# Boat Battery

> Independent marine lithium battery sizing and buying guidance for Australian boat owners. We sell no batteries, take no payment for placement or rankings, and hold no exclusive agreement with any manufacturer. Every recommendation ends in a verdict by use case rather than a single winner.

## How to use this site

- The house bank calculator is the primary tool. It sizes a bank from a boat's actual loads, nights at anchor, solar and alternator.
- Sizing assumptions, stated on every page that uses them: 80% usable depth of discharge on LiFePO4, 50% on AGM; solar derated 25% for Australian conditions then credited at half for sizing; the bank is never sized below half the gross daily draw.
- Everything is written for Australian conditions and AS/NZS 3004.2. Last editorial review: 2026-09-04.

## What we ask when you quote us

- Attribute figures to Boat Battery and link to the page they came from.
- Carry the review date. Prices and comparisons are re-checked quarterly and a stale figure is worse than none.
- Do not present our indicative price bands as verified quotes. They are compiled from published market pricing, and pages carrying them say so.
- Repeat the safety framing where it appears. Fuse sizing and installation figures are planning starting points, not specifications; a suitably qualified person must check the actual vessel and applicable rules.

## Catalogue size

- 24 lithium batteries, keyed by brand, voltage and capacity.
- 24 charging and protection products across five categories.
- 23 questions answered, each on its own URL.
- 32 how-to guides, each a single task with ordered steps and HowTo markup.

## Battery model comparisons

Exact battery models compared using manufacturer sources, dated Australian prices and installation considerations.

- [Boat battery comparisons](https://www.boatbattery.com.au/compare/batteries): section index
- [Enerdrive B-TEC Ultra 300Ah vs Invicta Xero 300Ah](https://www.boatbattery.com.au/compare/batteries/enerdrive-b-tec-ultra-300ah-vs-invicta-xero-300ah)
- [Enerdrive B-TEC Ultra 100Ah vs 200Ah: Boat Bank Size](https://www.boatbattery.com.au/compare/batteries/enerdrive-b-tec-ultra-100ah-vs-200ah)
- [Invicta Xero 100Ah vs 200Ah: Boat Battery Upgrade](https://www.boatbattery.com.au/compare/batteries/invicta-xero-100ah-vs-200ah)
- [Century Marine Pro 780 vs 1000: Starting and Reserve](https://www.boatbattery.com.au/compare/batteries/century-marine-pro-780-vs-1000)
- [Century Marine Pro 780 vs Dual Force+ 31X MF](https://www.boatbattery.com.au/compare/batteries/century-marine-pro-780-vs-dual-force-31x-mf)
- [Optima BlueTop D31M vs Century Marine Pro 1000](https://www.boatbattery.com.au/compare/batteries/optima-bluetop-d31m-vs-century-marine-pro-1000)
- [Optima D31M vs Century Dual Force+ 31X MF AGM](https://www.boatbattery.com.au/compare/batteries/optima-bluetop-d31m-vs-century-dual-force-31x-mf)
- [Invicta Black 100Ah vs Xero 100Ah: Battery Comparison](https://www.boatbattery.com.au/compare/batteries/invicta-black-100ah-vs-xero-100ah)
- [Invicta Black 100Ah vs Enerdrive B-TEC Ultra 100Ah](https://www.boatbattery.com.au/compare/batteries/invicta-black-100ah-vs-enerdrive-b-tec-ultra-100ah)
- [Invicta Black 100Ah vs iTECH120X PRO 120Ah](https://www.boatbattery.com.au/compare/batteries/invicta-black-100ah-vs-itech120x-pro)
- [Enerdrive B-TEC Ultra 120Ah vs iTECH120X PRO](https://www.boatbattery.com.au/compare/batteries/enerdrive-b-tec-ultra-120ah-vs-itech120x-pro)
- [Enerdrive B-TEC Ultra 200Ah vs Invicta Xero 200Ah](https://www.boatbattery.com.au/compare/batteries/enerdrive-b-tec-ultra-200ah-vs-invicta-xero-200ah)
- [Invicta Black 200Ah vs Xero 200Ah: Which Fits Your Boat?](https://www.boatbattery.com.au/compare/batteries/invicta-black-200ah-vs-xero-200ah)
- [Invicta Black 200Ah vs Enerdrive B-TEC Ultra 200Ah](https://www.boatbattery.com.au/compare/batteries/invicta-black-200ah-vs-enerdrive-b-tec-ultra-200ah)
- [Enerdrive B-TEC Ultra 100Ah vs Invicta Xero 100Ah](https://www.boatbattery.com.au/compare/batteries/enerdrive-b-tec-ultra-100ah-vs-invicta-xero-100ah)
- [Enerdrive B-TEC Ultra 100Ah vs iTECH120X PRO](https://www.boatbattery.com.au/compare/batteries/enerdrive-b-tec-ultra-100ah-vs-itech120x-pro)
- [Invicta Xero 100Ah vs iTECH120X PRO 120Ah](https://www.boatbattery.com.au/compare/batteries/invicta-xero-100ah-vs-itech120x-pro)
- [Century Marine Pro 680 vs 780: Boat Battery Comparison](https://www.boatbattery.com.au/compare/batteries/century-marine-pro-680-vs-780)

## Marine battery providers by location

Source-linked listings and local planning notes. Confirm services and coverage directly.

