Epsolar LandStar LS0524R, Instruction Manual, Page: 15 / 40

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Before battery is connected, make sure that battery voltage is greater
than 6V so as to start up the controller. If system is 24V, make sure
battery voltage is not less than 18V. System voltage can only be
automatically recognized when controller start up for the first time.
The load should be DC applicant with the same rated voltage as
battery’s. Controller offers power to loads through the battery voltage.
It is recommended that no less than 2 times rated current fuse is
connected with battery and load.