Application pages
Lithium Boat Battery Systems by Boat Type
The right bank for a tinnie and the right bank for a liveaboard are different problems, not the same problem at different scales. Each page carries the load profile we see on that hull, the budget and premium builds, what owners of that boat get wrong, and a one-click calculator preset.
Small boat, full system
Battery restraint, isolation and protection on small boats
The bank may be one case under a console, but the design questions do not disappear: where fault current is interrupted, how the terminals stay covered, how the battery is held through impact, and whether the alternator and charger suit the chemistry.
50–100 Ah house bank12 ft tinnieDay boat · one or two aboard · 12 V14 Ah per day, typical100 Ah house bankBowriderDay boat · four to six aboard · 12 V50 Ah per day, typical100–200 Ah house bankHalf cabinOvernighter · two to four aboard · 12 V75 Ah per day, typical200–300 Ah house bankOffshore centre consoleLong days offshore · twin outboards · 12 V or 24 V110 Ah per day, typical100–200 Ah house bankTrailer sailerWeekend cruiser · two aboard · 12 V · small outboard55 Ah per day, typical400–600 Ah house bank38 ft cruising yachtCoastal cruiser · two aboard · 12 V · one engine149 Ah per day, typical600–1000 Ah house bankCruising catamaranTwo hulls, two engines · four aboard · 24 V preferred260 Ah per day, typical600 Ah + house bankHouseboatDomestic loads afloat · six or more aboard · 12 V or 24 V320 Ah per day, typical600–800 Ah house bankLiveaboardPermanent home afloat · two aboard · 12 V or 24 V220 Ah per day, typical