Hello community, Just played around with the VRM and downloaded the production reports for the last 6 months. Looking at the Battery section - Charge kWh vs. Discharge kWh and I was surprised that the ration between charge and discharge is around 70%. The info is consistent and around this value …

Don’t think so, as the power is measured at the exit to the loads and the inverter consumption is before that.

4x us3000c 14.4kWh ~80%efficiency [Screenshot from 2024-09-11 00-26-45]

As several users report 10% or more with better efficiency than my 68% I thought about the reasons for the diffrences of very same hardware (US5000, MP2-5000, RS450). One thing to examine seperate: The VRM Download only works on one of three PCs. They all use Firefox 130.0. One W10 system is ok, a…

Sorry guys, but this isn’t the way to effectively see the round-trip-efficiency of your batteries. Just for fun I grabbed those figures for my fairly fresh 2x US500B’s, and they bobbed at 61%. Ridiculous. System losses the first reason. And you can plainly see inverter standby losses if you set up …

Ok, here is my scenario: Totally Off Grid AC loads only 1 x Odipie 100A Battery . . . in parallel with 1 x 304A Self-built Battery (with excellent tested cells max 2mA discrepancy in operation on Seplos 200 10E) 2 x 250/100 Victron MPPTs (1 per group of strings) 2 x Multiplus II 5000 in par…

You probably should use empiric values to determine the efficency not rely on momentary measurements. At the end, it doesn’t matter if you “compute” some theoretical 80-90% Efficiency but the actual values just workout to something like 70%. Take the Value (Grid-Usage Graph yearly) “To Battery” pe…

[image] JohnC: But the real killer is actual DC loads which, This is correct. I have a constant DC load of 25 Watt. Occasionally up to 60 Watt. They are meassured by a 500Amp smartshunt very accurate. For unknown reaons this DC load is not displayed by the dashbaord as soon as there is a gri…

[image] Janvi: This is correct. I have a constant DC load of 25 Watt. Occasionally up to 60 Watt. They are meassured by a 500Amp smartshunt very accurate. For unknown reaons this DC load is not displayed by the dashbaord as soon as there is a grid counter. This is apparently, because the Opti…

Settings->SystemSetup->HasDCLoads ist enabled. Smartshunt is displayed in the device list with correct values. This is not true for the graphical dashboard only. [Screenshot from 2024-09-12 12-56-41]

Do you have the Option to configure that shunt as “meter of type DC System” as outlined here? [image] The DC System Power on a Venus device is jumping, erratic or does not match other loads … to install a SmartShunt or BMV 712 measuring all DC loads that are not measured. This shunt is then set …

Battery/System efficiency only 70%?

Q&A and troubleshooting DESS

dognose September 12, 2024, 11:39am 46

Do you have the Option to configure that shunt as “meter of type DC System” as outlined here?

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Battery/System efficiency only 70%?

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