[RE-wrenches] 3-Phase SolarEdge L-L 215v

[Joe Nelson]

  To date, we have had the greatest success placing a secondary transformer in between the inverter and the PCC( as we have run into this on more than one occasion already). The inverter seems to operate best, and weather it’s WYE, DELTA  or a wild-leg(stinger) you can specify exactly what you need to feed in/out to get the electrical characteristics you are looking for. 

 

Hammond(HPS Sentinel series) work very well,

Dongan transformers have also worked very well for us so far.

 

From: RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Benn Kilburn
Sent: Tuesday, February 13, 2018 9:31 AM
To: ericstikes at gmail.com; RE-wrenches <re-wrenches at lists.re-wrenches.org>
Subject: Re: [RE-wrenches] 3-Phase SolarEdge L-L 215v

 

Sounds like you are working with a 120/208V system?

What do you get from line to ground?

Benn Kilburn

SkyFire Energy

780-906-7807


On Feb 13, 2018, at 9:53 AM, Eric Stikes <eric at harvesthesun.com <mailto:eric at harvesthesun.com> > wrote:

I am troubleshooting a SolarEdge system with 9kW 3-Ph inverters. The system is working OK but production is a bit low. There may be other factors and I am looking into those too but I want to sort out this one issue: I am not too familiar with 3-phase and when I ask SolarEdge about best way to connect to a 3-Ph delta, they advise to stay away from the stinger and connect a 1-ph inverter to L1 & L2 only, and that has worked out fine. However, This system has a 3-ph inverter and L1 to L2 is reading about 215 volts from the utility. L1 to L3 is the same and L2 to L3 is also about 215 volts. Perhaps this is a 3-Ph WYE with just a higher than typical voltage coming from the utility t-former. My thought here is that maybe the 3-ph inverters are only providing 2/3 power back to the utility, or if there's some way to get to 240v L-L. The existing loads are serviced by both 2-pole and 3-pole breakers but everything is pretty much 1-phase I believe. I'm wondering if I should consider reconfiguring the system with 1-Ph inverters tied in to only 2 of the utility legs. I asked SolarEdge weeks ago but getting nothing from them. Any thoughts? Thanks!




Eric Stikes
SunHarvest Solar
+1 (530) 798 - 3738
www.harvesthesun.com <http://www.harvesthesun.com/> 

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