question

lemonq avatar image
lemonq asked

SmartSolar MPPT 150/70 never starts charging - setting wrong?

I set up a new system 3 weeks ago with The 1000 W of PV, and bank of 1400 Ah LiFePO4 batteries. I have set up other systems in the past, but this is my 1st experience with Victron. 3 weeks later I returned to my cabin in the woods, and the batteries are low, and the Victron has stayed in bulk mode with a flashing blue light, and never charged the batteries. What's wrong here? North AZ, good daylight every day.

Why is the Victron flashing blue and not charging? That is my question.

Picture from first day setup:

screenshot-20210516-144901.jpg


Right now (early morning, low light)

screenshot-20210603-064753.jpg


And the BMV712 monitor shows today:

screenshot-20210603-070232.jpg


screenshot-20210603-070216.jpg


screenshot-20210603-070333.jpg



MPPT Controllers
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2 Answers
Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

What is in the history of the MPPT?

For me it looks like the Shunt is not wired correctly.
Do you have a wiring diagram or some pictures of your wiring.

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shreeyash avatar image
shreeyash answered ·

Hi @lemonq,


1. could you please check the battery type is select as Lifepo4 for Mppt?

2. Setting for BMV712 seems to be incorrect. Make changes as per below values

Battery Capacity: 1400Ah

Charged voltage: 14.6V

Discharged floor: 0%

Peukert exponent: 1.01

Charge efficiency: 99


charge this battery to 100% and then select “synchronise SOC to 100%”


Also check you have similar settings for battery on mppt as well


Best,

Shreeyash

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