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CR6 Uninterruptible Power Supply: Solar Panel directly to CR6 or solar charge controller

fluckste May 26, 2019 04:06 AM


I plan on deploying a CR6 with a Sonic Anemometer in the field for a month. For power Supply, I have a lead acid battery, a solar panel and a solar charge controller. Reading the manual of the cr6, I could also simply hook up the battery to the BAT terminal and the solar panel to the CHG terminal. On the other hand, I could hook up my battery and the solar panel to the solar charge controller, and that one to the BAT terminal. 
Is there a difference, will my dedicated solar charge controller be more efficient than the CR6, do I lose any functions with either method?

Kind wishes and thank you!

smile May 27, 2019 09:40 AM


The first step is to check the maximum current that the controller inside the logger can control.

This is related to your photovoltaic module and battery.

As for efficiency, I believe I haven't read anything in the logger's manual.


fluckste May 28, 2019 02:05 AM

Hi, thanks for your answer! 

Ok, well with my panel 50W and battery (90Ah) being quite large, I guess I'll be using the dedicated solar charge controller then.



smile May 28, 2019 08:53 AM


Ok I read in the manual that the internal charger in the logger can control up to 1.2A at 20°C, so it is better to use an external charger.


david056 Jun 5, 2021 04:14 AM

Whats the major difference between internal and external charges? Any priority of using these ?

david056 Jun 8, 2021 03:32 AM

This post is under review.

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