Skybox Aux Function

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Photon Kapture
Forum Member
Posts: 12
Joined: Tue Jan 14, 2020 4:54 pm
My RE system: 3.9 Kilowatt (13) Solar World sw300 Array.
Outback Skybox
(3) Simpliphi Lithium Iron Phosphate Batteries (2) 3.5 and (1) 3.8KWH
Location: Schroeder, Minnesota

Skybox Aux Function

Post by Photon Kapture » Thu Apr 16, 2020 2:21 pm

Hi All,

Greetings from the North shore of Lake Superior; Schroeder, Minnesota.

I'm new here and new to renewable energy. Slowly getting up to speed. I have installed my first system and am powering my tools from the sun as I finish building our house. We're off-grid. Our system is 13, roof-mounted Solar World sw300 watt panels, an Outback Skybox and 3 Simpliphi batteries. So far so good with only a couple hiccups.

My question:
I'm exploring adding an Axial flux wind turbine I've built through ac coupling as we are located very close to Lake Superior and the winters here are windy and fairly dark.

Is there a way to divert ac power from Skybox using an Aux function within Skybox to trigger a relay to power an ac load such as a water heater based on battery voltage, or Soc?
This would be instead of relying on the frequency shifting feature as I can't find any wind turbine specific grid tie inverters that are ul listed and offer frequency shifting.


Thanks for any thoughts.

fcwlp
Forum Czar
Posts: 542
Joined: Wed Jan 22, 2020 9:40 am
My RE system: GS8048A, FM80 w/3,600 W PV Fixed, FM80 w/2,700W on Zomeworks tracker, Mate3, 24 Trojan 2V L16 1100AH @ C20, Grid-Tied with Kohler 14RESA LPG Generator and MEP-803 Diesel if needed
I also install and maintain grid-tied and off-grid systems, details will be given for these system if required
Location: 80 miles NE of Phoenix at 5500'

Re: Skybox Aux Function

Post by fcwlp » Sat Apr 18, 2020 3:11 pm

I have not installed a SkyBox yet. OB products usually have a plethora of options (varies depending on if is a CC, Inverter or FNDC) for activating aux relays with both dry contacts and 12V contacts. The SkyBox Quick Start guide shows that it has the typical two relays. However the programming guide appears to be lacking in any information relating to conditions that can be used to activate the relays.

I usually enable a vent fan to come on when the battery voltage is above 56.8V for FLA batteries. I do not even see how to do that on a SkyBox.

Good luck and keep us informed of what you are doing.

Mike Curran
Forum Emperor
Posts: 1809
Joined: Sat Aug 28, 2004 6:28 pm
My RE system: Outback - Garage roof:
- 8 (2x4) Evergreen 180's into one FM80 (2007/2020 - replaced MX60)
- 6 (2×3) ALEO S79-300's into one FM80 (2017)
- 2 grid-tied GVFX3524's classic stacked for 120/240VAC (2007)
- 12 Surrette/Rolls 2V x 1766Ah (2007)
- Hub10.3, Mate3s, FNDC, RTS, OpticsRE. Tigo Energy ES maximizers on each PV module.

Westinghouse Solar - Barn roof: (2012)
- 30 (2x15) 235W panels with Enphase M215 microinverters, grid-tied

Outback Skybox - Barn roof: (2019)
- 14 Talesun 275W in series (DC array input to SB inverter/charger)
- 3 SimpliPhi 3.8 batteries, 48V, 225Ah total
- AC coupled input (manual switch during grid outage only) from 14 Talesun 275W,
Enphase M215 microinverters, normally direct grid tied

All self-designed and self-installed
Location: Chagrin Falls, Ohio

Re: Skybox Aux Function

Post by Mike Curran » Sat Apr 18, 2020 6:58 pm

Skybox has a couple pairs of aux contacts but they're designed to be used for advanced generator start. Maybe there's a way to get them to do what you want but I dont know what it is...
Screenshot_20200418-215420_Adobe Acrobat.jpg
Screenshot_20200418-215610_Adobe Acrobat.jpg
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

Photon Kapture
Forum Member
Posts: 12
Joined: Tue Jan 14, 2020 4:54 pm
My RE system: 3.9 Kilowatt (13) Solar World sw300 Array.
Outback Skybox
(3) Simpliphi Lithium Iron Phosphate Batteries (2) 3.5 and (1) 3.8KWH
Location: Schroeder, Minnesota

Re: Skybox Aux Function

Post by Photon Kapture » Tue Apr 21, 2020 9:25 am

Thanks guys,

I can't use the generator contacts because those are tied to the generator tile and auto start function. There is nowhere in the programming guide or the skybox menu that mentions how to set up the contacts for anything but auto gen start. I'll just have to wait and see if future firmwares enable their use for something other than the generator. I'll check back when I figure something out. Thanks.

Ampster
Forum Guru
Posts: 119
Joined: Sat Apr 11, 2015 5:14 pm
My RE system: 5.7K solar system with Solaredge inverter. Heat pump water heater.
28 kWh pack of LFP batteries powering a Skybox which is used for load shifting and backup.
Location: Sonoma, Northern California

Re: Skybox Aux Function

Post by Ampster » Mon Aug 17, 2020 3:19 pm

I have an interest is some use of the Aux function not related to generator start.
I have a BMS connected to a contactor that opens if my BMS senses a Low Voltage or high voltage event. Those setting are outside my settings in the Skybox and would only be used if the Skybox failed LVD or HVD.
I have some other BMS events like temperature or a single cell going over limits that I would like to trigger something like a reduced charging current or resort to grid if my BMS makes a contact closure on the Aux input. Is that possible. Has any body done something like that?

