Victron VE comunication

[the1andonly]

For those that use Victron measuring equipment eg BMV smartshunt or VE Direct, what do you actualy take note of or measure.
Im thinking
SOC
V Voltage
VS starter battery
H17 Amount of discharged energy
H18 Amount of charged energy
Relay condition (on/ off , i use this to control relay to allow charging of Li battery).
I am playing with an arduino Mega and initially got variable results but finding a library for BMV700 made life a lot easier. a bit of messing about and i can get what i want out of a BMV712. I cant do anything with my MPPT controllers yet (they are Votronic and currently no usefull stuff turned up yet. Probably dont need it if H17 and H18 are as useful as they sound.

 

[Ingwe]

I basically look at state of charge (SOC). We went away for three days last week and although hooked up, used the Victron IP22 on power supply function only as the leisure battery was fully charged. After 3 nights of having lots of lights on, the heating fan on almost constantly and about 5 hours of TV per day ( well the weather was lousy) the SOC was 80%. Well pleased with our new lithium batteries and associated Victron gear.

 

[68c]

You say you were 'hooked up', I assume you mean on the campsite 240v supply (EHU). So why has charge been taken from your Lithium battery? Genuine question as I thought when on EHU the power supply, being fed by the campsite supply, would mean no drain from the leisure battery.

 

[Ingwe]

You say you were 'hooked up', I assume you mean on the campsite 240v supply (EHU). So why has charge been taken from your Lithium battery? Genuine question as I thought when on EHU the power supply, being fed by the campsite supply, would mean no drain from the leisure battery.

Yes, hooked up to 240v mains. The TV, and lights all work off of the 12 volt system and therefore the leisure battery. As the mains charger was switched to power supply only, means that things like the Truma heating and hot water, microwave and the fridge, could be run off 240v without charging the the already full battery. I hope this is clear?

 

[68c]

Yes I think I understand. So to prevent the Lithium battery overcharging you have turned off the charge function and just using the power supply to run the 12v stuff. Is the 80% SOC your preferred 'full' level?

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[Ingwe]

Yes I think I understand. So to prevent the Lithium battery overcharging you have turned off the charge function and just using the power supply to run the 12v stuff. Is the 80% SOC your preferred 'full' level?

Put far more eloquently than I did! Yes. Actually, the power supply ran the 240v gear not the 12 volt stuff. This was run off the battery. And from what I understand, 80% is a good SOC for the lithiums. When I arrived at the site after a 3 hour drive from York, the B2B (also Victron) had charged the battery from 80% to 100%.

 

[68c]

Nice to see your battery recharged so quickly with B2B and a reasonable journey.

 

[the1andonly]

Any offers other than SOC