MAN Alternator N1-28V 10/55A 51261017205

About this part

Genuine MAN alternator rated 28 V at 10/55 A for the D2840 LE301 and D2848 LE422. The dual current figure describes output at two speeds — the lower at idle, the higher at working speed — which matters on a vessel that spends time manoeuvring or lying alongside with the engine at low revs and a domestic load running. An alternator sized by its maximum output alone can be inadequate in exactly those conditions. Where battery charging has become unreliable on a boat whose usage pattern has changed, the low-speed figure rather than the rated output is usually the one that explains it. Logging charging voltage at idle with the domestic load running is the test that reproduces the condition where the shortfall appears.

Supplied new, in the manufacturer’s packaging, with our warranty of up to 24 months.

Engines this part fits