PeanuTG Posted February 3, 2021 Posted February 3, 2021 Hi I just bought this inverter. I see that the DC PV operating voltage is 120VDC. What is the minimum number of panels required to get the solar side working? I currently have 4 x 330watt panels. Reference: MUS-SOL-I-AX-5NB Condition: New product Rated Power 5000VA / 5000W Maximum PV Array Power 4500W MPPT Range @ Operating Voltage 120VDC~430VDC Maximum PV Array Open Circuit Voltage 450VDC Maximum Solar Charge Current 80A Maximum AC Charge Current 80A Maximum Charge Current 80A Quote
Jakes Louw Posted February 3, 2021 Posted February 3, 2021 41 minutes ago, chrisyoung said: Hi I just bought this inverter. I see that the DC PV operating voltage is 120VDC. What is the minimum number of panels required to get the solar side working? I currently have 4 x 330watt panels. Reference: MUS-SOL-I-AX-5NB Condition: New product Rated Power 5000VA / 5000W Maximum PV Array Power 4500W MPPT Range @ Operating Voltage 120VDC~430VDC Maximum PV Array Open Circuit Voltage 450VDC Maximum Solar Charge Current 80A Maximum AC Charge Current 80A Maximum Charge Current 80A Aren't most panels 32VDC nominal? Quote
Krokkedil Posted February 3, 2021 Posted February 3, 2021 Good day. Well please give us the solar panel details. model number and make Lets say you have 330w Canadian solar panels then the Vmp is around 37v. 3x 4= 148V all 4 panels in series you should be fine if you do not have shading. I think you should add 2 more in series if you can afford it 37x6= 222v Usually the inverters with the high voltage MPPT start up voltage is 150v. I have noticed that my system start to charge the battery when the solar voltage is around 125v. 330 x4= 1320 *0.8(for losses) = 1056W. Your inverter can handle 4500w. 330wx16x.8 = 4224w. (16x330=5280 but you will have cable losses as well as irradiance and temperature losses) You can have 8 panels in series and 2 strings in parallel total of 16x 330w panels Quote
Coulomb Posted February 4, 2021 Posted February 4, 2021 (edited) 20 hours ago, chrisyoung said: What is the minimum number of panels required to get the solar side working? My personal observation, without ever owning one of these, is that you need 6 panels as the practical minimum. If they are 72-cell panels (as most are these days), then you might get away with 5 panels. Edit: that's despite the fact that mathematically, it looks like 3 panels would be enough to at least get some production. Edited February 4, 2021 by Coulomb Quote
PeanuTG Posted February 9, 2021 Author Posted February 9, 2021 Thanks for the replies everyone. I have 72 cell panels. I will connect all 4 panels in series and see what the outcome is. Quote
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.