MPPT 75/10 Fault or Working correctly?

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Anthony asked Apr 19, '24

MPPT 75/10 Fault or Working correctly?

Hi, had my controller running for a few weeks and noticed the displayed battery voltage doesn't match the multimeter voltage at the batt terminals on the controller, the actual battery terminals nor the voltage displayed on my garmin chary plotter. The MPPT displays high 13v and everything else shows 12.4 or thereabouts. Here are some pics, it kinda looks like its not charging as zero amps on the solar side or battery. Is this normal or should I look at getting a replacement? BTW, using flooded LA batteries 2x80amp

MPPT Controllers battery charging

screenshot-2024-04-19-11-00-18-718-comvictronenerg.jpg (306.4 KiB)

screenshot-2024-04-19-11-03-29-777-comvictronenerg.jpg (300.4 KiB)

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Answer 1 · 2024-04-20T09:02:23Z

Alexandra answered · Apr 20 at 09:02 AM

@AnthonyExmouth

Did you check the fuse? If you disconnect solar does the mppt switch off?

Does the voltage at the battery terminals change when pv is disconnected?

If you have done the pre rma tests and it failed then it is time to return it. Give good details & pictures about the install.

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Anthony commented · Apr 20 at 09:49 AM

It was the fuse. Didn't think of checking it as the app was showing voltage on all ports. Shame there's no indication on there if the fuse blows. Cheers.

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