking power, but they should cool and heat for at least nine plus months out of the year. Summer time bills will tell the actual numbers, but expecting $50+ savings a month.
Still have to physically turn off some breakers and disconnect/connect some wires, but this also makes for a more convient 40a connection to backfeed the house when grid goes down for extended periods.
Depending on generation/usage, next to go solar is the well.
Still have to physically turn off some breakers and disconnect/connect some wires, but this also makes for a more convient 40a connection to backfeed the house when grid goes down for extended periods.
Depending on generation/usage, next to go solar is the well.
Osmethne
Solar Enthusiast
Less solar friendly? Are they sending the solar police after you for any amount of backfeed?
Never had a solar connection to the grid. Everything was in preparation to connect to grid, but they changed requirements, i.e.; have to pay for upgraded transformer+labor and keep liability insurance. Other requirements more or less similar as before, which were not solar friendly to start with. I'd never break even with the new requirements.
Yes, without the grid the NHX does not have a ground to neutral bond. If you have a load that needs a ground to neutral bond then you will need to make the bond at the panel fed by load 1.
Well…this is a diy forum
Also, the cost of shipping a board and shipping the NHX is a huge difference. I’m just glad they’re communicating and helping me fix it unlike some companies Got up this afternoon and was checking SolarAssistant ... nothing. SA, or the Pi it's running on crashes once in a while so I went out to the shed to reset it and everything was dark. ???
Both inverters were just sitting there, on, with no solar being produced, no power output, no breakers tripped, battery 53.xv, and no alarms. No indication of why the nhx were not doing their thing.
Reset rsds and everything came back to life.
No issues for a long time. I was getting used to dependable solar and this happens.
Anyone?
Both inverters were just sitting there, on, with no solar being produced, no power output, no breakers tripped, battery 53.xv, and no alarms. No indication of why the nhx were not doing their thing.
Reset rsds and everything came back to life.
No issues for a long time. I was getting used to dependable solar and this happens.
Anyone?
Osmethne
Solar Enthusiast
What version of firmware are you running?
Osmethne
Solar Enthusiast
Mine is this.
*Edit. Deleted it because I realized the serial number is in it.
*Edit. Deleted it because I realized the serial number is in it.
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Osmethne
Solar Enthusiast
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Wish they were a changelog for the firmware.
Something is up. Woke up and the led display on the minisplit was on. Since it's so bright, it's always set to off and only resets to on when there has been a power failure. Looked through SA and found nothing fishy. Boy reported hearing a beep from his unit from around 2-3pm. And there it is @14:40-14:42, another power failure. Short but there. Perfectly flat horizontal lines in a field of squiggles equals ac output is no more.
Again, no alarms on the nhx units. Whatever is happening, it appears the nhx reset themselves this time instead of completely shutting down.
xxx
Again, no alarms on the nhx units. Whatever is happening, it appears the nhx reset themselves this time instead of completely shutting down.
xxx
Osmethne
Solar Enthusiast
Did grid power go down?
I had a hiccup with this unit. It was months ago. I think the power from the grid went out for a short amount of time, like less than a minute. Instead of kicking in to power the critical subpanel the inverter either shutdown or power cycled.
It hasn't happened again but we also don't have very many grid failures. Maybe it's similar to what you've seen here.
I had a hiccup with this unit. It was months ago. I think the power from the grid went out for a short amount of time, like less than a minute. Instead of kicking in to power the critical subpanel the inverter either shutdown or power cycled.
It hasn't happened again but we also don't have very many grid failures. Maybe it's similar to what you've seen here.
Grid is not connected.
I'm wondering what would cause the units to stop ac output and/or reboot and not set an alarm?
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