question

tfage avatar image
tfage asked

Smart shunt settings

451d0a00-30ae-4ea5-a716-a9c3bef81ad5.pngI’m struggling to read/understand the smart shunt, any help is appreciated

It was recently installed along with 4 brand new 110ah sealed lead acid batteries (hankook xv110 dual purpose), then plugged into the mains to ensure 100% charge and synced.

Today it shows I’m at 91% SOC after using 62ah out of my 440, which I calculate as 86% SOC

However when my fridge starts and has been running for 10mins my volts drop to 12.34v, then with fridge off and for 5mins the volts jump back to 12.5v

So….. what reading should I be using?
Percentage seems wrong, Ah used doesn’t seem to match the voltage when in use.

I’m so confused? I don’t want to damage my brand new batteries?

***Batteries are charged by both solar and running the engine and currently battery temp is 5*c

ddeee8c7-f171-48dd-9e9b-6d8e6647b5fd.png

90de8b10-b6aa-4939-8b54-bed7fcaf1be8.png


SmartShunt
ddeee8c7-f171-48dd-9e9b-6d8e6647b5fd.png (332.0 KiB)
90de8b10-b6aa-4939-8b54-bed7fcaf1be8.png (330.8 KiB)
21a9304c-3ddc-454d-aacf-ae6bb84f9ac9.png (390.6 KiB)
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

2 Answers
tfage avatar image
tfage answered ·


730d0dc4-e68d-4cca-9b44-68cd4ead5ae0.png

These are my settings


730d0dc4-e68d-4cca-9b44-68cd4ead5ae0.png (353.1 KiB)
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

JohnC avatar image
JohnC answered ·

Hi @Tfage

The answer is, at least until you gain confidence, to use all your observations.

There's little things, like cold batts under light load not holding up V as much as you expect. But that's a reactivity thing that you'll learn to overlook in winter temps.

Rather than repeat myself, have a look at this fresh thread.. https://community.victronenergy.com/questions/116985/smartshunt-battery-settings.html?childToView=117130#comment-117130

But take care changing settings, you shouldn't do that unless you know why you're doing it. The manual is a good start, even if you have to read it over & over ad infinitum.

What you've described so far is normal, and your SOC reading shows typical behavior. You'll learn to believe it once you understand why, and have had a go at tuning. Try using the Trends graph too, can be fun changing Peukert and watching it recalculate the SOC curve.

But keep asking as you need..

8 comments
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Stefanie (Victron Energy Staff) avatar image Stefanie (Victron Energy Staff) ♦♦ commented ·

@JohnC Since SmartShunt settings is one of the most common questions here in the community, maybe someone can pin the linked thread at the top of the page. It's probably the best answer I've ever seen, and it's explained so clearly.

0 Likes 0 ·
Show more comments
tfage avatar image tfage commented ·

Thanks for your reply, Ive had a good read through the thread, watched the video and read the manual, you’re right in saying I may to do re-read again! So much information


I’ve made a few adjustments to the settings and I’m getting a more realistic SOC, the only thing I’m struggling with is the Peukert exponent as I can’t find any data on my batteries? ‘Hankook XV110’ I haven’t charged my batteries now for 5 days (apart from a few ah the solar has provided) and they still seem happy-ish. What would you suggest I set the Peukert too?


0 Likes 0 ·
27ee0a2c-b846-4c11-b774-b853122df249.png (352.1 KiB)
Show more comments