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Posted (edited)

Hi folks

Need advice from the guru's please - I have researched but cannot find anything similar.

Mates system recently installed:

- Kodak 7.2 Inverter and a Pylontech UP5000 battery 

System is used as a load shedding solution, no panels as yet

 

However the problem is that the battery continually charges for +/- 10 seconds on then 10 seconds off, throughout the day, at +/-52Watts.

 

The result is that even on days without load shedding, ie 0 Kw discharge, there is still continuous power going into the battery (see screenshot from SolarAssist)

Battery is set to User as Pyl doesn't work - the chipset needs a software update as per Segen press release.

52V Float

52.5V Bulk 

 

Any advice would be greatly appreciated. 

Screenshot_20220523-141852_Chrome.jpg

Edited by Mattg
Posted
21 hours ago, Mattg said:

However the problem is that the battery continually charges for +/- 10 seconds on then 10 seconds off, throughout the day, at +/-52Watts.

That sounds normal to me. What is the actual problem?

Are you using SUB output source priority? Perhaps USB priority would use actual bypass mode, so that the idle power draw would be less, so you might not see so much power flow to/from the battery.

Posted

Thanks for the reply.

However I'm struggling to see how it is normal.

Currently set to Utility first - therefore batteries should only operate when utility fails.

The problem I cannot figure out is there is no Outflow from the batteries, but there is continuous Inflow to the batteries - ie batteries are always taking charge. 

Posted (edited)
4 hours ago, Mattg said:

Bump on this, anybody have an idea?

Mods please move to right section if I've posted incorrectly

Thanks

First thing to check, is your inverter use battery to power ON? can it work without a battery? if not, then maybe that is why it is charging and discharging the battery for 10sec

Edited by hoohloc
Posted

There seems to be some confusion around my initial post.

The battery is not discharging unless there is load shedding - on days where there is no load shedding, there is no discharge.

 

However, there is still continuous charge going to the battery, every +/- 10 seconds. 

Posted (edited)
17 hours ago, Mattg said:

there is still continuous charge going to the battery, every +/- 10 seconds.

Batteries do have a small self-discharge power; that's normal. All the electronics in a modern battery has to get power from somewhere. So it's normal for a battery to consume a little power just to maintain its float voltage.

Axpert inverters report battery current in whole amps, which means that there can be considerable errors at low currents. So they'll typically report either 0 or 1 amp for a low charge current, which will be reported as 0 or ≈52 W when the battery voltage is about 52 V. Power in watts = current in amps times the voltage in volts.

So this is normal, and nothing to be concerned about.

Edited by Coulomb
Posted
1 hour ago, Coulomb said:

Batteries do have a small self-discharge power; that's normal. All the electronics in a modern battery has to get power from somewhere. So it's normal for a battery to consume a little power just to maintain its float voltage.

Axpert inverters report battery current in whole amps, which means that there can be considerable errors at low currents. So they'll typically report either 0 or 1 amp for a low charge current, which will be reported as 0 or ≈52 W when the battery voltage is about 52 V. Power in watts = current in amps times the voltage in volts.

So this is normal, and nothing to be concerned about.

Thanks Coulomb, I'll not worry about it then.

I just found it strange that his system is drawing close to 1Kw per day for the battery, and mine which is very similar (except panels and additional batteries) does not. 

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