This page last updated on September 8, 2023
My brother in-law has a Beneteau Oceanis 45 sailboat and it constantly surprises me that obtaining any technical information on it seem impossible. You would think there would be concise and easily available manuals for it’s myriad of complex systems but that isn’t the case. Over the last few years I have been collecting such information and thought it may be handy for others. Please note this information is based on my experiences and may not be relevant for your boat.
MANUALS
There seems to be many versions of the owners manual but this one is the most complete that I have seen: Oceanis 45 General Manual
This boat uses SIMRAD equipment connected using the SIMNET system. This manual shows basic information on the SIMNET system and various connected devices: Oceanis 45 Electronics Manual
This is the most complete electrical drawing for the boat and so far has matched up to what was factory installed: Oceanis 45 Electrical Drawing
This is a spreadsheet showing some of the parts used in the Oceanis 45. It includes vender information and part number for a wide range of parts used: Oceanis 45 Parts List
SITES
One of the most relevant sites I have found for the OC 45 is the Facebook group Beneteau Oceanis 41, 45 & 48 Global Community
https://www.facebook.com/groups/1764398523641652
NOTES & ISSUES
Shore Power vs Invertor Power
The boat has both a Shore Power AC connection and a 2000W AC Invertor. There is no way to switch the AC outlets between the two sources. The AC panel has a relay that automatically switches between the sources based on the Shore Power status. If there is no Shore power connected the AC outlets are connected to the Invertor. If there is Shore Power connected then a relay switches the outlets over to the Shore Power connection.
This can cause a problem if you happen to be on Shore Power but leave your Invertor powered up and happen to be away from your boat. If the Shore Power fails the load gets dumped onto the Invertor. This can drain your house batteries down pretty quickly. As far as I can tell there is no way to turn off this feature. So it is always good to make sure you have your Invertor turned off when connected to Shore Power (or in general except for when you are actually using it).