FX60 shut off setpoint?

Discussion about the MX60 Charge Controller

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outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

FX60 shut off setpoint?

Post by outbackpaige » Sun May 24, 2020 3:36 pm

My system keeps shutting down in the early morning. I think the shut off is set too high, maybe 24.2 but don't know how to change it. Could someone point me to where in the manual I can find steps? I know how to change float/absorb and EQ.
Also wondering if theres a log for past errors? Today there was a red error light but I wasnt there to read it, someone else switched the system back on without checking.
Thanks!

raysun
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My RE system: Flexpower Two: (2) FXR3048A, (2) FM80, MATE3s, FlexNetDC
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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: FX60 shut off setpoint?

Post by raysun » Sun May 24, 2020 3:48 pm

outbackpaige wrote:
Sun May 24, 2020 3:36 pm
My system keeps shutting down in the early morning. I think the shut off is set too high, maybe 24.2 but don't know how to change it. Could someone point me to where in the manual I can find steps? I know how to change float/absorb and EQ.
Also wondering if theres a log for past errors? Today there was a red error light but I wasnt there to read it, someone else switched the system back on without checking.
Thanks!
It's not clear what's meant by 'system keeps shutting down' do you mean the inverter?

The MX60 charge controller would be sleeping in early morning before there is enough sun to wake it. That has nothing to do with battery voltage.

If you complete your profile with the complete list of equipment, we'll be able to help you better.

provo
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My RE system: Sixteen Evergreen EC-120
(4 strings, total 1920W)
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Hub 10
Mate3s
FNDC and Trimetric
Location: Sierra foothills

Re: FX60 shut off setpoint?

Post by provo » Sun May 24, 2020 5:51 pm

outbackpaige wrote:
Sun May 24, 2020 3:36 pm

My system keeps shutting down in the early morning. I think the shut off is set too high, maybe 24.2 but don't know how to change it. Could someone point me to where in the manual I can find steps?

Thanks!
FX60 is confusing -- the MX60 charge controller doesn't have a low-battery cutoff to my knowledge. The inverters do, and they are programmed in the Mate, under Inverter Settings, or in OpticsRE in the inverter device map. Like raysun says, tell us more....

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: FX60 shut off setpoint?

Post by outbackpaige » Sun May 24, 2020 6:28 pm

I mean the electrical power in my house goes out. To get it running again, I switch the battery breaker to off then back to on, it starts up again. This has occurred 5 times in 2 months. I have 12 12 v batteries and 10 180 watt solar panels. An outback FX60 charge controller and inverter and Mate and a trace engineering DC disconnect /overcurrent module. My loads are minimal.

SandyP
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Posts: 421
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My RE system: 8 x 190W 24V Suntech panels (4 strings of 2) July 2011
4 x 325W 24V Suntech panels (2 strings of 2) added Sept2018
Mate2
Outback FM60 MPPT (max output lowered to 55amps)
12 x 2V Hoppecke GEL 660 Ah C100 - 24V System
Outback VFX3024 Inverter/Charger
Victron BMV-602s
Honda 5.5kW Genset
Location: Victoria, Australia

Re: FX60 shut off setpoint?

Post by SandyP » Sun May 24, 2020 6:50 pm

outbackpaige wrote:
Sun May 24, 2020 3:36 pm
My system keeps shutting down in the early morning. I think the shut off is set too high, maybe 24.2 but don't know how to change it. Could someone point me to where in the manual I can find steps?
If you have the older Mate/Mate2 then the steps to change the low battery cut out are :

ADV -> enter password "141" -> FX -> INV -> Down -> Down -> Down -> low battery cut-out set point

Using the DEC button , change the value to 23.8 and see how you go.

