Outback VFX3648 AC input maximum

A place to post images of your OutBack Power System

Moderators: OutBack, OutBack Moderator Team

Outback VFX3648 AC input maximum

Postby jainsw on Sun Jan 14, 2018 12:08 pm

According to the spec sheet for the Outback VFX3648, it should allow an AC input of 60aac. For whatever reason, my Outback VFX3648 will only allow a maximum of 20aac from my generator. What am I missing?
jainsw
Forum Expert
 
Posts: 55
Joined: Mon Dec 28, 2009 11:54 am
My RE system: My setup is a 48v system and is comprised of the following components:
12-ES190 Evergreen solar panels-pole mount non-auto tracking, 4 220 Volt GE panels fixed mount
9-Hanwha Q Peak 300watt panels
1-Outback FX60 PV Charge controller 60a MPPT, 12-60 vdc. 60a output
1-Outback FX80 PV CC, 80a MPPT
1-Outback VFX3648 3.6kw, 120vac output
1-Mate
1-Outback Hub
1-Outback FNDC
24-,Trojan L-16RE-2V lead acid 1110ah C20 batteries

Re: Outback VFX3648 AC input maximum

Postby pss on Sun Jan 14, 2018 1:23 pm

According to Outback spec sheet, that inverter has only a 45 ADC continuous charging output. That is small. Your battery bank is big. Your panel wattage is small. Your batteries will require charging from generator and or the grid and will take a long time because your inverter's charger is small capacity. The solution would be a generator with an on board charger connected directly to the battery bank.
You can input a circuit up to 60 amps into the inverter, but the continuous output of that inverter is only 30 amps.

Think of a 120 volt 60 amp circuit from your generator or grid coming into your inverter. That would be 7,200 watts of power. But your inverter is only capable of outputting 120 volts at 30 amps (3600 watts) to your loads and the charger can do 45 amps DC in the battery bank at say 56 volts = 2520 watts.

Your problems stem from a mismatch of the system components and their functional capacities. The solution is one of either more panels and charge controllers, an inverter with a bigger charger built in, a smaller battery bank or a generator with a built in charger.
Please feel free to follow up with more questions.
pss
Forum Expert
 
Posts: 66
Joined: Mon Jul 24, 2017 8:40 am
My RE system: 7800 watts in three strings, Flexmax 60 x 3, Radian 8046A, GLSC load center, Mate 3, Hub 10.3 and 900 Amp, 48V Trojan T105-RE battery bank.

Re: Outback VFX3648 AC input maximum

Postby jainsw on Sun Jan 14, 2018 2:18 pm

pss wrote:According to Outback spec sheet, that inverter has only a 45 ADC continuous charging output. That is small. Your battery bank is big. Your panel wattage is small. Your batteries will require charging from generator and or the grid and will take a long time because your inverter's charger is small capacity. The solution would be a generator with an on board charger connected directly to the battery bank.
You can input a circuit up to 60 amps into the inverter, but the continuous output of that inverter is only 30 amps.

Think of a 120 volt 60 amp circuit from your generator or grid coming into your inverter. That would be 7,200 watts of power. But your inverter is only capable of outputting 120 volts at 30 amps (3600 watts) to your loads and the charger can do 45 amps DC in the battery bank at say 56 volts = 2520 watts.

Your problems stem from a mismatch of the system components and their functional capacities. The solution is one of either more panels and charge controllers, an inverter with a bigger charger built in, a smaller battery bank or a generator with a built in charger.
Please feel free to follow up with more questions.


Thank you for responding. I am about to add this week another CC (OB 80 FX) along with 9-300 watt panels so that should help with charging the batteries, no? Also, with my current set up with my gen wired through the inverter, my Mate tells me on 20aac is allowed. While the generator is running, it will easily handle all the home loads and put 20amps into the batteries. What I hear you saying is the only way to get more from the generator into the batteries is to bypass the inverter?
jainsw
Forum Expert
 
Posts: 55
Joined: Mon Dec 28, 2009 11:54 am
My RE system: My setup is a 48v system and is comprised of the following components:
12-ES190 Evergreen solar panels-pole mount non-auto tracking, 4 220 Volt GE panels fixed mount
9-Hanwha Q Peak 300watt panels
1-Outback FX60 PV Charge controller 60a MPPT, 12-60 vdc. 60a output
1-Outback FX80 PV CC, 80a MPPT
1-Outback VFX3648 3.6kw, 120vac output
1-Mate
1-Outback Hub
1-Outback FNDC
24-,Trojan L-16RE-2V lead acid 1110ah C20 batteries

Re: Outback VFX3648 AC input maximum

Postby pss on Sun Jan 14, 2018 2:36 pm

Is your generator outputting 240 volts, 20 amps to your Outback inverter?
That's 4800 watts. If you subtract your load, that's what you have left to charge the batteries.
Also remember you only want to discharge your batteries ideally by 25% from full each day, rarely to 50% discharge and in exceptions to 75%. Yes, you can charge directly from generator's inverter if it has one.
Yes, adding more panels will help charge the batteries.
Remember, if you do not have a continuous duty generator, then you will put a lot of wear and tear on it.
pss
Forum Expert
 
Posts: 66
Joined: Mon Jul 24, 2017 8:40 am
My RE system: 7800 watts in three strings, Flexmax 60 x 3, Radian 8046A, GLSC load center, Mate 3, Hub 10.3 and 900 Amp, 48V Trojan T105-RE battery bank.

