Matching 36v solar panels to 48v inverter with build in MPPT

[Jacques1s]

Version:1.0 StartHTML:0000000167 EndHTML:0000007443 StartFragment:0000000457 EndFragment:0000007427 Hi – I have a Axpert MKS 5K inverter. Spec are as below.
MODEL: Axpert MKS 5K
Rated Power: 5000VA/4000W
INPUT Voltage: 230 VAC
Selectable Voltage Range: 170-280 VAC (For Personal Computers), 90-280 VAC (For Home Appliances)
Frequency Range: 50 Hz/60 Hz (Auto sensing)
OUTPUT
AC Voltage Regulation (Batt. Mode): 230VAC – 5 %
Surge Power: 6000VA
Efficiency (Peak): 90 %
Transfer Time: 10 ms (For Personal Computers), 20 ms (For Home Appliances)
Waveform: Pure sine wave
BATTERY & AC CHARGER
Battery Voltage: 48VDC
Floating Charge Voltage: 54 VDC
Overcharge Protection: 60VDC
Maximum Charge Current: 60A
SOLAR CHARGER
Maximum PV Array Power: 3000w
Maximum PV Array Open Circuit Voltage: 60 –115 VDC
Maximum Solar Charging Current: 60A
Maximum Efficiency: 98%
Standby Power Consumption: 2 W

Can I use Sharp NA-E135l5-B panels on this inverter. Looks like the MPPT has a wide range voltage.
Spec = Maximum power Pmax 102.4 Wp / Open-circuit voltage Voc 56.8 V / Short-circuit current sc 2.76 A /
Voltage at point of maximum power V mpp 44.0 V / Current at point of maximum power I mpp 2.33 A /
Nominal operating cell temperature NOCT 46 °C

[Logan5]

your PV input voltage is 60 to 115 volts. so you can wire up 2 to 3 of these panels in series in each equal string. with a Max input of 3Kw

Moderator Edit.
Warning. I believe the poster of this message has given information that can damage equipment or cause harm.
2 panels with a Voc 56.8v = 113.6v this is DANGEROUSLY close to the max voltage limit of 115V. 3 panels in series would certainly cause a failure.
As with all information off the internet, take it with a grain of salt.

[Logan5]

yes, My bad.

[Wy_White_Wolf]

I'd have to say no. This panels don't leave you any room for over voltage situations such as edge of cloud or cold temperatures. You need to run 2 in series to get the voltage high enough to charge a 48V battery bank but when you do the VOC plus 1.25% compensation puts you over the voltage limit. 56.8 *2 * 1.25% = 142

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[littleharbor]

Many thin film modules have high voltage/low amperage ratings. They are not well suited to off grid applications. You would be better off with conventional mono or poly, crystalline modules. Especially the inexpensive 60 cell versions of which 3 in series would give you around 90 - 96 VMP and 108 - 115 VOC

[Jacques1s]

Thanks for all the info. As I have the panels already, I will go with 11 set of 36v series connected panels. ( 135 watt, 72 volt, 3.4 amp sets ) Sets will connect in Parallel.
Am I correct to say that this should give me 72 volt, 37 amp to the MPPT ? ( normal operation )
What about watts total?
MPPT can handle 3000 watts and 60 amps.

Thanks Jacques.

[Wy_White_Wolf]

From your OP
"Voltage at point of maximum power V mpp 44.0 V / Current at point of maximum power I mpp 2.33 A"

2 in series will have an VMP and IMP of 88 volts at 2.33 amps for 205 watts per string.

11 stings in parallel would be 88 volts at 25.6 amps for 2253 watts

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