GVFX3524 Setpoints and No sell energy

Discussion about OutBack Inverters in Grid Tie Applications

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ejimcruz1
Forum Junior Member
Posts: 1
Joined: Sat Aug 29, 2020 7:02 pm
My RE system: GVFX3524 qty 2
Mate and Hub
Midnite Classic 150
Solar Array qty 20 panels 42V 300W
Wind Turbines 1500 qty 4
Coleman 400
AGM Battery bank 900A

GVFX3524 Setpoints and No sell energy

Post by ejimcruz1 » Sun Aug 30, 2020 10:33 am

Equipment List:
Qty=2 Outback Power GVFX3524
Qty=1 Hub four ports
Qty= 1 Mate 1 code rev 4.2.2
Inverters setup as master and slave
For a load of 7k and 220V.
Battery C&D Technology UPS12-400M
Battery AGM 12V 102A each
Battery bank setup in series and parallel
For Total 24V and 900A.
Solar Panel Array 3500W at 126V
Charge controller Midnite Classic 150
Wind Turbines qty=4 24V 1500W ea
Total wind power 24V 4000 Watts plus.
Charge controller Coleman Air 440
All power ends at batteries.
Wires, breakers, disconnects follow code
and requirements.

The issue on hand is to know the setpoints for mate and inverters to use for upgraded battery bank and inverters. And also see if is possible not to sell Power to grid since no provider wants to buy or credit.

Is all a DIY project started 2016.
I started with one GVFX3524 and learned plus saved a lot of money with it.

I liked Outback inverters read and learn a lot about their performance.. I know Outback has
better inverters. But hope I can use my two
GVFX3524. The house load is ok in summer but in winter months is much demanding.
The furnace heat coils are the issue 15k.
The house is all electric..

My hope, ignorance and wish is to use the inverters along with grid power to meet the house power demand.. To be honest also save money.. I wish ...I could trade in for better Outback inverter.. But with todays situation. Is hard to accomplish.

So for now I hope you can help me, teach and provide me with your wisdom plus corrections.

Please forgive me for asking and posting.

Again...here are my questions.
1. What are correct setpoints for inverter, charger and mate.. with battery bank and load?
Load is 6500

2. Is it possible to generate power with grid power and not sell any energy to the grid?
No providers buy back energy in area or are
Good deals to follow..

3. If is possible not to sell.. what are setups
Setpoints need it?

4. In event is not possible which inverter will work along with grid and batteries?

raysun
Forum Emperor
Posts: 2921
Joined: Tue Jul 26, 2016 5:57 am
My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
SimpliPhi 48-3.8 (6 @ 48v)
Outback IBR3 battery enclosure
Suniva 330 watt panels (12 - 6 strings of 2 in series)
Hyundai 355 watt panels (6 - 3 strings of 2 in series)
Honda EU7000is gas fuel generator

Re: GVFX3524 Setpoints and No sell energy

Post by raysun » Mon Aug 31, 2020 4:59 pm

Look for answers in-line.
ejimcruz1 wrote:
Sun Aug 30, 2020 10:33 am
Equipment List:
Qty=2 Outback Power GVFX3524
Qty=1 Hub four ports
Qty= 1 Mate 1 code rev 4.2.2
Inverters setup as master and slave
For a load of 7k and 220V.
Battery C&D Technology UPS12-400M
Battery AGM 12V 102A each
Battery bank setup in series and parallel
For Total 24V and 900A.
Solar Panel Array 3500W at 126V
Charge controller Midnite Classic 150
Wind Turbines qty=4 24V 1500W ea
Total wind power 24V 4000 Watts plus.
Charge controller Coleman Air 440
All power ends at batteries.
Wires, breakers, disconnects follow code
and requirements.

The issue on hand is to know the setpoints for mate and inverters to use for upgraded battery bank and inverters. And also see if is possible not to sell Power to grid since no provider wants to buy or credit.

Is all a DIY project started 2016.
I started with one GVFX3524 and learned plus saved a lot of money with it.

I liked Outback inverters read and learn a lot about their performance.. I know Outback has
better inverters. But hope I can use my two
GVFX3524. The house load is ok in summer but in winter months is much demanding.
The furnace heat coils are the issue 15k.
The house is all electric..

My hope, ignorance and wish is to use the inverters along with grid power to meet the house power demand.. To be honest also save money.. I wish ...I could trade in for better Outback inverter.. But with todays situation. Is hard to accomplish.

So for now I hope you can help me, teach and provide me with your wisdom plus corrections.

Please forgive me for asking and posting.

Again...here are my questions.
1. What are correct setpoints for inverter, charger and mate.. with battery bank and load?
Load is 6500
Two battery models are mentioned. Are there two separate battery banks?

Two types mixed in a single battery?


2. Is it possible to generate power with grid power and not sell any energy to the grid?
No providers buy back energy in area or are
Good deals to follow..
Yes, its entirely possible to generate power without selling back to the grid.

3. If is possible not to sell.. what are setups
Setpoints need it?
The inverter mode will dictate its behavior, vis-a-vis the grid. The mode not to use is "Grid Tied".

4. In event is not possible which inverter will work along with grid and batteries?

The more current FXR inverters have somewhat more sophistication in operational modes. However, the current inverter will work fine. It can be set up to connect to the grid for AC IN (inverter bypass and battery charging), and of course draw battery current to power loads when the grid isn't being used.

Mike Curran
Forum Emperor
Posts: 1788
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 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: GVFX3524 Setpoints and No sell energy

Post by Mike Curran » Mon Aug 31, 2020 5:28 pm

I've had my 2 GVFX3524 inverters since 2007 and they have served me well in a grid-tie/battery backup system. As long as they hold up (getting long in the tooth by now), you should be happy with them.
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

fcwlp
Forum Czar
Posts: 530
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: GVFX3524 Setpoints and No sell energy

Post by fcwlp » Mon Aug 31, 2020 6:32 pm

raysun wrote:
Mon Aug 31, 2020 4:59 pm
3. If is possible not to sell.. what are setups
Setpoints need it?
The inverter mode will dictate its behavior, vis-a-vis the grid. The mode not to use is "Grid Tied".
The GVFX inverters do not have the seven modes of the newer inverters. If you are on OpticsRE (if not on OpticsRE you will have to find on the Mate) go to the AC Input tab for each inverter:
- Input Type - Grid
- Sell Voltage - input a value above your absorb voltage
- Offset Enable - Enable (I am 95% certain that the GVFX functions the same as the FXR, but I don't see it in my GVFX manual, basically it "offsets" dependence on the grid if renewable energy is available.)

I assume you have relatively cheap electricity if you have electric heat. You may want to consider a heat pump instead of resistance. For an air to air system depending on the outdoor temperature the are 2.5 to 5 times more efficient than resistance heating. If you go with a ground source heat pump they are 5 times more efficient due the constant ground temperature. That would cut your 15kW down to 3kW.

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