Solar panel open circuit in bright sunlight?

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treez

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If a solar panel is open circuit and the sun shines, then what happens to the charge generated, does it charge up and up and blow up the solar panel?
 

If the solar panel has no load (then it supplies no current) then in the sunshine its voltage rises to its maximum and nothing happens.
The voltage of a "12V" solar panel will rise to about 18V with no load. Its maximum current is into a short circuit. It is most efficient supplying voltage and current at the same time (power).
 
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Thanks,
We have an SPP30-12 solar panel (datasheet below) whose output is boosted up to 30V and then this is fed to a buck battery charger. (battery is 24V)
Will it be OK for us to simply use an input-current-regulated boost converter (in constant off time mode) and set its input current to 1.72Amps, and then just let it transfer energy to its output, where the buck battery charger will use the energy to charge the battery?
(1.72A is the “max power current” level of the solar panel)
Victron SPP30-12 Solar panel datasheet:-
https://www.es-store.co.uk/documents/product/Polycrystalline-Panels-EN.pdf

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Will it be OK for us to simply use an input-current-regulated boost converter (in constant off time mode) and set its input current to 1.72Amps.
Click to expand...
Unlikely. It will make the solar panel voltage collapse at lower irradition. Input voltage regulated would give better performance, MPPT or at least predefined I/V characteristic is suggested.

You need to look the full characteristic, not just maximum power point for nominal irradition.
 

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