The other option is to use something like an arduino and use CANBUS but I don't have those skills. I know that LG Chem, SimpliPhi and some other battery manufacturers have developed CANBUS communicatilon, I may post the CANBUS question as a new topic.
Drive Tesla Model X and Model 3 which are charged at Super Off Peak rates.

Mike Curran
Forum Emperor
Posts: 1809
Joined: Sat Aug 28, 2004 6:28 pm
My RE system: Outback - Garage roof:
- 8 (2x4) Evergreen 180's into one FM80 (2007/2020 - replaced MX60)
- 6 (2×3) ALEO S79-300's into one FM80 (2017)
- 2 grid-tied GVFX3524's classic stacked for 120/240VAC (2007)
- 12 Surrette/Rolls 2V x 1766Ah (2007)
- Hub10.3, Mate3s, FNDC, RTS, OpticsRE. Tigo Energy ES maximizers on each PV module.

Westinghouse Solar - Barn roof: (2012)
- 30 (2x15) 235W panels with Enphase M215 microinverters, grid-tied

Outback Skybox - Barn roof: (2019)
- 14 Talesun 275W in series (DC array input to SB inverter/charger)
- 3 SimpliPhi 3.8 batteries, 48V, 225Ah total
- AC coupled input (manual switch during grid outage only) from 14 Talesun 275W,
Enphase M215 microinverters, normally direct grid tied

All self-designed and self-installed
Location: Chagrin Falls, Ohio

Re: Skybox Aux Function

Post by Mike Curran » Mon Aug 17, 2020 3:31 pm

If your wind turbine can be set up to output 120 VAC then maybe the solution is to connect it to the SkyBox grid or maybe gen input. Then no issues with AC coupling.
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

Ampster
Forum Guru
Posts: 119
Joined: Sat Apr 11, 2015 5:14 pm
My RE system: 5.7K solar system with Solaredge inverter. Heat pump water heater.
28 kWh pack of LFP batteries powering a Skybox which is used for load shifting and backup.
Location: Sonoma, Northern California

Re: Skybox Aux Function

Post by Ampster » Mon Aug 17, 2020 3:49 pm

Mike Curran wrote:
Mon Aug 17, 2020 3:31 pm
If your wind turbine can be set up to output 120 VAC then maybe the solution is to connect it to the SkyBox grid or maybe gen input. Then no issues with AC coupling.
I don't have a wind turbine. I just increased the size of my battery pack with new LFP cells and I am excercising the pack more now that I am running in Self Consumption mode. it is a battery management issue.
Drive Tesla Model X and Model 3 which are charged at Super Off Peak rates.

Mike Curran
Forum Emperor
Posts: 1809
Joined: Sat Aug 28, 2004 6:28 pm
My RE system: Outback - Garage roof:
- 8 (2x4) Evergreen 180's into one FM80 (2007/2020 - replaced MX60)
- 6 (2×3) ALEO S79-300's into one FM80 (2017)
- 2 grid-tied GVFX3524's classic stacked for 120/240VAC (2007)
- 12 Surrette/Rolls 2V x 1766Ah (2007)
- Hub10.3, Mate3s, FNDC, RTS, OpticsRE. Tigo Energy ES maximizers on each PV module.

Westinghouse Solar - Barn roof: (2012)
- 30 (2x15) 235W panels with Enphase M215 microinverters, grid-tied

Outback Skybox - Barn roof: (2019)
- 14 Talesun 275W in series (DC array input to SB inverter/charger)
- 3 SimpliPhi 3.8 batteries, 48V, 225Ah total
- AC coupled input (manual switch during grid outage only) from 14 Talesun 275W,
Enphase M215 microinverters, normally direct grid tied

All self-designed and self-installed
Location: Chagrin Falls, Ohio

Re: Skybox Aux Function

Post by Mike Curran » Mon Aug 17, 2020 4:17 pm

I don't have a wind turbine. I just increased the size of my battery pack with new LFP cells and I am excercising the pack more now that I am running in Self Consumption mode. it is a battery management issue.
@Ampster: My post was directed at the OP, who does have a wind turbine. Sorry if that wasn't clear.
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

Ampster
Forum Guru
Posts: 119
Joined: Sat Apr 11, 2015 5:14 pm
My RE system: 5.7K solar system with Solaredge inverter. Heat pump water heater.
28 kWh pack of LFP batteries powering a Skybox which is used for load shifting and backup.
Location: Sonoma, Northern California

Re: Skybox Aux Function

Post by Ampster » Mon Aug 17, 2020 9:48 pm

Mike Curran wrote:
Mon Aug 17, 2020 4:17 pm

@Ampster: My post was directed at the OP, who does have a wind turbine. Sorry if that wasn't clear.
No worries, I should have started a new thread. I always appreciate your timely comments.
Drive Tesla Model X and Model 3 which are charged at Super Off Peak rates.

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