Posted February 5, 20223 yr Good day all. Does anyone know how much solar you can add to each PV string on a 8.8kW Sunsync inverter. The manual specifies 10400W total PV but does that mean max power per string is 5200W? If you look at max voltage and current per string you should be able to go much higher on on string than the other. The reason I ask is because I have a single solar array but when I change inverters I will add another on a different part of roof. The current array is only 3000W
February 5, 20223 yr Author Cool, thx Suly. I notice your total panels add up to more than the 10400W, again I assume its fine as long as as you do not exceed the 450V and 18A per string and any given time.
February 5, 20223 yr 4 minutes ago, Vijen said: Cool, thx Suly. I notice your total panels add up to more than the 10400W, again I assume its fine as long as as you do not exceed the 450V and 18A per string and any given time. The mppts can now do 20 amp or 22 amp not sure. The inverter will clip the amps down if you max it out so its not crazy important,just make sure to keep the VOC of a string to about 450-480 max thats the most important.
February 6, 20223 yr @Vijen If you remain within the maximum settings on both MPPTS, you are able to maximise solar generation by typically mounting one string of panels (near max capacity) facing East and another facing West, suitably angled to reach (about or slightly over) optimum capacity between the two at noon. This will allow earlier solar generation, a high level compromise during the day as you transition primary feed from East to West string, and longer generation toward sunset, when others with flatter, North-facing panels have almost reduced input current to a mere trickle. The physical (roof location, angle and weather) and economic constraints (cost vs benefit) often dictate where to find the balance.
February 6, 20223 yr Maximum solar DC power the inverter can generate is 10400W according to the spec. I have 12,740w of panels in an East/West Split. The inverter can never generate more than 10400W of DC power & 8800W of AC Power As panels are comparatively cheap, the aim of having extra panels is to have sufficient power on more borderline days to make the households requirements, which it does very well generating more than 40kw/hr on more than 77 of the last 90 days. Maximum single day production was 65Kw/hr but this number is restricted more by the amount of power that we can use rather than the amount it can generate.
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