Re: [RE-wrenches] 4 Wire Delta

Drake: We are finalizing a project in San Jose back feeding an open delta. The utility has lots of of picky restrictions but they don't seem to balk at the fact the service is delta. William > On Jun 4, 2017, at 10:06 AM, Drake > wrote: > > Hello Wrenches, > > I've recently learned that A

[RE-wrenches] 4 Wire Delta

Hello Wrenches, I've recently learned that AEP, our utility company, believes it is unsafe to backfeed a 4 wire delta transformer. Does anyone know what the issues are? Thanks, Drake Drake Chamberlin Athens Electric LLC OH License 44810 CO License 3773 NABCEP Certified Solar PV 740-448-7328

[RE-wrenches] Three phase, ac coupled system

Esteemed wrenches, Would anyone have a suggestion for an 8-10 kW 3 phase 208/120 battery based inverter that might be ac coupled with a Solaredge grid tied system already in place? None of the usual suspects (OutBack, Schneider, Magnum,SMA, etc.) will work without considerable expense. Has an