Re: Outback VFX3648 AC input maximum

Postby jainsw on Sun Jan 14, 2018 2:46 pm

We have a 12kw Sentry Pro propane generator and it is not an inverter generator as far as I know, but we live at 8600' elevation so it is somewhat derated.

If you don't mind, perhaps you can help me with another mystery that just came up. I have my CC set to absorb for 1 hour at 58v, but instead for the past couple of days, in full sun with plenty of available energy and no big loads go to absorb for 24 minutes, then switch to float for an hour?
jainsw
Forum Expert
 
Posts: 55
Joined: Mon Dec 28, 2009 11:54 am
My RE system: My setup is a 48v system and is comprised of the following components:
12-ES190 Evergreen solar panels-pole mount non-auto tracking, 4 220 Volt GE panels fixed mount
9-Hanwha Q Peak 300watt panels
1-Outback FX60 PV Charge controller 60a MPPT, 12-60 vdc. 60a output
1-Outback FX80 PV CC, 80a MPPT
1-Outback VFX3648 3.6kw, 120vac output
1-Mate
1-Outback Hub
1-Outback FNDC
24-,Trojan L-16RE-2V lead acid 1110ah C20 batteries

Re: Outback VFX3648 AC input maximum

Postby jainsw on Sun Jan 14, 2018 3:33 pm

jainsw wrote:
pss wrote:According to Outback spec sheet, that inverter has only a 45 ADC continuous charging output. That is small. Your battery bank is big. Your panel wattage is small. Your batteries will require charging from generator and or the grid and will take a long time because your inverter's charger is small capacity. The solution would be a generator with an on board charger connected directly to the battery bank.
You can input a circuit up to 60 amps into the inverter, but the continuous output of that inverter is only 30 amps.

Think of a 120 volt 60 amp circuit from your generator or grid coming into your inverter. That would be 7,200 watts of power. But your inverter is only capable of outputting 120 volts at 30 amps (3600 watts) to your loads and the charger can do 45 amps DC in the battery bank at say 56 volts = 2520 watts.

Your problems stem from a mismatch of the system components and their functional capacities. The solution is one of either more panels and charge controllers, an inverter with a bigger charger built in, a smaller battery bank or a generator with a built in charger.
Please feel free to follow up with more questions.


Thank you for responding. I am about to add this week another CC (OB 80 FX) along with 9-300 watt panels so that should help with charging the batteries, no? Also, with my current set up with my gen wired through the inverter, my Mate tells me on 20aac is allowed. While the generator is running, it will easily handle all the home loads and put 20amps into the batteries. What I hear you saying is the only way to get more from the generator into the batteries is to bypass the inverter?


Would you please explain the difference in the following from your initial response? What is the difference between 45 ADC Continuous charing output and the 30 continuous output of the inverter? And, why is my MATE allowing me only up to 20aac from the generator?
jainsw
Forum Expert
 
Posts: 55
Joined: Mon Dec 28, 2009 11:54 am
My RE system: My setup is a 48v system and is comprised of the following components:
12-ES190 Evergreen solar panels-pole mount non-auto tracking, 4 220 Volt GE panels fixed mount
9-Hanwha Q Peak 300watt panels
1-Outback FX60 PV Charge controller 60a MPPT, 12-60 vdc. 60a output
1-Outback FX80 PV CC, 80a MPPT
1-Outback VFX3648 3.6kw, 120vac output
1-Mate
1-Outback Hub
1-Outback FNDC
24-,Trojan L-16RE-2V lead acid 1110ah C20 batteries

Re: Outback VFX3648 AC input maximum

Postby blackswan555 on Sun Jan 14, 2018 7:43 pm

According to the spec sheet for the Outback VFX3648, it should allow an AC input of 60aac. For whatever reason, my Outback VFX3648 will only allow a maximum of 20aac from my generator.

I think the number you are looking at is the charge current to batteries in AC amps, 20a x 120v/48v = 50a DC minus some losses, about 45amps DC max charge as spec,

Your FM, Do you have end amps set in it ? That may have ended charge prematurely (Presuming you do not have FNDC) But your comment of
I have my CC set to absorb for 1 hour at 58v
is way too short, 4 hrs would be a better starting place and then use a hydrometer to fine tune, Do you have one and read your SGs ? If not you need to get and start reading them for reasonable battery life,

Tim
My comments are based on my experience and research, They are not endorsed or checked by Outback.I am an independent British electrician living in Spain, So please take this into account when reading /acting on my post`s.
blackswan555
Forum Emperor
 
Posts: 2570
Joined: Sat Aug 30, 2008 5:50 am
Location: Ibiza Spain,
My RE system: Other peoples, VFX "E" versions, FLA`s, Generators.


Return to My OutBack Power System

Who is online

Users browsing this forum: No registered users and 2 guests