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inhabor avatar image
inhabor asked

Why my MPPT is showing ESS instead of Bulk in the middle of a sunny day with the batteries at 60% charge?

MPPT ControllersESS
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JohnC avatar image
JohnC answered ·

Hi. This is likely to be because the mppt is not deciding it's own charge state, but feeding from another device which is telling it what to do. Ie. it doesn't know whether it's in Bulk or not, but is being decided by an external controller (eg CCGX or Battery BMS).

A recent firmware update altered that notification from "ESS" to "External Control", because it was confusing users who didn't have ESS installed.

Is this explanation relevant?, as we don't know your setup..

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inhabor avatar image inhabor commented ·

How can I fix this? Can I disable the ESS? The system is in a vehicle. It has a multiplus compact, MPPT and a CCGX

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