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Corect way to fit an Inverter

Please advise the correct way to install an Inverter. The boats batteries are charged via the engine alternater and 2 solar panels, 100w each. I installed a1000w inverter but have no 240v output. The inverter is new.Both poss. and neg. leads of the inverter are secure to bat. poles. Thank you John Dymond.

Asked by: John Dymond  | 1.35pm, Tuesday 4 March


WW says:

It sounds as though you have connected the inverter directly to the batteries. To meet the BSS requirements a fuse must be fitted close to the battery in the positive lead. A suitable fuse would be 200Amps.
Mains electricity on board a boat should have protection against electric shock with an RCD and the wiring should be protected by MCBs or fuses. The easiest way to do this is to fit a small consumer unit such as is sold for garages, with enough space for an RCD and two MCBs.
If you are going to add provision to connect to shore power via a 16A connector, it is important to ensure that it is impossible to connect the output of the inverter and the mains from the shore connection together, as this could be dangerous. A switch can be used or a simple system comprising a 13A plug attached to the boat wiring that can be plugged into the inverter OR a single socket connected to the shore power.

Rupert Smedley  | 3.42PM, Tuesday 4 March


Readers say:

Sir thank you for your reply, I have fitted a fuse, so that is not my problem. I will not have a 240v shore conn.The inverter output is to a socket in the galley to power small appliances and a TV set. Is it important that the inverter is only conn. to the bat. poles furthest from the engine alternator and solar. Why am I not getting any thing out with charged bats. ,engine running or not , solar charging or not please.I have a 100w inv. that plugs into a cigar. lighter which works Regards John Dymond.

John Dymond  | 12.41PM, Thursday 6 March

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