Connecting different types of solar panels together

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Discussion Overview

The discussion revolves around the feasibility and implications of connecting different types of solar panels with varying voltage ratings in series. Participants explore potential side effects, safety concerns, and operational efficiency related to this practice.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant suggests that connecting solar panels with different voltages may lead to issues with current, as the lowest voltage panel could limit the overall current.
  • Another participant raises a concern about overheating if the current exceeds what a cell is designed to handle, referencing the use of diodes in multiple panel arrays to mitigate shading issues.
  • A later reply warns against connecting panels with different voltage ratings in series, indicating that it could result in uneven energy production and potential damage to the panels.
  • Some participants propose that all panels in a series should ideally have the same voltage rating for safe and efficient operation.

Areas of Agreement / Disagreement

Participants express differing views on the safety and advisability of connecting solar panels with different voltage ratings in series. There is no consensus on the best approach, with some advocating for caution and others suggesting that it may be feasible under certain conditions.

Contextual Notes

Limitations include assumptions about panel compatibility, potential for overheating, and the impact of current limitations based on the lowest voltage panel. The discussion does not resolve these technical concerns.

ramonegumpert
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Dear Experts

I like to check with you , if I have 3 solar panels : 3v polycrystaline, 0.5v monocrystaline and other types of solar panel at 12v, and I connect them in series. Any side effects? Is it not advisable?

I am assuming that there will be no problem and all the voltages will just add up without any problem.

Please advise. Thank you very much.


Warm regards
Ramone
 
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Mostly they just add. There can be issues with current however where the lowest capacitor cell defines the maximum current of all of them together.
 
Thanks Jsgruszynski :).

Interesting nick, by the way ;)
 
I believe there could be an issue. If you try to pass more current than a cell is designed for then won't you get over-heating?
On multiple panel PV arrays they put diodes across each unit so that it will still pass current even if it's shaded. This sounds like a similar thing.
 


Dear Ramone,

Connecting different types of solar panels together can potentially have some side effects. It is not advisable to connect solar panels with different voltage ratings in series, as it can lead to uneven energy production and potentially damage the panels. This is because the panels with higher voltage ratings will try to push more current through the panels with lower voltage ratings, which can cause them to overheat and potentially fail.

It is important to ensure that all the panels in a series have the same voltage rating to ensure safe and efficient operation. If you want to connect different types of panels together, it would be best to do so in separate circuits rather than in series.

I would also recommend consulting with a solar energy expert or referring to the manufacturer's guidelines to ensure that the panels are compatible and can be safely connected together.

Thank you for your question and best of luck with your solar energy endeavors.

Sincerely,
 

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