Bug in Beta Firmware V1.53 for MPPT 100/50?

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p-rhodan asked Oct 7, '20

Bug in Beta Firmware V1.53 for MPPT 100/50?

Hi,

Just got a firmware update for the SmartSolar MPP 100/50 via the VictronConnect iOS Beta App. Now I have the V1.53 in use.

Got a high voltage alarm immediately. The solar charge controller went to a charge voltage of 15.21V for a few seconds!

Absorption voltage is set to 14,7V.

Also 14.05V is now used for floating, although 13.8V is defined in the battery type.

It is an AGM Spiral battery selected as type.

This can be repeated at any time by deactivating the charging function in the settings and activating it again after a short time.

After about 20-30 seconds the battery starts charging in bulk mode and the charge voltage is increased to over 15.2V for a short time. At about 14.9V the battery switches to absorption mode and then to floating with 14.05V.

With firmware V1.52 and older I did not have this behavior.

MPPT SmartSolar firmware update

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Modifications Space

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Answer 1 · 2020-10-07T10:44:08Z

mvader (Victron Energy) answered · Oct 07, 2020 at 10:44 AM

Hi @p-rhodan, thanks for the report - we’ll look into it. And contact you in case of any questions. For any co-readers, this new MPPT version is only available as part of the VictronConnect beta test program - no need to worry for any installs. Ps. I’ll move this post to modifications

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Answer 2 · 2020-11-08T10:09:00Z

p-rhodan answered · Nov 08, 2020 at 10:09 AM

@mvader (Victron Energy) For your information, after updating to firmware Version 1.54 the issue still exist.

For my AGM battery I use the following settings to get the following Voltage:

Setting in MPPT / measured voltage with SmartShunt

Absorption: 14,4V / Measured: 14,7V

Float: 13,5V / Measured: 13,8V

With V 1.52 I had not this difference.

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