Then press the Down button again (4 more times) to get to the end of the INV programming menus, then press MAIN to return to the main screen.

provo
Forum Czar
Posts: 529
Joined: Thu Jul 27, 2006 4:34 pm
My RE system: Sixteen Evergreen EC-120
(4 strings, total 1920W)
Eight Rolls S-550 (2 strings, total ~800Ah @ 24V)
One FM80
One VFXR3524A
Hub 10
Mate3s
FNDC and Trimetric
Location: Sierra foothills

Re: FX60 shut off setpoint?

Post by provo » Sun May 24, 2020 6:53 pm

outbackpaige wrote:
Sun May 24, 2020 6:28 pm
I mean the electrical power in my house goes out. To get it running again, I switch the battery breaker to off then back to on, it starts up again. This has occurred 5 times in 2 months. I have 12 12 v batteries and 10 180 watt solar panels. An outback FX60 charge controller and inverter and Mate and a trace engineering DC disconnect /overcurrent module. My loads are minimal.
For charge controllers, there's an MX60, a FLEXmax60 (abbreviated FM60), and a FLEXmax80 (abbreviated FM80).The details are important.

For inverters, there's the FX series, which is probably what you have, but then there are numbers after that, like FX2012T, VFX3524, etc. The numbers are important, if you want help.

The Mate comes in several flavors as well -- the original oval (Mate or Mate2), the Mate3 (larger boxy thing), or the Mate3s. Some important features are lacking in some Mates.

Also, can you tell us the make and model of your batteries and panels, how the batteries are wired in series and parallel, and same for the panels and their wiring details.

And which "battery breaker" you are switching to make it start up again?

It's impossible to help you when after two posts, I still have no idea what components your system contains and how they are connected up.

raysun
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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: FX60 shut off setpoint?

Post by raysun » Sun May 24, 2020 6:56 pm

outbackpaige wrote:
Sun May 24, 2020 6:28 pm
I mean the electrical power in my house goes out. To get it running again, I switch the battery breaker to off then back to on, it starts up again. This has occurred 5 times in 2 months. I have 12 12 v batteries and 10 180 watt solar panels. An outback FX60 charge controller and inverter and Mate and a trace engineering DC disconnect /overcurrent module. My loads are minimal.
Trust me, we know what you mean about what's happening, what we don't know is what equipment is participating in the shutdown because it's not listed in this post or in your profile.

Please update the profile with the equipment list detail: inverter model, mate model, battery model and config; battery monitor model; PV panel models and array config.

All those will help analyse the system and problem, especially when they all can play a part for which you are unaware.

Help us help you by updating your profile.

Mike Curran
Forum Emperor
Posts: 1798
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: FX60 shut off setpoint?

Post by Mike Curran » Sun May 24, 2020 7:43 pm

http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

SandyP
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My RE system: 8 x 190W 24V Suntech panels (4 strings of 2) July 2011
4 x 325W 24V Suntech panels (2 strings of 2) added Sept2018
Mate2
Outback FM60 MPPT (max output lowered to 55amps)
12 x 2V Hoppecke GEL 660 Ah C100 - 24V System
Outback VFX3024 Inverter/Charger
Victron BMV-602s
Honda 5.5kW Genset
Location: Victoria, Australia

Re: FX60 shut off setpoint?

Post by SandyP » Mon May 25, 2020 6:31 am

outbackpaige wrote:
Sun May 24, 2020 6:28 pm
../.. This has occurred 5 times in 2 months. I have 12 12 v batteries and 10 180 watt solar panels. An outback FX60 charge controller and inverter and Mate and a trace engineering DC disconnect /overcurrent module. My loads are minimal.
If this shut down is a new thing then either you have more loads than in the past, solar conditions have been worse or your battery bank has degraded.
As you may have read any more than 2 parallel strings of batteries is asking for trouble and you have 6 of them.
I suggest looking at your battery bank to see if there are bad/loose/corroded connections and/or batteries with low SGs (if flooded) or voltages (if sealed).

JRHill
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Re: FX60 shut off setpoint?

