Panels for 5 Kw Sunsynk

[AchmatK]

So what is the maximum number of panels I can have per string please?

I wouldn't go with not than 9 of these 460w panels per MPPT

 

[Die Uwe]

Max panels per string is based on voltage, so multiply, as long as it's under 425 you're OK.

And do I use VOC for that?

 

[AchmatK]

And do I use VOC for that?

Correct.

But they normally look at STC which you are ideal conditions which you most likely will not achieve.

 

[Die Uwe]

Thanks everyone. I appreciate the input. I will get another installer to do it, even if I need to pay a bit more for their traveling expenses. Just for the peace of mind.

 

[TheChamp]

Max panels per string is based on voltage, so multiply, as long as it's under 425 you're OK.

425V is the max for mppt range, beyond that you lose efficiency but no smoke as yet, beyond 500V that's where the trouble happens.

 

[AchmatK]

Thanks everyone. I appreciate the input. I will get another installer to do it, even if I need to pay a bit more for their traveling expenses. Just for the peace of mind.

It really isn't rocket science and if he is competent with other installs I would maybe look at helping him understanding the inverter better.

I had the same issue when looking for an installer. I ended up just going with an electrician I found on Facebook but I already knew exactly how I wanted the 8kw sunsynk inverter weird.

He was uncertain that the inverter can do what I said it would. I told him to connect it like I'm asking and I'll show him what this inverter can do. Now he does a few sunsynk installs and contacts me a couple of times per year if he gets stuck with a complex setup.

I think having had his first sunsynk install behind him did help to get him more installations using sunsynk inverters.

 

[Mzezman]

Yeah - its a tricky one with the installers - so many brands and system designs - it can be hard to keep up.

You will be fine with those panels if you split them across the 2 MPPTs - you probably could even do 7/8 panels per MPPT without stressing too much (for expansion purposes)

 

[Die Uwe]

It really isn't rocket science and if he is competent with other installs I would maybe look at helping him understanding the inverter better.

I had the same issue when looking for an installer. I ended up just going with an electrician I found on Facebook but I already knew exactly how I wanted the 8kw sunsynk inverter weird.

He was uncertain that the inverter can do what I said it would. I told him to connect it like I'm asking and I'll show him what this inverter can do. Now he does a few sunsynk installs and contacts me a couple of times per year if he gets stuck with a complex setup.

I think having had his first sunsynk install behind him did help to get him more installations using sunsynk inverters.

The problem is before buying from Steve this installer quoted me on a sunsynk(R2500 more expensive then Steve), Revov 5.2kw battery and 16 x 330W panels. I dont think this would be his 1st sunsynk installation.

 

[ADrunkTeddyBear]

I wouldn't go with not than 9 of these 460w panels per MPPT

To be safe, I usually keep it at 8 panels per string on the JA Solar 4XXW series of panels

 

[ADrunkTeddyBear]

The problem is before buying from Steve this installer quoted me on a sunsynk(R2500 more expensive then Steve), Revov 5.2kw battery and 16 x 330W panels. I dont think this would be his 1st sunsynk installation.

If you do need help with anything. You can PM @DuracellBunny. He helped me a lot with my system and some settings here and there as well as planning Phase 2 and Phase 3 of my system

 

[Die Uwe]

so after replying with 2 strings of 6 each, each string to its own mppt the installer contacted me now and said he read 12460w and not 12 x 460w

 

[1am7h30n3]

Hahaha! Yeah that sounds like just a simple misunderstanding.

 

[RonSwanson]

Hi all

So I bought a 5kw Sunsynk, 2 x 5.5kw Hubbles and 12 x 460w JA panels from Steve.

Asking the local solar installer to come and install it he asked me why so many panels, the inverter cant handle that.

Have I not been doing the calculations correctly?

Please help

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View attachment 1271582

I have just ordered a 5K Sunsynk, 3x Hubble AM-2s and 14x 460W panels yesterday from Powerforumstore, for another family member's installation.
It sounds to me like your installer has never installed a Sunsynk before.
There are many Master, Approved and Registered installers available here.

 

[RonSwanson]

The only thing I see is that the max mppt current is 11A but you panels can produce more than 11A, don't know how the inverter will handle that as its not a big margin.

Coming back to the installer, I would drop him like a hot cake, the inverter is clearly rated for more power and your panels are lower than that.

That's increased to 13A, since yonks ago.

 

[RonSwanson]

The MPPT clips the incoming current automatically. How it does this I have no idea.

It cannot do the same for voltage.

By adding resistance. I=V/R

 

[RonSwanson]

No not really

A MPPT is basically a DC- DC converter.

Obviously you can't exceed the maximum voltage but it can control the voltage and current as required for optimal power generation from the solar panels

Yes I simplified it, but the principle is the same. It is easy to play with current, no so easy with voltage.

 

[semaphore]

Hi all

So I bought a 5kw Sunsynk, 2 x 5.5kw Hubbles and 12 x 460w JA panels from Steve.

Asking the local solar installer to come and install it he asked me why so many panels, the inverter cant handle that.

Have I not been doing the calculations correctly?

Please help

View attachment 1271580
View attachment 1271582

Get a different installer.

 

[Snyper564]

Get a different installer.

his only installer in 200km radius

 

[Die Uwe]

Finally the day is here.

 

[ADrunkTeddyBear]

Finally the day is here.
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Post pictures as they come along!