Sterling Power Products DAI-1500C-24xx - Manual (Page 26)

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M. Maintenance
Periodic maintenance is important to avoid potential problems. Every six months
disconnect all power in and out from the system. Thoroughly clean and check all
battery connections within the battery bank and to the unit . Ensure all
connections to the unit are tight. Ensure the vents at the top and bottom of the
unit are clear of any debris, such as mud wasps, severe dust build ups etc.
Other than this, you should enjoy years of trouble free operation form your
unit.