Post by JRHill » Mon May 25, 2020 12:40 pm

SandyP wrote:
Mon May 25, 2020 6:31 am
outbackpaige wrote:
Sun May 24, 2020 6:28 pm
../.. This has occurred 5 times in 2 months. I have 12 12 v batteries and 10 180 watt solar panels. An outback FX60 charge controller and inverter and Mate and a trace engineering DC disconnect /overcurrent module. My loads are minimal.
If this shut down is a new thing then either you have more loads than in the past, solar conditions have been worse or your battery bank has degraded.
As you may have read any more than 2 parallel strings of batteries is asking for trouble and you have 6 of them.
I suggest looking at your battery bank to see if there are bad/loose/corroded connections and/or batteries with low SGs (if flooded) or voltages (if sealed).
Is it not even more than that: Batteries: "12 - 12 v" Twelve in parallel?

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: FX60 shut off setpoint?

Post by outbackpaige » Mon May 25, 2020 4:18 pm

Thank you for all your help, I appreciate it greatly and know its not the easiest "case".
I reset the shutoff to 23.8 and updated my profile to the extent I can right now.
As soon as possible I'll get up onto the 22 foot high roof for panel details.
I inherited this system with my home purchase in Mexico and unfortunately was not given many of the system details.
I cannot see the make or model of the flooded batteries as they are enclosed in a metal casing preventing access information, as shown in photo.
I have tried to upload 4 jpg photos but get response:
"The submitted form was invalid. Try submitting again."

raysun
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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: FX60 shut off setpoint?

Post by raysun » Mon May 25, 2020 4:59 pm

outbackpaige wrote:
Mon May 25, 2020 4:18 pm
Thank you for all your help, I appreciate it greatly and know its not the easiest "case".
I reset the shutoff to 23.8 and updated my profile to the extent I can right now.
As soon as possible I'll get up onto the 22 foot high roof for panel details.
I inherited this system with my home purchase in Mexico and unfortunately was not given many of the system details.
I cannot see the make or model of the flooded batteries as they are enclosed in a metal casing preventing access information, as shown in photo.
I have tried to upload 4 jpg photos but get response:
"The submitted form was invalid. Try submitting again."
It's tough at times getting all the details on an "as built" system. There is one thing to double-check. The Inverter listed is FX2012T, but from the battery voltage I assume it's actually an FX2024T (the 24 volt version of the inverter.)

The Low Battery Cutoff is a protection measure meant to protect the battery from being over discharged. Unfortunately, it's not a perfect method, as the battery voltage varies with state of charge (how "full" the battery is), and rate of discharge (how fast the battery is being drained.)

A fully charged 24V lead-acid battery at rest (no discharge at all) should read about 25.8V. A completely drained battery at rest will read about 22.8V. At 50% state of charge (the lowest a battery should be drained) and at rest, the battery should measure around 24.6 volts.

Under load these voltages would be lower, but the actual reading would vary with the amount of load. For a reading of 23.8V with a light load, the battery is probably below 50% State of Charge. (At rest it would represent about 25% State of Charge).

All the above indicates there is likely reduced battery capacity. As batteries age, the lose capacity, often caused by sulfate buildup on the lead plates. Working them harder (by, in this case, discharging them deeper by lowering the Low Battery Cutoff voltage) will hasten their decline.

The battery should be tested to gauge its health. If this is a flooded lead acid battery, a hydrometer can be used to measure the specific gravity of the electrolyte in each cell. (There are 6 cells in each 12V monoblock.) A quality hydrometer will give a numeric reading on a scale - a fully charged, healthy cell will read about 1.265. A cell at 50% SoC will read about 1.190. A dead cell will read about 1.120. All the cells at any state of charge should read within 0.020 of each other. If a cell varies by more than 0.030, it is likely unhealthy.

I don't mean to sound alarmist, but there is a suspicion the battery is nearing the end of its life. If it's around 5 years old, and has received less than perfect care, the likelihood is higher. Testing will be an important step in evaluating where the battery is at.

