Search found 22 matches

by feudalkaos
Fri Feb 14, 2020 7:57 pm
Forum: FLEXmax Charge Controllers
Topic: FlexMax 60 Restarting Bulk before Re-Bulk Voltage
Replies: 7
Views: 954

Re: FlexMax 60 Restarting Bulk before Re-Bulk Voltage

I'm afraid I'm a leadite in a lithium world. ;) I've studied the Alibaba site until I'm cross-eyed and still can't make sense of all the BMS variations I see there, let alone how all the interactions play out. There's not much in the way of purely lithium oriented chargers and inverters so everythi...
by feudalkaos
Fri Feb 14, 2020 7:54 pm
Forum: Marine Applications
Topic: VFX2812 Restart Bulk
Replies: 3
Views: 1833

Re: VFX2812 Restart Bulk

So this system is aboard your boat, yes? There's nada in your profile so I'm just guessing about capabilities and usage. I'm guessing the issue with a solar charge controller(?) is one of battery charge maintenance, and after full charge is reached, continued PV harvest to run house loads. Is that ...
by feudalkaos
Fri Feb 14, 2020 7:50 pm
Forum: FLEXmax Charge Controllers
Topic: FlexMax 60 Restarting Bulk before Re-Bulk Voltage
Replies: 7
Views: 954

Re: FlexMax 60 Restarting Bulk before Re-Bulk Voltage

<cross posted> So this system is aboard your boat, yes? There's nada in your profile so I'm just guessing about capabilities and usage. I'm guessing the issue with a solar charge controller(?) is one of battery charge maintenance, and after full charge is reached, continued PV harvest to run house ...
by feudalkaos
Fri Feb 14, 2020 12:35 pm
Forum: Marine Applications
Topic: VFX2812 Limiting Charging Current?
Replies: 6
Views: 1475

Re: VFX2812 Limiting Charging Current?

my inverter is configured like this: Grid Input AC Limit 30.0A Gen Input AC Limit 30.0A Charger AC Limit 14.0A I have a 30.0A feeder into the inverter from a dock side shore power pedestal. I am seeing 108V from the pedestal which is having an impact but I am surprised at how much. I have not yet me...
by feudalkaos
Fri Feb 14, 2020 12:22 pm
Forum: FLEXmax Charge Controllers
Topic: FlexMax 60 Restarting Bulk before Re-Bulk Voltage
Replies: 7
Views: 954

Re: FlexMax 60 Restarting Bulk before Re-Bulk Voltage

I have tried setting the float voltage and rebulk voltage to 12.4 which is the lowest it will go. Unfortunately, it still has the same result. When I measure the voltage at the controller it shows 13.4 volts. Its possible it was sinking lower in sudden dips but hard for me to say. I cannot see that ...
by feudalkaos
Fri Feb 14, 2020 10:56 am
Forum: FLEXmax Charge Controllers
Topic: FlexMax 60 Restarting Bulk before Re-Bulk Voltage
Replies: 7
Views: 954

FlexMax 60 Restarting Bulk before Re-Bulk Voltage

I have a FlexMax 60 connected to a 400Ah LiFePO4 bank at 12V. I have configured charging as such: Absorb Voltage: 14.0 Time: 0.1 Float Voltage: 13.2 Re-Bulk Voltage: 13.2 This charges in Bulk mode up to 14V as expected then absorbs for 6 minutes. Once this completes it stops charging and goes into s...
by feudalkaos
Fri Feb 14, 2020 10:51 am
Forum: Marine Applications
Topic: VFX2812 Restart Bulk
Replies: 3
Views: 1833

VFX2812 Restart Bulk

I have a VFX2812 connected to a 400Ah LiFePO4 bank at 12V. I have configured charging as such: Absorb Voltage: 14.0 Time: 0.1 Float Voltage: 12.0 Time: 0.0 Re-Float Voltage: 11.0 I am trying to understand at what point the inverter will restart the Bulk charging stage. I can see that it has a re-flo...
by feudalkaos
Fri Feb 14, 2020 10:07 am
Forum: Marine Applications
Topic: VFX2812 Limiting Charging Current?
Replies: 6
Views: 1475

Re: VFX2812 Limiting Charging Current?

It does have a BMS however the BMS is not doing any current limiting.

Currently the BMS is allowing up to 350A for charging current.
by feudalkaos
Fri Feb 14, 2020 7:24 am
Forum: Marine Applications
Topic: VFX2812 Limiting Charging Current?
Replies: 6
Views: 1475

VFX2812 Limiting Charging Current?

I have a VFX2812 connected to a 400Ah LiFePO4 bank at 12V. I have configured charging as such: Absorb Voltage: 14.0 Time: 0.1 Float Voltage: 12.0 Time: 0.0 Re-Float Voltage: 11.0 My bank is around 50% charged and at about 13.5V right now. I set the charger to Auto so it went into Bulk charging mode ...
by feudalkaos
Mon Jan 27, 2020 3:47 pm
Forum: Off Grid Applications
Topic: VFX2812 LiFePO4 Charging
Replies: 7
Views: 1896

Re: VFX2812 LiFePO4 Charging

Thanks for the feedback. I have checked all of those settings and I think I will be okay but only time will tell.

