Kobus680718 Posted October 28, 2020 Share Posted October 28, 2020 How many 330w solar panels can I connect to my system. My system contains of; 2 x 5Kva Expert Inverters, 10 x 3.5Kva Pylon-tech batteries, currently I have 18 x 330w panels. My problem is I do not get enough charge to fill my batteries. I started off with 6 x batteries and added 4 extra batteries due to running out of power, I am completely of grid. Any help would be appreciated. What settings do I need to change on my inverters Quote Link to comment Share on other sites More sharing options...
Bloubul7 Posted October 28, 2020 Share Posted October 28, 2020 It depends on which model Axpert unit you have. The 5kVa units typically range between 4,000w and 4,500w. So in theory you could install 8kw to 9kw worth of PV panels combined for your 2 units. So could add another 8x 330w panels Quote Link to comment Share on other sites More sharing options...
SYC Posted October 28, 2020 Share Posted October 28, 2020 46 minutes ago, Kobus680718 said: 3.5Kva Pylon-tech batteries, Each 3.5 pylontech recommended charge current 37A x 10 = 370A/2 inverters = 185 per/inverter (depending on which Axpert you have to will set charge cuurent accordingly) Quote Link to comment Share on other sites More sharing options...
Bloubul7 Posted October 28, 2020 Share Posted October 28, 2020 48 minutes ago, Quwatush Shams (Suly) said: Each 3.5 pylontech recommended charge current 37A x 10 = 370A/2 inverters = 185 per/inverter (depending on which Axpert you have to will set charge cuurent accordingly) I guess you missed his question, the OP ask how many panels can he connect to the 2x 5kVa Axpert units. Also typically the Axperts are limited to 80a each solar charge to batteries Quote Link to comment Share on other sites More sharing options...
MockTurtle Posted October 28, 2020 Share Posted October 28, 2020 (edited) that's a lot of storage... will probably need to add more inverters too? edit: currently i also use 12x330wpanels and 2x axperts. i think the max i can have is 12 panels on an inverter? currently only using the one inverter for solar input. but then i only have 14.8kWh batteries. Edited October 28, 2020 by MockTurtle Quote Link to comment Share on other sites More sharing options...
SYC Posted October 28, 2020 Share Posted October 28, 2020 (edited) 45 minutes ago, Bloubul7 said: Also typically the Axperts are limited to 80a each solar charge to batteries The Axpert king goes upto 140A on PV charging current 42 minutes ago, MockTurtle said: will probably need to add more inverters too? Correct Edited October 28, 2020 by Quwatush Shams (Suly) Quote Link to comment Share on other sites More sharing options...
SYC Posted October 28, 2020 Share Posted October 28, 2020 (edited) 2 hours ago, Kobus680718 said: What settings do I need to change on my inverters @Bloubul7 No you answered the first and I answered the second... Edited October 28, 2020 by Quwatush Shams (Suly) Quote Link to comment Share on other sites More sharing options...
SYC Posted October 28, 2020 Share Posted October 28, 2020 (edited) @Kobus680718 panels should be connected in 2S6P per inverter not 3 in series Edited October 28, 2020 by Quwatush Shams (Suly) Quote Link to comment Share on other sites More sharing options...
Calvin Posted October 29, 2020 Share Posted October 29, 2020 11 hours ago, Quwatush Shams (Suly) said: The Axpert king goes upto 140A on PV charging current Actually, it goes up to 80A PV charging plus 60A AC charging. Quote Link to comment Share on other sites More sharing options...
Bloubul7 Posted October 29, 2020 Share Posted October 29, 2020 (edited) 35 minutes ago, Calvin said: Actually, it goes up to 80A PV charging plus 60A AC charging. Correct, There are no ways in which the Inverter can get more than 80A charging from PV due to the 4000w limit on the MPPT side Edited October 29, 2020 by Bloubul7 Quote Link to comment Share on other sites More sharing options...
Yellow Measure Posted October 29, 2020 Share Posted October 29, 2020 15 hours ago, Kobus680718 said: How many 330w solar panels can I connect to my system. A good string sizing guide here. SYC 1 Quote Link to comment Share on other sites More sharing options...
Krokkedil Posted October 29, 2020 Share Posted October 29, 2020 Depending on what inverters you have, low voltage up to 115v or high voltage up to 400v. On the low voltage one run the panels in 2s8p in other words 16 panels per inverter =5280W at 80% efficiency(cable and shading losses) it will be 4224W x2 = 8448w Depending on what panels you run 40v x 2 =80v. 8448w/80v 105A/2 = 52 A per inverter. 8448*5hours=42240w These are rough estimates. I have 12 panels connected to my 3kw system and generate average 10kwh per day my battery is a 6kw lithium and it is fully charged around 12. Quote Link to comment Share on other sites More sharing options...
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