SandyP
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Posts: 421
Joined: Tue Jun 21, 2011 4:44 am
My RE system: 8 x 190W 24V Suntech panels (4 strings of 2) July 2011
4 x 325W 24V Suntech panels (2 strings of 2) added Sept2018
Mate2
Outback FM60 MPPT (max output lowered to 55amps)
12 x 2V Hoppecke GEL 660 Ah C100 - 24V System
Outback VFX3024 Inverter/Charger
Victron BMV-602s
Honda 5.5kW Genset
Location: Victoria, Australia

Re: FX60 shut off setpoint?

Post by SandyP » Mon May 25, 2020 7:03 pm

outbackpaige wrote:
Mon May 25, 2020 4:18 pm

I have tried to upload 4 jpg photos but get response:
"The submitted form was invalid. Try submitting again."
There is a size limit on attachments/photos - maybe try one at a time.
A photo of the top of your battery bank will be helpful.

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: FX60 shut off setpoint?

Post by outbackpaige » Wed May 27, 2020 2:41 pm

battery bank.jpg
Thanks, I think we're close to resolving this - you're right it might be bad news.

I've uploaded a photo of the battery bank, hope that helps.
The batteries are 5+ years old and not well maintained as I'm clearly no expert and away frequently for work.

If I understand the measuring process correctly, the Specific Gravity looks pretty bad per your specs (they are flooded lead acid batteries):
I used hydrometer in each battery, same place I add the water, where grey cap is in photo:

1.10; 1.15; 1.20; 1.25; 1.20; 1.10;
1.20; 1.15; 1.15; 1.70; 1.15; 1.20
battery bank.jpg

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: FX60 shut off setpoint?

Post by outbackpaige » Wed May 27, 2020 2:42 pm

battery bank.jpg

raysun
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Posts: 2951
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: FX60 shut off setpoint?

Post by raysun » Wed May 27, 2020 3:50 pm

outbackpaige wrote:
Wed May 27, 2020 2:41 pm
battery bank.jpgThanks, I think we're close to resolving this - you're right it might be bad news.

I've uploaded a photo of the battery bank, hope that helps.
The batteries are 5+ years old and not well maintained as I'm clearly no expert and away frequently for work.

If I understand the measuring process correctly, the Specific Gravity looks pretty bad per your specs (they are flooded lead acid batteries):
I used hydrometer in each battery, same place I add the water, where grey cap is in photo:

1.10; 1.15; 1.20; 1.25; 1.20; 1.10;
1.20; 1.15; 1.15; 1.70; 1.15; 1.20

battery bank.jpg

So the battery monoblocks appear to be 2V (single cell) with 6 wired in series for a 12V string. I assume there are two of these strings wired in parallel. This would make a 12V battery of double the Amp Hour capacity at which the individual monoblocks are rated.

All the readings, except the outlayer, read as if the monoblocks are discharged, or if measured after a complete charge cycle, incapable of holding a charge.

Do you have a generator connected to the AC IN on the Inverter? If so, I'd suggest running a charge cycle using the inverter's built-in charger. It can charge in tandem with the solar charge controller, and the FX60 display will let you track progress. When it reaches FLOAT, the battery should be fully charged.

Take another set of readings at that point and see if they improve.

If the battery does respond to a complete charge, then running an Equalization charge may help improve the cell health a bit further. I'd guess an EQ charge would take 8 - 12 hours, so schedule that excersize for when you can be home to monitor the progress.

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: FX60 shut off setpoint?

Post by outbackpaige » Sat May 30, 2020 5:39 am

Thanks!

Yes, the hydrometer readings below were taken at the end of the day.

I tried charging the batteries yesterday on a sunny day to reach Float with a Honda 2000eu generator for 2 hours but it never got higher than 26.2, and read alternately searching or B-Mppt, never Absorb or Float. I am going to try again today and keep it running longer.

