Marine UPS System · Battery & UPS Systems
The Sentryum Rack Marine UPS SMM 20 and SMT 20 from RPS S.p.A. are marine uninterruptible power supplies of the rack type, covered by DNV certificate TAE00004T7. They supply protected power to critical electrical loads when the main supply fails or is disturbed. They are installed in switchboard rooms, electrical rooms or control stations on board.
| Battery condition check (voltage, visual) | monthly |
|---|---|
| Full battery load/runtime test | annually, or per maker interval |
| Battery replacement | typically every 3-5 years for VRLA batteries, per maker recommendation and test results |
| Ventilation fan/filter check | quarterly |
| Function test (simulated mains failure) | per SOLAS/class requirement for the equipment served, commonly monthly to quarterly |
| Battery backup runtime | renew the battery set once measured runtime falls to roughly 80% of rated duration or below - confirm against the maker's test procedure |
|---|---|
| Battery internal resistance/impedance | renew once it rises significantly above the as-new baseline recorded at commissioning - trend against that baseline rather than a fixed figure |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Filed under 'Emergency Power / Emergency Generator Set', but the actual product is an uninterruptible power supply, not a generator set. Where this UPS serves navigation, communication or safety systems required by SOLAS, class verifies battery test records and confirms backup duration meets the requirement for the equipment served - it does not substitute for a required emergency generator.
Estimated lifetime: UPS electronics (charger/inverter) are typically designed for 10+ years of service; the battery is the limiting component and is typically renewed every 3-5 years depending on chemistry, temperature and duty cycle - confirm against the maker's data sheet.
Verified against the DNV Approval Finder — the certificate below is issued by DNV, not by us.
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