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Energy Logger 4000 utility

This project provides a utility which can be used to read info and binary logs from the Voltcraft Energy Logger 4000 as sold by Conrad. A setup file (setupel3.bin) can also be read and written, this allows you to configure the device via the SD card.


To use this program, you will need the following:

  • A Python interpreter (version 2 or 3). Almost all Linux distributions have this already installed. For Mac OS X and Windows users, see Pythons download page.
  • (Recommended) A SecureDigital card to communicate with the EL4000. The EL4000 manual recommends a 4 GB card which which works fine for me.
  • (Recommended) A Voltcraft Energy Logger 4000. It should also work with a EL3500 since it has the same file format, but I could not test this.

This program has been tested with a Voltcraft Energy Logger 4000F (with a French power plug and a German adapter, bought via eBay) on a Dutch energy network.


Since this program is a console application, you need to open a terminal (or cmd) first. Available options:

$ python --help
usage: [-h] [-p {raw,base,watt,va,csv}] [-d DELIMITER] [-v]
                 [-s [key=value [key=value ...]]] [-o]
                 binfile [binfile ...]

Energy Logger 4000 utility

positional arguments:
  binfile               info or data files (.bin) from SD card. If --setup is
                        given, then this is the output file (and input for
                        defaults). The order of files are significant when a
                        timestamp is involved

optional arguments:
  -h, --help            show this help message and exit
  -p {raw,base,watt,va,csv}, --printer {raw,base,watt,va,csv}
                        Output formatter (default 'base')
  -d DELIMITER, --delimiter DELIMITER
                        Output delimiter for CSV output (default ',')
  -v, --verbose         Increase logging level (twice for extra verbose)
  -s [key=value [key=value ...]], --setup [key=value [key=value ...]]
                        Process a setupel3.bin file. Optional parameters can
                        be given to set a field (-s unit_id=1 for example). If
                        no parameters are given, the current values are

Example: print time and watt as CSV

Given a data file A0810702.BIN, you can write a results.csv file with:

$ python -p csv A0810702.BIN > results.csv

Its content may look like:

2014-06-27 13:13,237.1,0.215,0.420
2014-06-27 13:14,236.5,0.206,0.420
2014-06-27 13:15,235.7,0.199,0.420
2014-06-27 13:16,237.3,0.204,0.420

If you happen to see "1970-01-01" as timestamp, be sure to include the info files (102 bytes) before others (and use --data-only to hide the contents of this info file). Compare:

$ python -p csv A07EF88B.BIN
1970-01-01 00:00,238.5,0.000,0.000
1970-01-01 00:01,239.5,0.000,0.000
$ python -p csv --data-only A07EF88A.BIN A07EF88B.BIN
2014-06-25 16:53,238.5,0.000,0.000
2014-06-25 16:54,239.5,0.000,0.000

Example: show information file

The information file is 102 bytes, its contents can be examined just like a data file:

$ python A0810701.BIN
header_magic                        b'INFO:'
total_power_consumption             0.534 kWh
total_recorded_time                 2119h 04m
total_on_time                       2115h 15m
total_kwh_today_min_0               0.1 kWh
total_kwh_today_min_9               0.0 kWh
total_recorded_time_today_min_0     3h 42m
total_recorded_time_today_min_9     0h 00m
total_on_time_today_min_0           3h 42m
total_on_time_today_min_9           0h 00m
unit_id                             0
tariff1                             0.221
tariff2                             0.227
init_time_hour                      16
init_time_minute                    53
init_date_month                     6
init_date_day                       25
init_date_year                      14
end_of_file_code                    b'\xff\xff\xff\xff'

Example: configure setup file

The available setup options and values can be displayed with the the --setup option (or its abbreviation, -s). Example:

$ python setupel3.bin --setup
header_magic    b'\x00\x00\x00'
unit_id         0
hour_format     0
date_format     0
time_hour       0
time_minute     0
date_month      0
date_day        0
date_year       0
currency        0
tariff1         0.0
tariff2         0.0

To actually set values, specify one or more options to --setup. Definitions can be found in the file Overview of options:

  • unit_id: ranges from 0 to 9.
  • hour_format: 1 for 12h format, 2 for 24h format.
  • date_format: 1 for mm/dd/yy, 2 for dd/mm/yy display.
  • time_* and date_*: set the initial clock. Note that date_year is in abbreviated form. Instead of 2014, use 14.
  • currency: 1 for £, 2 for Sfr, 4 for $ and 8 for
  • tariff, tariff2: ranges from 0.000 to 9.999.

To modify (or create) the setupel3.bin file for a 24h clock, dd/mm/yy date format and euros, use:

$ ./ setupel3.bin -s hour_format=2 date_format=2 currency=8
Changing hour_format from 0 to 2
Changing date_format from 0 to 2
Changing currency from 0 to 8
WARNING:Format:Invalid value 0 for name date_month
WARNING:Format:Invalid value 0 for name date_day
Setup file:  setupel3.bin
header_magic    b'\xb8\xad\xf2'
unit_id         0
hour_format     2
date_format     2
time_hour       0
time_minute     0
date_month      0
date_day        0
date_year       0
currency        8
tariff1         0.0
tariff2         0.0


If you have issues, questions, ideas or suggestions, feel free to contact me at or open a ticket at Pull requests are also welcome.


Copyright (C) 2014 Peter Wu

Energy Logger 4000 utility is licensed under the MIT license. See the LICENSE file for more details.



Energy Logger 4000 utility







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