May 28, 20242 yr Hi guys looking for some advice we live on a farm with no eskom in sight newly buildt house paralleling 2x 10kw kodak inverters in summertime the panels were sufficient but now in winter we are struggling to get the batteries fully charged we added on panels so we are currently running 20 panels per inverter 5s2p/ mppt perfect within the inverter input voltage. but when summer comes and the panels perform better we will be in excess of around 1000w will the inverters just draw what they can handle or will they have problems because of the oversized pv array please keep in mind we are not pushing over voltages only the wattage is more than the mppt’s are rated Edited May 28, 20242 yr by Bronwynn
May 28, 20242 yr 33 minutes ago, Bronwynn said: we added on panels so we are currently running 20 panels per inverter What is the specs on the panels?, the mppt's can accept 10kwp of solar input 5kwp/ mppt. 90~450v dc input startup voltage of mppt around 120vdc, 18A/mppt. So between the 2 x 10kw inverters you can have 20kwp solar array between the 4 mppt's. If you have 1000w/ inverter access power during summer that will not be a problem. Edited May 28, 20242 yr by TaliaB
May 28, 20242 yr Author Panels are 570w ja panels during summer we get around 520w per panel we want to change the strings to 12 panels per mppt. For cloudy days. so we will have 6200w per mppt in summer where the inverters mppts are only rated at 5000w so its around 2400w between the two inverters over the rated 5kw mppts. will they clip the power and only take 5kw? Without damage?
May 28, 20242 yr 40 minutes ago, Bronwynn said: Panels are 570w ja panels during summer we get around 520w per panel we want to change the strings to 12 panels per mppt. For cloudy days. so we will have 6200w per mppt in summer where the inverters mppts are only rated at 5000w so its around 2400w between the two inverters over the rated 5kw mppts. will they clip the power and only take 5kw? Without damage? I was under impression that you had the Kodak OG- 10.0 where the inverter is rated at 10kwp input. Yes it will be ok i normally do maximum power input rating as 5kwp x 1.25 = 6.25kwp.
May 28, 20242 yr Author I do have them yes 2 of them. Total panels on one of the og10 kw is 24 after the upgrade. So they will be ok? With the excess power?
May 28, 20242 yr Author They have 2mmpts each rated at 5000w where they will have 6200w of panels per mppt so in total 12400kw of panels per og-10
May 28, 20242 yr 2 minutes ago, Bronwynn said: They have 2mmpts each rated at 5000w where they will have 6200w of panels per mppt so in total 12400kw of panels per og-10 Yep they will clip the access power 10kw x 1.25 = 12.5kwp/ og-10
May 28, 20242 yr 1 hour ago, Bronwynn said: Panels are 570w ja panels during summer we get around 520w per panel we want to change the strings to 12 panels per mppt. For cloudy days. so we will have 6200w per mppt in summer where the inverters mppts are only rated at 5000w so its around 2400w between the two inverters over the rated 5kw mppts. will they clip the power and only take 5kw? Without damage? You will have a problem with the Voc input if you are using JA 570w the Voc/panel is 51v x 12 = 612v way above the 450v input. I will only do 9S on these panels. Edited May 28, 20242 yr by TaliaB
May 29, 20242 yr 2 hours ago, Bronwynn said: Im running 6s2p per mppt way below max voltage Yes sorry you said that earlier. You have been running at 5s2p upgrading to 6s2p you will have the same current through the mppt's at a slightly higher voltage. If it has been working on 5s2p it should be ok on 6s2p.
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