AC500 and solar panels

hi there i have just purchased an AC500 with b300s batterie and looking to buy some Solar Panels

, i just found those 545w bifacial panels in great price and i want to use the maximum
https://www.das-solar.com/uploads/Datasheet%20-%20DAS-DH144PA-xxx%20(530-555).pdf

watt:545w
voc:49.68
vmp:41.83
lsc: 13.91

and i want to ask the following
the AC500 says pv input 15A 3000w 150v

but says in the manual
make sure your panels AT EACH input comply with :OC٨12-150v vmp3:12-150v Power:1500wmax

so can i buy 6 panels?
and connect 3 of them is series? and then connect to the 1st input of the ac500

and then connect the other 3panels in series and connect them also to the 2nd input?

or is it better to buy 4 of them 2+2 in series would be safer?

can u check the pdf and tell me if im within limits?

Hi @sneekpeek !

With a Voc of 49,68V per panel, you would stay under 150V by 1V. There is one thing to keep in mind. The voc is measured under certain circumstances. In most cases they test them in 25 degress celcius. If its colder than that, the voltage can be higher than 49.68V. The data sheet should mentioned the voltage behavior. In your case (-0.260%/℃) that over 25 degress.

This could lead to overvoltage.

With 2 + 2 you definetly more safe.

greetings
Erik

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I have 4 Renogy 550W bifacial panels (they only come in pairs.) Three of them in series are for one of the 1500W inputs to my AC500. The 4th one goes straight into one of my B300s batteries (plugs into the side PV input.)
They get around 1470W on average. The theoretical Wattage is 1650 but you’ll never see that due to inefficiencies of solar panels. They ALL fall short of the advertised wattage.
You will need to mount bifacials where the back side gets a fair amount of reflected light, so they aren’t much good for mounting flat on rooftops.
.

My main array consists of 18 100W Renogy panels, wired in 3 strings of 6 panels. That gets me as close to the 1500W input as possible, (even though the theoretical is 1800W.)
.
The main trick is to get as close to the 150 VOC limit as you can without hitting it. Excess wattage/amps are okay and will help squeeze out more power on cloudy/rainy days.

2 Likes

so i can plug safely 2 panels in one string in series and another 2 panels on the second string2 in series

like this in the photo? with the specs i mentioned above?

Yes @sneekpeek , 1 pair per string is totally fine. You could connect one panel per B300S too, to archive 6 Panels.

So make 2 seriel pairs where one pair connect to DC1 and the other pair connect to DC2 and then have two single Solar panels where Panel 1 connect to B300S 1 and Panel 2 connect to B300S 2

GREAT! thanks for the quick reply, now i have to figure out the cabling specs its 25meters or 80ft give and take from the panels to the AC500, so in the forums i searched 6mm² at 10 awg and higher could do the trick