PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world test.

[matt25]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

Awesome experiment, very well done. Great for mere mortals such as myself!

 

[danesol]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

Irrespective of second order effects, I feel that the OP should be applauded for running the test. As has been stated many times on every PV forum, data is only useful under real world conditions and under the same conditions. Placing arrays as you have is about as good as you can sensibly get. I see no issue with shading. Most of us have some. It will be interesting to see how the two panel types behave given the fact that their diode arrangements and bypass zones are totally different. I would like to see some form of dappled shading retained across the whole array as this is far more real world.

Indeed, I agree as in the olden days we had ppl like "WHICH" who use to do tests/comparisons of such nature..........

 

[PhilSouth]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

At face value, this appears to be a good experiment. If it was meant to be 100% scientific then it would be taking place in a lab! This is being done in the real world, in real life conditions so would be keen to see the results.
Part of the reason I have replied to this thread is so I can stay up to date with it but having tracked down the co-ordinates to somewhere around Tibenham, I am only about 6 miles away so the data would be very interesting from a local, personal point of view.

 

[Vegelen]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

I am currently monitoring 2 systems: Suntech v Sanyo Hits

Suntech monocrystaline panels are outperforming Sanyo Hits in low light conditions by 10-15%, but underperfoming significantly in bright conditions (40%).

After a "Burn in Period" The Suntech 250W are now performing better in low light conditions and very close to the efficiency of the Sanyo HITS in bright light conditions.

Moral of this story? Sanyo HITS are far more expensive, but dont outperform as much as they need to, to justify their economic outlay.
The Sanyo Hit panels are currently outperforming the monocrystalline Suntechs by 4-5%. They cost a 40-55% premium.

 

[SolarCity]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

After a "Burn in Period" The Suntech 250W are now performing better in low light conditions and very close to the efficiency of the Sanyo HITS in bright light conditions.

Moral of this story? Sanyo HITS are far more expensive, but dont outperform as much as they need to, to justify their economic outlay.
The Sanyo Hit panels are currently outperforming the monocrystalline Suntechs by 4-5%. They cost a 40-55% premium.

To be totally honest, I am a fan of Suntech panels but this just isn't good science. The Suntech panels are fitted at a better pitch (30 degrees) than the Sanyo system (45 degrees) and we know very little else about the systems.

The data suggests that both systems are south facing and unshaded - now we all know that if they are going by SAP calculations then zero shading doesn't exactly mean just that. We don't know how the inverters are mounted, how far the cable run is or pretty much anything else about it.

 

[Vegelen]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

Thor v Uxello Solar:

Ask questions and enter the debate....

Help me explain why the latest Suntech monocrystallines should be performing so well relative to Sanyo 250 HITS on 2 similar systems 10km apart.

The Suntech solar array with transformerless inverter was earthed on the 28th March 2012.

Since that date the 2 systems relative performance has narrowed.

 

[morpheus75]

Great experiment would love to hear how its all going over the course of the year(s) to come.


Sent from my iPhone using Tapatalk

 

[SolarCity]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

How can you be sure that they are in equal conditions?

 

[Vegelen]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

How can you be sure that they are in equal conditions?

The only way equal conditions can be found is by installing side by side.

Do you know a millionaire locally that will fund such an experiment?

I'd be happy to see the results.

I know what we'd find, that the Sanyo 250 HIT's generate marginally more than the

latest Suntech's. The Suntech STP250S - 20/Wd monocrystaline panels have a

module efficiency of 15.2% versus 18% on the Sanyo HIT-H250-E1.

The Sanyo HIT 240's are 19% and the latest Sunpowers at approximately 20-21%.

All are very much more expensive.

Economically they wouldn't be worth investing in over 25 years, unless maximising

solar power generation for a fixed size of roof, where panel size affected the amount

of panels that could be installed in a limited space.

Anyone with a commercial interest in installing Sanyo Hits would be likely to

challenge these results, as they have economic interests to protect.

Unfortunately I dont.

I care to find the best quality panel, outputting the most energy over 25 years, In

typical conditions that prevail in North West England.

If I lived in Greece with greater average sunshine another panel may be my panel of choice.

Some PV panels perform better in low light than others etc.

Some perform better in high light conditions and greater temperatures etc.

Choosing the right solar panel for your environment, depends on where you live, the

typical weather conditions that surround you, your size of roof and a few additional

factors, IMHO.

 

[SolarCity]

Re: PV Panel War: Sanyo v. Hengji. The ultimate side-by-side long-term, real-world t

The only way equal conditions can be found is by installing side by side.

Do you know a millionaire locally that will fund such an experiment?

I'd be happy to see the results.

As would I.

All I am saying is that to compare these two systems is not very good science, particularly when you understand just how much impact orientation, pitch and shading can have on a system.

To take these two systems and then to go and make a conclusion based on the results is not going to very accurate.