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deangi asked

ESS - MPPT not reducing demand on batteries

I have setup an ESS system with a battery and MPPT controller. Grid is turned off.

If I turn off the MPPT, the output of the battery does not change. Surely it should be discharging at a lesser ampage when the MPPT is producing power?

Thanks

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Matthias Lange - DE avatar image Matthias Lange - DE ♦ commented ·
What batteries do you have?

What other components are in the system?

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deangi avatar image deangi Matthias Lange - DE ♦ commented ·
Currently, for testing, it is a 100ah AGM. Waiting for Lithium to turn up. Thanks.
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klim8skeptic avatar image klim8skeptic ♦ commented ·
Is the mppt on the battery side of the shunt?
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deangi avatar image deangi klim8skeptic ♦ commented ·
No shunt in system at the moment. I understood this was not a requirement. Am I incorrect?


Thanks

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basil katakuzinos avatar image basil katakuzinos deangi commented ·
From my understanding many of those values will be "Calculated" and not exact, especially without a shunt or BMS communicating with your GX device or inverter. If you can see watts coming into your system from the MPPT, I would not be too worried.
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deangi avatar image deangi basil katakuzinos commented ·
Thanks for that.

I will get a shunt put into the system anyway and wait for the lithium battery to turn up before further testing.

All the best.

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