Old notes from the seller of the house/solar system say:
"12 - 2v batteries for a 24v system"
I changed the equipment in profile - its a VFX3524 inverter

Mike Curran
Forum Emperor
Posts: 1798
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: FX60 shut off setpoint?

Post by Mike Curran » Sat May 30, 2020 7:13 am

I tried charging the batteries yesterday on a sunny day to reach Float with a Honda 2000eu generator for 2 hours but it never got higher than 26.2, and read alternately searching or B-Mppt, never Absorb or Float. I am going to try again today and keep it running longer. 
The "B" in B-MPPT" stands for Bulk, which is the stage where your charger is trying to push the battery voltage up to the absorb voltage setting. Once it reaches that point your Mate should show status as absorb* [*I can't recall if the MX60 display shows the word absorb (or some abbreviation thereof) once in absorb], but if your battery reaches the absorb setpoint it'll stay there (provided your charging source remains up to the task) for the preset absorb time in your MX60, then charging will stop until it drops down to float voltage where any charging sources will try to maintain it there, as long as whatever the float time is set for.

Your battery photo looks like it's pretty substantial, meaning it's going to take a large charging source (of current) to get up to full charge. From the looks of it, it seems to have been adequately maintained although there are signs of corrosion at some of the terminals. I think you have the right idea, try to keep your generator running longer - considering your battery's age and current charge state (judging from your specific gravity readings) it's going to take awhile to get it up to the absorb point.

FWIW - Mike
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

SandyP
Forum Guru
Posts: 421
Joined: Tue Jun 21, 2011 4:44 am
My RE system: 8 x 190W 24V Suntech panels (4 strings of 2) July 2011
4 x 325W 24V Suntech panels (2 strings of 2) added Sept2018
Mate2
Outback FM60 MPPT (max output lowered to 55amps)
12 x 2V Hoppecke GEL 660 Ah C100 - 24V System
Outback VFX3024 Inverter/Charger
Victron BMV-602s
Honda 5.5kW Genset
Location: Victoria, Australia

Re: FX60 shut off setpoint?

Post by SandyP » Sat May 30, 2020 7:23 am

outbackpaige wrote:
Sat May 30, 2020 5:39 am
I am going to try again today and keep it running longer.
Old notes from the seller of the house/solar system say:
"12 - 2v batteries for a 24v system"
I changed the equipment in profile - its a VFX3524 inverter
Using your Mate, have a look to see what the absorb settings are in the VFX for charging:

ADV -> enter password "141" -> FX -> CHGR -> Down -> absorb set point.

Hopefully it is around 28.8V.

Then press Down to go to the absorb time limit - make this at least 4 hours.

Then press Down repeatedly until you get to the Charger Programming Completed screen and press Main.

Mike Curran
Forum Emperor
Posts: 1798
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: FX60 shut off setpoint?

Post by Mike Curran » Sat May 30, 2020 7:32 am

Deleted my duplicate post
Last edited by Mike Curran on Sat May 30, 2020 6:58 pm, edited 1 time in total.
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

JRHill
Forum Czar
Posts: 926
Joined: Thu Feb 17, 2011 11:12 am
My RE system: VFX 3648, FM80, 3k panels, Mate3, FNDC (retired), 8ea L16 mixed. Wonderful wife.

Re: FX60 shut off setpoint?

Post by JRHill » Sat May 30, 2020 10:18 am

Mike Curran wrote:
Sat May 30, 2020 7:32 am
Your battery photo looks like it's pretty substantial, meaning it's going to take a large charging source (of current) to get up to full charge. From the looks of it, it seems to have been adequately maintained although there are signs of corrosion at some of the terminals.
In addition to some terminal corrosion, those buss bars between the batteries look to be fashioned from mild steel flat stock. It isn't for sure from the picture but is another consideration. If they are copper then fine and just need to have the system shut down and cleaned up. Use synthetic grease lightly upon reassembly. But if they are steel one would really want to change them out. For the record I didn't have access to copper strap when I made my buss bars (internal, not battery interconnects) so I squashed some 3/4" copper tubing lengthwise and the folded it over and squashed again - soldered the ends and bolted up. Not optimum but for "cobble-in-the-sticks" has worked just fine.

