gwatuk
Standard Member
I'm charging my MG 4 SE SR with a granny charger.
I have a Shelly EM power meter monitoring the cable that feeds the 13A socket that the charger is plugged in to.
( https://www.shelly.com/en-gb/products/product-overview/shelly-em-120a/shelly-em-50a )
(The cable is 4mm²)
I've been running a spreadsheet recording the charging data. Here's a typical entry:
Charging from 23% to 100% - this indicates that the battery's charge has increased by approximately 39.1kWh.
But the Shelly says that 44.9kWh has been used.
(A similar difference is repeated for all my charging sessions.)
Also, when charging, the car says that it is drawing about 1.7 to1.8 kW.
The Shelly says it's drawing 2.16kW.
(I've measured this with another power meter which says 2.15kW).
So where is all the extra power going? Is the car using it to heat the battery?
(The intelligent heating setting is off.)
I have a Shelly EM power meter monitoring the cable that feeds the 13A socket that the charger is plugged in to.
( https://www.shelly.com/en-gb/products/product-overview/shelly-em-120a/shelly-em-50a )
(The cable is 4mm²)
I've been running a spreadsheet recording the charging data. Here's a typical entry:
Charging from 23% to 100% - this indicates that the battery's charge has increased by approximately 39.1kWh.
But the Shelly says that 44.9kWh has been used.
(A similar difference is repeated for all my charging sessions.)
Also, when charging, the car says that it is drawing about 1.7 to1.8 kW.
The Shelly says it's drawing 2.16kW.
(I've measured this with another power meter which says 2.15kW).
So where is all the extra power going? Is the car using it to heat the battery?
(The intelligent heating setting is off.)