Indeed, the vecan-dbus driver doesn’t provide you with more than 2 days of history because the device doesn’t broadcast itself, without being asked, more than that.
But, if you know how to talk directly with the MPPT, at CAN frame level, you can get each and every one of those 30 days.
You can try to read Victron registers 0x1050 to 0x106E. Or 0x10A0 to 0x10BE.
At least this holds true in my case (Multi RS Solar, with 2 MPPTs - CAN connected).
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