Re: [RE-wrenches] AC Coupled Enphase

On 8/30/2017 5:54 AM, Drake wrote: Hi boB, Would there be any issues with delayed control of the microinverters? We do  plan to  use disconnects for maintenance. Thanks, Drake I highly doubt there would be enough delay to worry about anything regarding battery damage Even with

Re: [RE-wrenches] AC Coupled Enphase

Hi boB, Would there be any issues with delayed control of the microinverters? We do plan to use disconnects for maintenance. Thanks, Drake At 06:27 PM 8/29/2017, you wrote: Content-Type: multipart/alternative; boundary="155C815B9802686293824DDD" Content-Language: en-US

Re: [RE-wrenches] AC Coupled Enphase

Probably a good idea to test that HBCO is set right, actually does shut down the inverter, and stays programmed correctly in a LBCO or complete drain of battery. Dave DrakeDave > The plan is to use N/C relays. As this is in a > backup system, N/O relays would need to spend > most of their lives

Re: [RE-wrenches] AC Coupled Enphase

The plan is to use N/C relays. As this is in a backup system, N/O relays would need to spend most of their lives energized. The relays will not be able to receive any control power while the grid is up. If all else fails and the relays stay closed and overcharge the batteries, the high

Re: [RE-wrenches] AC Coupled Enphase

My vote would still be to use two single pole relays as suggested previously to kill each leg. That way you build in redundancy and dropping either leg will do the trick. In fact, it sounds like this would be even better than a two pole relay for the redundancy reason. The other factor is whether

Re: [RE-wrenches] AC Coupled Enphase

The one-pole relay will work for de-energizing any of the Enphase microinverters. Nick Soleil Field Application Engineer Enphase Energy Cell: 707-321-2937 On Aug 28, 2017, at 6:03 PM, Drake > wrote: Hi Nick, I

Re: [RE-wrenches] AC Coupled Enphase

Hi Nick, I should mention that the inverters being AC coupled are M-250s, not the new IQ series. Would that make any difference? Thanks, Drake At 03:12 PM 8/28/2017, Drake wrote: Hi Nick, At 11:20 AM 8/28/2017, you wrote: Content-Language: en-US Content-Type: multipart/alternative;

Re: [RE-wrenches] AC Coupled Enphase

Hi Nick, That is very good news. I just hit the wall trying to find 2 pole solid state N/C relays. I was trying to decide whether to go back to mechanical or buy double the amount of single pole relays. Thanks, Drake At 11:20 AM 8/28/2017, you wrote: Content-Language: en-US Content-Type:

Re: [RE-wrenches] AC Coupled Enphase

You can use a one-pole relay. We show one-pole switching in our zero-export, self-consumption doc for PEL applications. Nick Soleil Field Application Engineer Enphase Energy Cell: 707-321-2937 On Aug 28, 2017, at 6:44 AM, Drake

Re: [RE-wrenches] AC Coupled Enphase

On 8/28/2017 8:44 AM, Drake wrote: Alternatively, does anyone know of reasonably priced, 2 pole solid state relays? Just use two single pole SSRs. One for each leg. There are two pole SSR, but the price is not going to be bargain basement. -James Jefferson Jarvis APRS World, LLC

[RE-wrenches] AC Coupled Enphase

Hello Wrenches, I am going to AC couple some Enphase inverters and found some really nice solid state, single pole relays to control them with. Enphase says I must use 2 pole relays for the control current even though the disconnects will turn off all power for maintenance. Enphase claims