Incorrect SoC for Lead Acid: Custom PV-battery

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Benjamin
Topic Author

27 Apr 2020 13:22 #8146 by Benjamin

Incorrect SoC for Lead Acid: Custom PV-battery was created by Benjamin

Hello everyone!

Im trying to simulate a saltwater battery as a Lead Acid: Custom PV-battery but have run into some problems.

When discharging or charging a large amout of kWh only a tiny fraction of the SoC is discharged/charged as you can see in this table: i.imgur.com/y1tT4LB.png

I was wondering what the problem would be? Why is the battery acting like this?

Im using this weather data and have attached the project file.
climate.onebuilding.org/WMO_Region_6_Europe/SWE_Sweden/UP_Uppsala/SWE_UP_Uppsala.University.024620_TMYx.2004-2018.zip

File Attachment:

File Name: SaltwaterS...4-27.sam
File Size:175 KB

I would be very grateful for even the smallest bit of help!

Thank you in advance.

SaltwaterS...4-27.sam

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Paul Gilman

27 Apr 2020 21:24 #8150 by Paul Gilman

Replied by Paul Gilman on topic Incorrect SoC for Lead Acid: Custom PV-battery

Hi Benjamin,
.
You specified a custom voltage curve with a maximum cell voltage of 40 V but left the cell nominal voltage at its default 1.5 VDC. Changing the cell nominal voltage to 48 V will result in a more reasonably sized battery bank so that the battery charges and discharges at the rates you expect.