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  • SolarEdge commissioning without net metering meter?

    Hi all! New to the forum. We spent a good part of the covid summer installing a 9.6kW array with 24 panels. 2 strings of 12. I finally have 12 volts at each string coming into the SolarEdge inverter from the SolarEdge optimizers. Looks ready for commissioning. However, the power company...
  • SolarEdge SE 10000H up in smoke

    My SolarEdge SE-10000H has been up for about a week, and producing up to 63kWh a day up here in Maine in March. I have 9600 watts of panels. Yesterday was a bit cloudy, and it was peaking at about 8kW around noon. I noticed on the SE app that it had stopped producing, so went downstairs and...
  • Sunmodo. A year later.

    A while ago, I promised some photos for someone here, but I couldn't find the post! Here are some photos of my DIY solar setup using Sunmodo racking. The cast alloy polished brackets/connectors are beautiful, but maybe a bit overkill. Also, when you use the torque wrench on the set screws...
  • EG4 6500 or 6000 inverter in cold garage. Less than -10C (14F)

    The EG4 inverter spec sheets say that the operating temp low side is -10C (14F). We sometimes get to 0F here. Sometimes even -15F. If I mount the inverter in the garage, it will get that cold. I assume that I should mount it in the basement of the house instead. Obvious I guess, but I...
  • EMT for DC PV inside the house. Why?

    Though code requires the DC PV wires to be in EMT (or some similar metal enclosure, I think), does anyone know the "why"? Other than, "because NEC code requires it", is there any logical reason why? How is EMT safer than PVC? If anything, it seems like PVC would reduce any shock hazard.
  • Panels and Inverters: Voltage or current sources?

    The more I understand, the more I realize that I don't understand. I have a BSEE (electronic E, not electrical E) so you'd think that I might be able to figure this out! Maybe it's because my BSEE is in electronics and not enough electrical! However, I'd really like to be sure. Dealing with...
  • 6500EX-48 - Sell it or keep it?

    I bought an EG4 6500EX-48 about 10 months ago. It is unopened and still sealeed in the box. From reading the forums and watching youtube, it appears that there may be different hardware versions of this model. There sure have been a lot of discussions, and some problems. Most problems appear...
  • LV6048 or GroWatt SPF 6000T DVM-MPV

    Hi. I need to pull the trigger in a couple of days on a LV6048 or GroWatt SPF 6000T DVM-MPV. Both seem very good. I like the LV6048, but the max VDC input of 145vDC sure is limiting for the runs that I need to make (200+ feet). The dual MPPT controllers are nice. The GroWatt has a higher...
  • Ground wire needed between solar panels and SolarEdge inverter??

    250 feet from the house, I have 24 panels, ground mounted rack on metal ground screws from Sunmodo. The ground screws go 4 feet into solid ground. No sand or rocks. Just a mix of soil and clay. NEC code says (my interpretation, as well as Sunmodo docs and SE docs, as I interpret them) that I...
  • On grid and Off grid using SolarEdge and Growatt

    I'm annoyed that I can't use my 1-year old SolarEdge inverter without a grid connection, but need to live with it! I've purchased a GroWatt inverter to use when the grid goes down. If you have some time, please comment on the system that I plan on adding to my current on-grid system. I'm using...
  • Auto transformer dangers

    The use of auto transformers has been discussed on Will's, David's and Ian's channels. I've read through countless comment on the topic when use with GroWatt (or any 240v only) inverter, and I remained confused. I was hugely confused by Ian's excellent demo where the 120v bulbs blew when the...
  • Batteries - Encharge 3, BigBattery or Electric Car Parts?

    Any opinions on batteries from Enphase, Big Battery or Electric Car Parts? It looks like batteries are finally coming down in price. $2300 for a 3 kWh Encharge-3: $1900 for a 5 kWh Big Battery: $2300 for a 5 kWh Electric Car Parts: Looks like shipping is about $400 for each company. Will...
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