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clinophobic asked

BMV 712 Smart - Battery Settings

Hi all,

Can I start off by saying I am a beginner and any advice is welcome.

I am converting a van and have purchased the following victron products.

Victron BMV 712 Smart - Bluetooth

Multiplus 12/1600/70-16

Victron Energy Orion-Tr Smart 12/12-30A

I am setting up the BMV first.

I have a query about the settings that I should add in battery section of the app.

Specifically the settings below

Program Settings for AGM Batteries
• Battery Capacity: 220Ah
• Charged Voltage:
• Tail Current:
• Peukert Exponent:
• Charge Efficiency Factor

 I have sourced the batteries data sheet. Here

https://www.alpha-batteries.co.uk/230-ah-xplorer-agm-leisure-battery/#product-datasheet

Specifications:
• Nominal voltage: 12 V
• Rated capacity: 220 Ah (at C100)
• Separator: AGM
• Electrolyte: Sulphuric acid; analytical grade
• Self discharge: < 2.5% per month at 20°C
• Standards: IEC 61056; IEC 61427; IEC 60896
• Venting valve: One way, self resealing
• Degassing system: Central
• Terminal type: Top / Automotive
• Case / lid material: Polypropylene
• Carrying Handles: Available (2)

BATTERY CHARGE CONDITIONS
Constant current charge Current range: 0.1 – 0.2C10 A
Constant voltage charge Voltage range: 14.10 – 15.10 V (Recommended: 14.40 V)
Float voltage 13.62 V (2.27 Vpc) at 20 oC
Temperature correction factor Below 20 oC: + 0.018 V/block/oC; Above 20 oC: - 0.018 V/block/oC
Float application Recommended: max. 0.1C10 A / 13.62 V (2.27 Vpc)
Cycle applications Recommended: max. 0.2C10 A / 14.40 V (2.40 Vpc)
Recharge Ah: at least 105% from previous discharge Ah

Any advice on what settings I should add to the BMV would be very helpful.

Thanks

BMV Battery Monitor
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1 Answer
snoobler avatar image
snoobler answered ·

https://www.youtube.com/watch?v=4ReljfO3k6M


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clinophobic avatar image clinophobic commented ·

Thank you, do I take into account the DC to DC charger similar to the example given for solar chargers.


Thanks

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snoobler avatar image snoobler clinophobic commented ·

You want your battery monitor to be as accurate as possible. One thing you want to avoid is artificial synchronizations where the SoC jumps to 100% well before fully charged.

If you set your charged criteria for the DC-DC, solar charging can often trigger a false 100% sync. Nobody wants their battery monitor saying 100% when the battery might be notably lower.

IMHO, IF YOU USE SOLAR, you should configure to sync with solar. As long as you're charging to full a few times a month with solar, it should stay accurate. The DC-DC charging will be counted and contribute to SoC as well, and if properly configured, it may also properly sync.

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