48Volt 100Ah BLSBatt Max Discharge setting

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Lourens asked Aug 25, '21

48Volt 100Ah BLSBatt Max Discharge setting

I have a question regarding changing parameters on a BSLBatt. I installed the 100Ah battery and upon commissioning it via a Cerbo I saw that the Max DC Discharge Current setting for the Battery as displayed via the Cerbo, is 105A. Both the Victron/BSLBatt setup manual and the battery specs indicate that that setting should be around 150-160 Amps DC (30A AC equivalent). My problem is I have one 2kw electric motor that trips the battery due to overload. (The machine has a slow start due to how it works - it is a big bandsaw).

My questions are
1- Am I correct in saying that parameter is set wrong in the battery?
2 - Is there a way I can change that setting myself via software or must it go back to the local agents for correction ?
3 - Can a support person do it online via Cerbo or Teams?

cerbo gx Lithium Battery current limit

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Answer 1 · 2021-08-27T07:22:27Z

Lourens answered · Aug 27, 2021 at 07:22 AM

I managed to answer my own questions after some research:
1 Parameter is set wrong in the battery? -- In order to protect the BMS in the battery, the suppliers set this as a low value - basically equal to continuous load values. It can be lifted higher if needs be.
2 - Is there a way I can change that setting myself via software or must it go back to the local agents for correction ? - One can probably do it yourself if a special Victron Cable (Ethernet to USB) is available and one have the correct software that can "read" the battery - which I currently have no clue what that could be.
3 - Can a support person do it online via Cerbo or Teams? Yes - they can if you have the special cable attachment available.

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Answer 2 · 2022-03-16T10:08:02Z

Kofi answered · Mar 16, 2022 at 10:08 AM

Hi Lourens,

How did you go about it finally?

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nickdb ♦♦ commented · Mar 16, 2022 at 10:45 AM

Do not manually change any BMS parameters, it is not smart and will void the warranty.

Later generations have a higher continuous discharge rate than earlier ones, the BMS is setting the system correctly and will automatically adapt the parameters as required via DVCC.

Like all batteries, they will permit a short burst (Max) discharge rate for a few seconds that is higher than the continuous rating.

If you need more power, buy more batteries.

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