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[Solved] Combine Li-Ion Battery (TESS Type 549) with Inverter (Type 48)

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Topic starter

Hello, 

I am trying to simulate a simple PV system, with an integrated Lithium-Ion battery. I want to use for this the inverter Type 48c with the component Type 549a_v2a from the TESS library. 

However, I do not get expected results; the Power to/from battery only has a positive value, meaning that it only gets charged and the battery never gets used! 

Has anyone already tried this? Type 48c asks for different inputs that is impossible to link with the Lithium Battery Block, so I just inserted the values. 

Thank you for your help! 

1 Answer
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@jan-geier

It may be that not all of the modes of Type48 are compatible with Type549. However, Type48b is used with Type549a in the example that you might find in: ..\Trnsys18\Tess Models\Examples\Electrical Library\ResidentialPVwithLi-IonBattery_v2a.tpf

kind regards,

 David

 

jan.geier Topic starter 24/01/2024 8:42 am

@davidbradley

Thanks for the answer, I didn't know that there was such an example!
I did find out my mistake though, the battery bank specific heat I inserted was correct in J/kg*K and not in kJ/kg*K (the chosen unit in TRNSYS), so mostly user error.
I used Type 48c as an inverter but will end up choosing Type 48b, I think it is safer.
Thanks again for the help!

Best regards,

Jan

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