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BMV Midpoint


andrew9484
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Hello. 

I am using victrom 702 BMV and ICC windows. The BMV alarm is set at 2%. If i look at victronconnect the midpoint deviation is around 2%. in ICC it is 0.2%.

1. Where is the error likely to be - BMV config? or ICC?
2. What is reasonable % for midpoint deviation? it was usually around 0.02% on ICC (which would be 0.2% on victron); I suspect the increase is as result of the SOC (lowest i have been thus far).

Thanks

Andrew

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30 minutes ago, andrew9484 said:

I am using victrom 702 BMV and ICC windows. The BMV alarm is set at 2%. If i look at victronconnect the midpoint deviation is around 2%. in ICC it is 0.2%.

1. Where is the error likely to be - BMV config? or ICC?
2. What is reasonable % for midpoint deviation? it was usually around 0.02% on ICC (which would be 0.2% on victron); I suspect the increase is as result of the SOC (lowest i have been thus far).

I notice that you refer to VictronConnect and ICC, but have you checked the actual BMV702's display? The reading on the BMV's display would be the correct reading - if you compare that reading to the readings on VictronConnect and ICC you will know which one of the 2 software products displays the incorrect reading.

Your midpoint reading should be as close as possible to 0%. 0.2% is OK, 2% is not good.

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On 4/26/2017 at 8:03 AM, superdiy said:

Your midpoint reading should be as close as possible to 0%. 0.2% is OK, 2% is not good.

My batteries do 3.3% some days... I'm getting into that fun zone now. I'll keep you guys posted, I have my eye on a Lithium NMC bank. Still trying to decide if NMC or LiFePo4 is better. It's hard to find out what these things are really capable of.

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Made a mistake... I'm looking at NCA, not NMC. Nickel cobalt aluminium. Energy density is higher than lifepo4, cycle life and price is comparable. Anyway... Off topic :-)

Sent from my GT-I9195 using Tapatalk

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On 4/29/2017 at 1:11 PM, plonkster said:

Made a mistake... I'm looking at NCA, not NMC. Nickel cobalt aluminium. Energy density is higher than lifepo4, cycle life and price is comparable. Anyway... Off topic :-)

Sent from my GT-I9195 using Tapatalk
 

Please, keep us posted. 

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