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Which micro inverter is more suitable? Balcony photovoltaic system

 
Solar Thermal & Power Diverters
Last Post by Mars 1 year ago
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 greenleaf
(@greenleaf)
Active Member Member
Joined: 2 years ago
Posts: 4
Topic starter 02/08/2023 7:46 am  

Hi everyone, I have a question and would like to hear your thoughts. I'm looking for a micro-inverter to be used in a balcony photovoltaic system, the system size is about 800W.

I looked for products from some big name manufacturers, I think Enphase's IQ7A model and apsystems' DS3D model are good. But the DS3D of apsystems seems to be suitable for the power system of 1800W, which is much higher than the power of the photovoltaic system on the balcony I planned. Will this affect anything?

In addition, I recently got information that the brand of photovoltaic panels I purchased, Maysun Solar, recently launched a new balcony photovoltaic product, using hoymiles micro-inverters. It just so happened that I noticed the hoymiles brand during my search, and the PV panel model I plan to use for the PV system is roughly the same model as the one in the new product. So I also want to know about the hoymiles HMS-400-1A model micro inverter.

Has anyone used the same model inverter? Are there any caveats or suggestions?

What do you think?


   
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 Prunus
(@prunus)
Estimable Member Member
Joined: 4 years ago
Posts: 62
25/08/2023 7:29 pm  

There shouldn’t be a problem using an inverter rated higher than your panel output. Maybe there will be a small efficiency loss at the low end (grey day in winter kind of thing), I don’t know.

 However it is also possible to go smaller than your rated panel size. Panels are typically rated for 1kW/m2 of sunlight which is roughly the sunlight you get at the equator. If the panels are at a different latitude or tilted then you get less. So an 800W inverter would capture the peak output of the panels, but much of the time the output is going to be less. If it is, a smaller inverter would miss out on the last few watts of peak generation but might be sufficient say 95% of the time.

 

 If you do the calculations for your site (I recommend Global Solar Atlas) you may find the actual output is much less than 800W and a smaller inverter will suit.

This post was modified 2 years ago 2 times by Prunus

   
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 Lenabc
(@lenabc)
New Member Member
Joined: 1 year ago
Posts: 1
23/01/2024 9:31 am  

Hi everyone, I am new to photovoltaic system installation, can you guys give me some advice.

Currently I plan to purchase a Maysun Solar 800W balcony photovoltaic system. By understanding the accessories information, I found that there is currently a lack of special input sockets matching the system and a professional two-way electricity meter.

Do you need to find professional installers to test and install these equipment? Are there any brand recommendations for related equipment?

Thank you everyone.


   
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Transparent
 Transparent
(@transparent)
Illustrious Member Moderator
Joined: 4 years ago
Posts: 2436
23/01/2024 12:13 pm  

@lenabc There's another topic about a balcony PV approach from a few months back.

@editor can we move the above comment across there so that the two respondents can communicate with each other more easily?

Save energy... recycle electrons!


   
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Mars
 Mars
(@editor)
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Joined: 4 years ago
Posts: 3361
23/01/2024 11:20 pm  

@lenabc as suggested by @transparent please see above.

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