Mppt 80 amp all in one

Dunndeal

SparksMayFly
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Dallas Texas
My system is 48 volt system. I’m using 16, 90 ah lifepo4
Cells. The voltage across my cells is 54.13 volts. The
voltage of the PV array is 164.1 volts. My “all in one” solar
charge controller is a Impinvt MPPT SCC 80 amp. My
inverter is a Flamezum 3000W/6000W pure sine inverter.

When I apply battery voltage and solar voltage to the
system I get a message on the “all in one“ that
there’s “Over voltage of battery warning. Again my
battery voltage is 55.20 volts. I get no voltage to the inverter.
Any ideas what I’m not doing. By the way, I disconnected the
victron BP because it will only handle 24 volts
 

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Bud Martin

Photon Sorcerer
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What is the MAX PV input Voltage of that SCC?
Do you still get the warning if the PV panels are not connected to the SCC?
BTW, you should not connect the inverter or any device that has high inrush current to the switched DC load terminals, the inverter DC input should be connected directly to the batteries, the switched DC load output can be damaged by high inrush current.
Are those breakers, especially on the inverter, $15 ~ 20 breakerS from EBAY or AMAZON?
 
Last edited:

acdoctor

Solar Addict
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Oct 5, 2020
Messages
694
Location
Central Arkansas
Model AP 80 A has a max input over voltage of 150 volts.
You will need to have less panels in series. Panel voltage in combined in series. You could put half in one series string and have in another. That would reduce the over voltage to 82 volts and increase the amperage to double.
In the pictures you have the inverter connected to the load of the charge controller which is fine it can help with low voltage cutoff but you can’t pull more than the 80 amp designed or less depending on the specs. For you that works out to about the 3000 watts.
 

Dunndeal

SparksMayFly
Joined
Jul 9, 2020
Messages
52
Location
Dallas Texas
The max input PV voltage for a 48V system is
DC36v-DC150. I have 4, 305 watt panels for total 1220 watts. 5600 watts is max for SCC. Same message with or without solar connected. The solar input and battery input of the mppt seems to be working fine according to the display on the SCC. Just the dc load terminal is no power
 

Bud Martin

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Messages
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As I indicate, that dc output terminal is not made to handle large in rush current drawn by the inverter every time you apply DC to the input of the inverter, the switched MOSFET using for switching can easily be damaged.
So the Voltage at the DC Load terminal is 0VDC when measured with the DC Voltmeter?
 

Dunndeal

SparksMayFly
Joined
Jul 9, 2020
Messages
52
Location
Dallas Texas
Model AP 80 A has a max input over voltage of 150 volts.
You will need to have less panels in series. Panel voltage in combined in series. You could put half in one series string and have in another. That would reduce the over voltage to 82 volts and increase the amperage to double.
In the pictures you have the inverter connected to the load of the charge controller which is fine it can help with low voltage cutoff but you can’t pull more than the 80 amp designed or less depending on the specs. For you that works out to about the 3000 watts.
That never occurred to me. That’s what I’ll try next. Great advice
 

Dunndeal

SparksMayFly
Joined
Jul 9, 2020
Messages
52
Location
Dallas Texas
Model AP 80 A has a max input over voltage of 150 volts.
You will need to have less panels in series. Panel voltage in combined in series. You could put half in one series string and have in another. That would reduce the over voltage to 82 volts and increase the amperage to double.
In the pictures you have the inverter connected to the load of the charge controller which is fine it can help with low voltage cutoff but you can’t pull more than the 80 amp designed or less depending on the specs. For you that works out to about the 3000 watts.
Sir: you sound familiar with the MPPT ap80 SCC . It’s my first mppt and I’m wondering what is your opinion on this unit?
 

acdoctor

Solar Addict
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Oct 5, 2020
Messages
694
Location
Central Arkansas
No I don’t own one just looking it up on the internet. I do own a inverter of theirs, it’s good stuff, English translation is lacking.
Reconfigure the panels to get less than the 150 volts. Disconnect the inverter from the load terminals and connect to the terminal blocks. But please get a proper fuse as soon as you come off the batteries. You need fusing on input of 48 to 12 volt converter. But very first thing move all the metal stuff from near battery terminals.
I don’t see any BMS leads either? Are you not going to use one?
 

Bud Martin

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I do not see any BMS either, and I also see one odd ball battery in the series with other batteries as well.
 

Dunndeal

SparksMayFly
Joined
Jul 9, 2020
Messages
52
Location
Dallas Texas
I do not see any BMS either, and I also see one odd ball battery in the series with other batteries as well.
That was another question I had. Do I need the bms since it’s a all in one SCC. The odd battery was because the positive female battery terminal stripped out. The odd one was a spare
 

Dunndeal

SparksMayFly
Joined
Jul 9, 2020
Messages
52
Location
Dallas Texas
The max input PV voltage for a 48V system is
DC36v-DC150. I have 4, 305 watt panels for total 1220 watts. 5600 watts is max for SCC. Same message with or without solar connected. The solar input and battery input of the mppt seems to be working fine according to the display on the SCC. Just the dc load terminal is no power
The VOC is 45.6 per panel
 

Bud Martin

Photon Sorcerer
Joined
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Messages
3,491
That was another question I had. Do I need the bms since it’s a all in one SCC. The odd battery was because the positive female battery terminal stripped out. The odd one was a spare
Yes you do need BMS, the BMS will monitor the status of each cell and will go into shutdown if it detects fault, ALL-IN-ONE SCC cannot do anything if one/or more of the cell over charged or over discharged.
BTW, you do not ALL-IN-ONE SCC, the all in will have SCC/INVERTER.
The odd battery has the same spec as the others? If not it will not be good to do that.
 
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