Electrical Retrofit Decision Support

Marine Retrofit Electrical Load, Generator & Switchboard Capacity Tool

Screen whether a new electrical retrofit fits the vessel's running-load envelope, generator lineup, N-1 resilience, switchboard current capacity, motor-starting demand and future growth margin before detailed OEM, class and protection-coordination studies.

Currency
Currency selector changes display only. No exchange-rate conversion is performed.

Existing Electrical Plant

Enter the vessel's present operating point and available generation.

kW
kW
% rated
Use a site-specific derate if ambient, fuel, condition or OEM limits reduce output.
%
% online kW
Screening assumption only. Use OEM transient-response data for final design.

Proposed Retrofit Load

Model continuous and intermittent demand plus the largest motor or converter step.

kW
kW
%
kW
%
%

Main Switchboard

Screen total current against busbar and breaker limits. Enter the rating applicable to the section carrying the retrofit.

V
A
A
%

Vessel Electrical Baseline

Use advanced mode to allocate retrofit loads by bus section and model unequal generator ratings.

kW
V
%
%
%
% online kW
%

Retrofit Load Schedule

Add motors, HVAC modules, pumps, battery chargers, shore-power auxiliaries, hotel loads or other retrofit consumers. Running demand is quantity × kW × duty × diversity.

Load Qty kW each Duty % Diversity % PF Start x Bus Priority

Generator Lineup

Available kW uses each unit's rated output × derate. Check Online for the normal operating lineup.

Generator Rated kW Derate % Online Available kW

Switchboard Sections

A
A
A
A
Screening model: This tool estimates steady-state load, current, generator loading, simplified N-1 resilience and a screening motor-start event. Final retrofit approval should use vessel load analysis, OEM alternator and engine transient data, short-circuit calculations, protection coordination, harmonic studies where applicable, cable voltage-drop checks, class requirements and actual switchboard documentation.
Model boundary: Results are decision-support estimates, not class-approved or OEM-certified engineering calculations. Apparent power and current use a balanced three-phase approximation. Motor starting is represented as an equivalent screening step and does not predict voltage dip, recovery time, excitation response, engine governor response or protection operation.
Generated by ShipUniverse.com
By the ShipUniverse Editorial Team — About Us | Contact