If anyone else has any further knowledge please let me know.
by feudalkaos
Mon Jan 27, 2020 2:55 pm
Forum: Off Grid Applications
Topic: VFX2812 LiFePO4 Charging
Replies: 7
Views: 1896

Re: VFX2812 LiFePO4 Charging

Thank you for the reply! Did you mean LVCO and HVCO instead of LBCO and HBCO? I just looked at the manual and it says that the HVCO for the 12V inverter is 17 volts which should be just fine since the Lithium cells should not get above about 14.8V. The LVCO is pretty low at 10.5V but that is not a b...
by feudalkaos
Mon Jan 27, 2020 1:01 pm
Forum: Off Grid Applications
Topic: VFX2812 LiFePO4 Charging
Replies: 7
Views: 1896

Re: VFX2812 LiFePO4 Charging

Any thoughts on what incompatible is meant to mean? What about these inverters is not compatible with Lithium batteries?

As far as I can tell, I can change settings that should charge and use the batteries without any issue.
by feudalkaos
Mon Jan 27, 2020 8:09 am
Forum: Off Grid Applications
Topic: VFX2812 LiFePO4 Charging
Replies: 7
Views: 1896

VFX2812 LiFePO4 Charging

I have a VFX2812 inverter and am looking to charge a 12V configuration of Lithium battery cells (LiFePO4). I have an Orion Jr 2 BMS so I am not very concerned with keeping the batteries safe since this BMS will stop charging when it gets to high. Does anyone here have experience the VFX series and l...
by feudalkaos
Tue Jan 21, 2020 1:59 pm
Forum: FLEXmax Charge Controllers
Topic: Firmware Updates
Replies: 1
Views: 1219

Firmware Updates

I have seen in the forum several times people who have said they are on higher firmware versions for their Flexmax 60/80 charge controllers but I cannot find where to get said updated firmware. Can someone please enlighten me with a link?

I am currently on 001.009.008 for my Flexmax 60.

Thank you
by feudalkaos
Sun Dec 08, 2019 9:56 am
Forum: Off Grid Applications
Topic: Removing Battery Connection
Replies: 11
Views: 1580

Re: Removing Battery Connection

Yes there were some obtuse replies! :) I decided on the Battle Borns because I don't need any more 'science experiments' in my life right now. Otherwise I would have gotten some much less expensive batteries and worked out a BMS for it. I understand that completely. Honestly, I am wishing I had don...
by feudalkaos
Sun Dec 08, 2019 9:06 am
Forum: Off Grid Applications
Topic: Removing Battery Connection
Replies: 11
Views: 1580

Re: Removing Battery Connection

James I considered using Battleborn but decided against for this very reason. I know that you have no insight into the BMS on Battleborn batteries so I am building my own bank using Sinopoly cells. My ultimate plan is to disconnect AC side and PV side for my charge controllers before disconnecting t...
by feudalkaos
Sat Dec 07, 2019 3:38 pm
Forum: Off Grid Applications
Topic: Removing Battery Connection
Replies: 11
Views: 1580

Re: Removing Battery Connection

I do not entirely agree with your comparison to driving a car into a ditch. If a system is designed to handle such a change in load then it can do as much. My question is only if it is designed to handle it. I agree that most things are not designed to handle a sudden drop in load but not all are th...
by feudalkaos
Fri Dec 06, 2019 3:25 pm
Forum: Off Grid Applications
Topic: Removing Battery Connection
Replies: 11
Views: 1580

Re: Removing Battery Connection

Thank you for the reply however this is not what I was looking for. When I said high voltage event I meant for the batteries not for the Flexmax 60 or VFX2812. My question is, what happens to the Flexmax 60 and VFX2812 when they are outputting power to the connected batteries and suddenly the batter...
by feudalkaos
Fri Dec 06, 2019 12:13 pm
Forum: Off Grid Applications
Topic: Removing Battery Connection
Replies: 11
Views: 1580

Removing Battery Connection

I have an Outback VFX2812 and a Flexmax 60 with 1110 watts of solar. I have been using 675 ah of flooded lead acid batteries for my system but am not going to switch out to Lithium batteries. I have concluded that I need 400ah of lithium and have sourced 16 LiFePO4 100ah cells which I will configure...
by feudalkaos
Mon Oct 28, 2019 1:09 pm
Forum: FLEXmax Charge Controllers
Topic: FM60 Sensed Voltage Different then FlexnetDC and Inverter
Replies: 2
Views: 1621

Re: FM60 Sensed Voltage Different then FlexnetDC and Inverter

Thank you for the suggestion. Honestly, after reading it I first wondered why I hadn't thought of it. ](*,)

Sometimes the easy answers are right in front of you but you are too preoccupied to see them.
by feudalkaos
Sat Oct 26, 2019 11:08 am
Forum: FLEXmax Charge Controllers
Topic: FM60 Sensed Voltage Different then FlexnetDC and Inverter
Replies: 2
Views: 1621

FM60 Sensed Voltage Different then FlexnetDC and Inverter

I have been tracking my voltage readings from each of my Outback devices and they are not tracking the same way. I have used the calibration method for each device to set the voltage to match the actual battery readings that I took with my Fluke True RMS meter. When I have no charger on and the syst...
by feudalkaos
Wed Sep 25, 2019 11:43 am
Forum: FLEXmax Charge Controllers
Topic: Flexmax 60 Min Temp VOC - String Sizing Tool
Replies: 2
Views: 1802

Flexmax 60 Min Temp VOC - String Sizing Tool

I have a Flexmax 60 installed with two panels currently in parallel. This has been installed this way for a few years and has worked well. I decided to up the size of my solar array to 3 370W LG panels. I tried out the String Sizing Tool that I downloaded from the Outback Power support area. When I ...