Voltageza Posted August 5 Share Posted August 5 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. Quote Link to comment Share on other sites More sharing options...
JayMardern Posted August 5 Share Posted August 5 (edited) 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 by JayMardern Quote Link to comment Share on other sites More sharing options...
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