There is a reason that steel is not used as an electrical conductor....

Mike Curran
Forum Emperor
Posts: 1798
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: FX60 shut off setpoint?

Post by Mike Curran » Sat May 30, 2020 7:04 pm

JR - They could also be lead. I have some lead busbars on my older system battery:
20200530_220359.jpg
Edit - although on closer inspection the signs of corrosion mean you're probably right.
http://www.tigoenergy.com/site.php?95b2dca2-ca6c
https://enlighten.enphaseenergy.com/public/systems/Hctc107221

outbackpaige
Forum Member
Posts: 14
Joined: Sat Aug 31, 2013 2:48 pm
My RE system: MX60 X PV MPPT Charge Controller
VFX 3524 inverter
Mate - original oval
Trace Engineering DC Disconnect/Overcurrent Module
Solar Panels: 10 - 180 watt; 2 - 250 watt
Batteries: 12 - 2 v

Re: FX60 shut off setpoint?

Post by outbackpaige » Mon Jun 08, 2020 4:00 pm

Thanks for all your help thus far.
I was able to reach the absorb point 28.8 for four hours with the generator for one day. It doesnt appear possible without the generator and I would like to be able to do so.

What do you advice?

Also, is it true I should not be bringing in more than 1500 watts or my MX60 will be damaged from too much load?

Thank you!

SandyP
Forum Guru
Posts: 421
Joined: Tue Jun 21, 2011 4:44 am
My RE system: 8 x 190W 24V Suntech panels (4 strings of 2) July 2011
4 x 325W 24V Suntech panels (2 strings of 2) added Sept2018
Mate2
Outback FM60 MPPT (max output lowered to 55amps)
12 x 2V Hoppecke GEL 660 Ah C100 - 24V System
Outback VFX3024 Inverter/Charger
Victron BMV-602s
Honda 5.5kW Genset
Location: Victoria, Australia

Re: FX60 shut off setpoint?

Post by SandyP » Mon Jun 08, 2020 5:08 pm

outbackpaige wrote:
Mon Jun 08, 2020 4:00 pm
Thanks for all your help thus far.
I was able to reach the absorb point 28.8 for four hours with the generator for one day. It doesnt appear possible without the generator and I would like to be able to do so.

What do you advice?

Also, is it true I should not be bringing in more than 1500 watts or my MX60 will be damaged from too much load?

Thank you!
It looks like your loads are drawing down your battery to a point below which your solar array/MX60 can produce enough power to get the battery bank voltage back to the absorb set point.
As your MX60 is already at its limit with your existing solar panels, if you do not want to have to keep using the generator, you will need to get another charge controller (FM80 recommended) and some additional solar panels.

raysun
Forum Emperor
Posts: 2951
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: FX60 shut off setpoint?

Post by raysun » Mon Jun 08, 2020 5:18 pm

Given there's enough sunlight hours to Bulk charge, then run an Absorb charge of 4 hours, the best bet to do it without generator assist would be to have enough solar panel / charge controller infrastructure to produce maximum charging current for the battery.

That amount is typically 10 - 13% of the battery's C20 Amp Hour Capacity.

A 60A controller at 24V can safely handle 1500W of solar panel. That means, if the panels put out 100% all the time, the 60A would be enough to charge a 550 - 600AH battery. Panels never put out 100% all the time, so realistically, to charge the 600AH battery, a second charge controller and more panels are needed.

A larger capacity battery, if course, requires higher charging currents and more equipment.

What's the AH capacity of the battery?

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