Dave911
Solar Enthusiast
Fwiw, THHN is tested, during production, at way over 1000 vdc. So 600 vdc, no big deal.
Midnite Solar Announced their new 10kw AIO at Intersolar Today
- Thread starter HighTechLab
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KevinC_63559
New Member
Agreed, but can see the flexibility having over 450V that I believe Victron maxes out at?
Brucey
Solar Wizard
There's a soft limit of eight times the float voltage of the battery, so around 432V with a float of 54V.
Just like battery voltage of 12-24-48V, as you go higher on PV voltage, you see uses for even higher voltage. Yes, I know the higher the voltage, the more dangerous it gets. But man it's handy running a string of 12 (or 14) 450 or 550w panels..... now if you can run 2P on your PV, you just double up. But for AIOs or other mppts with only 16A input you can run into limitations!
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Brucey
Solar Wizard
So looks like NEC 2020 limits to 600V on or in a one or two family dwelling, commercials good up to 1000V but if you have a powerhouse/accessory structure for the equipment and ground mounts looks like we are good to 1500V with "listed" equipment? Now the question is with the higher voltage I think there is a minimum spacing requirement such that the worker can be thrown back from the equipment and be clear of contact? Anyone know what that distance is? Would be handy to have that free space when designing a powerhouse.
"2020 Code Language:
690.7 Maximum Voltage. The maximum voltage of PV system dc circuits shall be the highest voltage between any two conductors of a circuit or any conductor and ground. The maximum voltage shall be used to determine the voltage and voltage to ground of circuits in the application of this Code. Maximum voltage shall be used for conductors, cables, equipment, working space, and other applications where voltage limits and ratings are used.
PV system dc circuits on or in buildings shall be permitted to have a maximum voltage no greater than 1000 volts. PV system dc circuits on or in one- and two-family dwellings shall be permitted to have a maximum voltage no greater than 600 volts. Where not located on or in buildings, listed dc PV equipment, rated at a maximum voltage no greater than 1500 volts, shall not be required to comply with Parts II and III of Article 490."
690.7 Maximum Voltage.
The maximum voltage of PV system dc circuits shall be the highest voltage between any two conductors of a circuit or any conductor and ground.
www.electricallicenserenewal.com
One job where we went with higher voltage recently was a ground mount with the Fronius mounted on the array. Service drop was on a pole, then the house was 300' away. Solar array was right next to the service drop. No local inspections for residential. PV wire literally went directly into the Fronius, so everything just kind of fell in place to run a higher voltage string.
With a Grid-tie only inverter, there is a much higher chance of the inverter being mounted outside, right by the PV array. There are still limitations though...
This would be interesting to know! Although, I guess I'm not aware of an inverter that is rated to 1000V and can't be installed outdoors... So maybe the answer would be to have it mounted on the outside wall (exterior) of a powerhouse and have any other equipment (such as batteries etc.) inside.
Pretty cool overview
I’m sold on it
Edit: that video also shows the new Schneider home 7.7kw HV inverter, 10kw battery, and split bus load center as well. Pretty neat
Midnites batteries are also UL9540, both 5kwh rack style and 15kwh wall mount with internal heater
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Still waiting for someone to open the top of that so we can see what it looks like, especially since it is supposed to be user-serviceable. Also just looks a lot smaller then a 18kPV.
Other thing still missing info on is the software side.
Other thing still missing info on is the software side.
HighTechLab
AKA Dexter - CTO of Current Connected, LLC
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hehehhe...my first in-progress video is demonstrating the serviceability. Essentially I am taking it down to a sheet metal case with nothing in it, guts spread across two workbenches, then putting it back together and installing it.
Will the video be available this year, by any chance?
Is there any current restrictions on what can be talked about/revealed until a certain date? The few vids available doesn't actually really reveal anything that you couldn't get by reading the specs.. although last video did mention being able to run loads with ONLY PV power available which was interesting.
timselectric
If I can do it, you can do it.
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The thing that I found interesting was the MPPT specs.
70v to 550v and 40a/30a.
70v to 550v and 40a/30a.
HighTechLab
AKA Dexter - CTO of Current Connected, LLC
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Rude
I don’t think anything is totally restricted, but I always like to check with MN because I don’t want to give information that may change.
The inverter will boot and grid export with no battery. As far as operating off-grid with no battery, I’ll check before I say it can or can’t.
Impressive but they need to include duration on the front page/sales flyer. Are we talking seconds or a fraction of a second? It makes a big difference. Wish they would say up front.
Lt.Dan
Solar Wizard
Seems unnecessary for something that once its running, you would rarely look at. I don't think the screen on my SolArk has turned on in weeks lol.
Brucey
Solar Wizard
If the display can be duplicated via web browser or app can run it on a big tablet, in the convenience of your favorite recliner.
NC_hydro
Solar Enthusiast
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Brucey
Solar Wizard
Doesn't seem like long but thats a huge difference versus the solarks and eg4s with zero surge capability on the 120V legs. Basically need to buy two solarks or eg4s to get close to matching that.
NC_hydro
Solar Enthusiast
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I imagine it's not quite as long as the blue, green, or yellow LF inverters, but it sounds like it's very respectable for an HF inverter.
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