We'll be working on this beauty 45 foot sailboat and be convert it to an electric drive. Our first thought was where is this motor coming from and how big does our lithium ion (or lithium iron phosphate) battery bank need to be. 2 things to consider when talking batteries. AGM would come in at a much more desirable price point, but the energy density is almost half. Secondly the discharge of an AGM battery is recommended to be 40-50% depending on brand (carbon foam fireflys excluded). Lithium ion can be closer to full discharge making the usable energy capacity much much greater and taking up a significantly smaller footprint on the boat. Besides battery type and consideration of the voltage requirements of the on-board electric retrofit motor, which could be anywhere from 12-48 volt, we will either be coupling the house bank with the lithium motor bank with an ACR (automatic charging relay) or simply switching the house bank out and having one bank for both systems. Because we'll be eliminating the "generating feature" of the alternator on the dual diesel on-board motors, shore power will be the fastest and most efficient way to charge the motor/house bank, but it will also eliminate the the ability to turn on the engine for a quick battery top up when at anchor especially when using more demanding loads - keeping beer cold, music going, small appliances and unconverted incandescent lighting going are huge energy sucks when out at sea. That all considered, a backup generator for emergency battery top up will be considered. Supplemental solar will be added, and we'll be looking at a small microhydro turbine to give supplemental charge when the sails are up. Our boat jobs have been limited to only close friends and family, but we'll never turn down the opportunity to get on a boat & put our skills to use. Can you tell we're looking forward to this project? Hopefully there will be cold beer in the fridge when our first week is complete and Friday hits 😉 https://www.instagram.com/p/B860BfzB-cx/?igshid=1gznzyo2m6s2v