question

Marco Meile avatar image
Marco Meile asked

SmartSolar Temperature Compensation changes voltage in the wrong direction

Hi all,


i'am using a SmartSolar MPPT 100/30 with firmware 1.54 and a external ve.net temperature sensor.

When setting the temp. compensation to -30mV, on temperature below 25c, in my case 18c, the voltage is lowered from 29,4V to ~29,25V instead of 29,55V.

When setting the compensation to 30mV (plus) it works as expected.

Is this a bug?


Thanks so far


Marco


MPPT Controllerstemperature compensation
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saskak avatar image saskak commented ·

I know it is an old thread, but I am seeing the exact same thing with my smart solar 100/40 ver 1.61 (latest version), but it does not seemed to have been answered here. I posted my question/experience here: https://community.victronenergy.com/questions/225175/smart-solar-mppt-temperature-compensation-flipped.html

Hopefully there will be someone answering any of these.

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6 Answers
Marco Meile avatar image
Marco Meile answered ·

pushing the bug up again

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michelg avatar image
michelg answered ·

Hi Marco, just let 30mV without sign, the mppt should adapt to the needs.

Michel

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Marco Meile avatar image Marco Meile commented ·

but how can that be the solution if is simply wrong. this leads into damaged batteries and must be fixed!

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Marco Meile avatar image
Marco Meile answered ·

hey victron people, whats up?

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dan avatar image dan commented ·

Hi, so have u a fix for this.

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wanek avatar image
wanek answered ·

hello!


did anyone can give a proper answer for this issue?

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tomas-arthuzzi avatar image
tomas-arthuzzi answered ·

Anyone from Victron will ever respond this?


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vedasdoo avatar image
vedasdoo answered ·

Hi all,

Indeed, nothing has changed in terms of temperature compensation, despite the new FW ver. 1.63.

I have checked it thoroughly this time. As somebody stated before, put the numbers without "-" sign.

I believe it works well with "-" sign in case you have remote BVM device installed, but I do not need it in my application.


More important is how you set other critical parameters in your system.

Please, read this comment:

https://community.victronenergy.com/comments/240659/view.html

Regards

Marin

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Related Resources

MPPT Product Page

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MPPT 150/60 up to 250/70 Manual

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