Hi Guys

I have a customer who monitors every incoming and outgoing Watt. Literately write down on paper. He has a Victron 8kva inverter and 3 x  BSL 7kwh batteries. Victron VRM will indicated that for example 10.5kwh has been used and then he will compare that to the percentage of the SOC. In other words 50%. But the percentage is a bit lower, say 45% due to losses. Which i explained to him. His question is what is a acceptable loss.

Thank you in advance.

 

5% loss when charging a lithium-based battery is pretty standard in my experience; maybe even a bit higher depending on charging current.

The customer also needs to understand that there are also further losses that can occur such as:

• Conversion losses when stepping down from the PV voltage to the battery voltage
• Conversion losses when rectifying AC to DC (and vice-versa)
• The inverter and battery both consume their own power, so additional losses are incurred there.

 

12 minutes ago, Voltageza said:

Hi Guys

I have a customer who monitors every incoming and outgoing Watt. Literately write down on paper. He has a Victron 8kva inverter and 3 x  BSL 7kwh batteries. Victron VRM will indicated that for example 10.5kwh has been used and then he will compare that to the percentage of the SOC. In other words 50%. But the percentage is a bit lower, say 45% due to losses. Which i explained to him. His question is what is a acceptable loss.

Thank you in advance.

 

 

Edited August 5, 20242 yr by JayMardern