Good day all

 

Just a quick question Ive noticed on the sunsync 5kw onverter it says dat max pv input current is 11A.

 

Dies this mean That i cant Install 650W panels on the sunsync inverter as the panel Amp shows 17A on STC and 13.7A on NMOT?

 

Kind regards

6 minutes ago, Be4dawn said:

Good day all

 

Just a quick question Ive noticed on the sunsync 5kw onverter it says dat max pv input current is 11A.

 

Dies this mean That i cant Install 650W panels on the sunsync inverter as the panel Amp shows 17A on STC and 13.7A on NMOT?

 

Kind regards

That is correct it is too much current , the 5kw Sunsynk has 13 amp mppt's so try find a panel under that.

Did They upgrade it recently?The specsheet im looking at still shows 11A?

 

Would you advise we work on the STC or NMOT Sheet for South African conditions?

55 minutes ago, Be4dawn said:

Did They upgrade it recently?The specsheet im looking at still shows 11A?

 

Would you advise we work on the STC or NMOT Sheet for South African conditions?

Work on STC as during cloud edge panels can give close to maximum for a few minutes. Normal output about 80% of STC.

Some members found the Synsynk becoming unstable when pushing it to the limit on current.

As indicated rather find panels with a lower than max current. You have a big voltage range to use when using higher voltage panels at a lower current for the same PV power.

Edited March 10, 20224 yr by Scorp007

@Be4dawn those 650W Canadian panels are more suitable for the 8kW SunSynks Rather find panel model as close as possible to 13A for the 5kW inverter.

Yes I wil definitely look at smaller panels.

When did they upgrade it to 13A? the specsheet I got only shows 11A.

23 minutes ago, Be4dawn said:

Yes I wil definitely look at smaller panels.

When did they upgrade it to 13A? the specsheet I got only shows 11A.

Apparently, it’s been confirmed by forum users that it’s 13A but for some reason SunSynk hasn’t updated their documentation. You can give the local SunSynk office in Randburg a call to confirm. 

Yep I will do that tommorow. Would be nice if its bunoed up to 13A. 

On 2022/03/10 at 9:06 PM, PowerUser said:

Apparently, it’s been confirmed by forum users that it’s 13A but for some reason SunSynk hasn’t updated their documentation. You can give the local SunSynk office in Randburg a call to confirm. 

But there are also forum members that confirmed as per data from Sunsynk that the 5kw might only receive a value just below 13A.

I have. 540 watt JaSolar panels on my 5kW Sunsynk and have recorded 12.94 amps with no clipping

On 2022/03/15 at 4:01 AM, Tariq said:

I have. 540 watt JaSolar panels on my 5kW Sunsynk and have recorded 12.94 amps with no clipping

Please explain clipping. I would like to put 4x 545 panels in parallel with 4 x545 panels  to stay within the maximun voltage per mppt 

Thanks 

9 minutes ago, bushgnome said:

Please explain clipping. I would like to put 4x 545 panels in parallel with 4 x545 panels  to stay within the maximun voltage per mppt 

Thanks 

Hi there , You cannot parallel panels on the Sunsynk inverters unless they are very small. You can put all those panels in series on one MPPT no problem. Which panels are those? 

19 minutes ago, bushgnome said:

Please explain clipping. I would like to put 4x 545 panels in parallel with 4 x545 panels  to stay within the maximun voltage per mppt 

Thanks 

Clipping is when the inverter throttles the current flow of the panel to prevent overload. The 5kW Sunsynk can take 13A on each MPPT.

If you put a 13A panel onto the 13A MPPT, there should be no clipping, because the inverter can handle the current inflow.

If you add for example a 17A panel, the  current is reduced to max 13A, and the power production is reduced by 23%, but the inverter should not be damaged.

If you put two strings of 13A panels in parallel, the total 26A line input will be throttled to 13A, and the loss of power will be greater, basically 50% foregone production.

You can rather put minimum 4 x 540W panels (each approx 49.9Voc, 42.2Vmp, Imp 13A) in series on each MPPT, or else all 8 on one MPPT without exceeding the input Voltage or input current.

Is there no point on a SS where if the current is way too much like 30A into a 13A MPPT input where the inverter will sense it and just switch off? 

14 minutes ago, Scorp007 said:

Is there no point on a SS where if the current is way too much like 30A into a 13A MPPT input where the inverter will sense it and just switch off? 

That's the limit on a 5kW inverter, 13A per MPPT, which basically restricts you to a single string of suitably-sized panels. I mean, if you are adding panels at the typical input Voltage, say 380V, theoretically 30A, that's over 11kW input,  and clearly exceeding what the 5kW inverter is designed to handle. It's I wouldn't worry to exceed the current rating by a small amount, but in general you should select the panel configuration to more or less match the input parameters of the inverter. Normally folks advise about not exceeding the Voltage parameters because that's typically very easy to do with just two or three panels too many in the string, but there's also an ultimate limit of maximum Isc that the inverter is rated for, that you shouldn't exceed. 30A is too much.

34 minutes ago, Scorp007 said:

Is there no point on a SS where if the current is way too much like 30A into a 13A MPPT input where the inverter will sense it and just switch off? 

i think its around 17-18A if i remember correctly . Donno if it will switch off but it may go up in smoke lol

45 minutes ago, Nexuss said:

i think its around 17-18A if i remember correctly . Donno if it will switch off but it may go up in smoke lol

Smoke.... Bad design then 😜I know of one make that would switch off without smoke. I just asked the question as we normally refer to throttling. 

A point around panels. We are used to have big roofs but a lot of countries might be using a lot of smaller panels as it might be the only option on their roofs. Smaller town houses might also be done with smaller panels. 

A friend recently reminded me that small panels like mine 270W are not in fashion 😂 They happen to be 10% below my 2 inverter maximum current. I won't be changing these 2 Inverters soon.