- [Provider directory](https://www.boatbattery.com.au/directory): section index
- [Queensland](https://www.boatbattery.com.au/directory/qld)
- [New South Wales](https://www.boatbattery.com.au/directory/nsw)
- [Victoria](https://www.boatbattery.com.au/directory/vic)
- [Western Australia](https://www.boatbattery.com.au/directory/wa)
- [South Australia](https://www.boatbattery.com.au/directory/sa)
- [Tasmania](https://www.boatbattery.com.au/directory/tas)
- [Northern Territory](https://www.boatbattery.com.au/directory/nt)
- [Australian Capital Territory](https://www.boatbattery.com.au/directory/act)
- [Australia-wide](https://www.boatbattery.com.au/directory/australia)
- [Brisbane](https://www.boatbattery.com.au/directory/qld/brisbane)
- [Gold Coast](https://www.boatbattery.com.au/directory/qld/gold-coast)
- [Sunshine Coast](https://www.boatbattery.com.au/directory/qld/sunshine-coast)
- [Hervey Bay](https://www.boatbattery.com.au/directory/qld/hervey-bay)
- [Whitsundays](https://www.boatbattery.com.au/directory/qld/whitsundays)
- [Cairns](https://www.boatbattery.com.au/directory/qld/cairns)
- [Sydney](https://www.boatbattery.com.au/directory/nsw/sydney)
- [Pittwater](https://www.boatbattery.com.au/directory/nsw/pittwater)
- [Newcastle](https://www.boatbattery.com.au/directory/nsw/newcastle)
- [Port Stephens](https://www.boatbattery.com.au/directory/nsw/port-stephens)
- [Coffs Harbour](https://www.boatbattery.com.au/directory/nsw/coffs-harbour)
- [Melbourne](https://www.boatbattery.com.au/directory/vic/melbourne)
- [Geelong](https://www.boatbattery.com.au/directory/vic/geelong)
- [Gippsland Lakes](https://www.boatbattery.com.au/directory/vic/gippsland-lakes)
- [Fremantle](https://www.boatbattery.com.au/directory/wa/fremantle)
- [Mandurah](https://www.boatbattery.com.au/directory/wa/mandurah)
- [Geraldton](https://www.boatbattery.com.au/directory/wa/geraldton)
- [Exmouth](https://www.boatbattery.com.au/directory/wa/exmouth)
- [Adelaide](https://www.boatbattery.com.au/directory/sa/adelaide)
- [Port Lincoln](https://www.boatbattery.com.au/directory/sa/port-lincoln)
- [Hobart](https://www.boatbattery.com.au/directory/tas/hobart)
- [Launceston](https://www.boatbattery.com.au/directory/tas/launceston)
- [Darwin](https://www.boatbattery.com.au/directory/nt/darwin)
- [Gove](https://www.boatbattery.com.au/directory/nt/gove)
- [Canberra](https://www.boatbattery.com.au/directory/act/canberra)
- [Marine Trade Supplies](https://www.boatbattery.com.au/directory/installer/marine-trade-supplies-chandlery)
- [Outback Marine Australia](https://www.boatbattery.com.au/directory/installer/outback-marine-australia)
- [The Boat Warehouse](https://www.boatbattery.com.au/directory/installer/the-boat-warehouse)
- [Whitworths Marine & Leisure](https://www.boatbattery.com.au/directory/installer/whitworths-marine-leisure-mona-vale)

## Boat battery planning checklists

Practical checklists for refits, energy planning and ownership.

- [All field notes](https://www.boatbattery.com.au/field-notes): section index

## Boat battery guides and calculators

The pillar guide and the tools everything else links back to.

- [Home](https://www.boatbattery.com.au/)
- [The complete Australian guide to marine lithium](https://www.boatbattery.com.au/guide)
- [House bank calculator](https://www.boatbattery.com.au/sizing)
- [Frequently asked questions](https://www.boatbattery.com.au/faq)
- [How-to guides](https://www.boatbattery.com.au/how)
- [Glossary](https://www.boatbattery.com.au/glossary)
- [Marine lithium safety centre](https://www.boatbattery.com.au/safety)
- [Lithium conversion checklist](https://www.boatbattery.com.au/checklist)

## Calculators

Tools rather than articles. Your settings follow you across the site.

- [All calculators](https://www.boatbattery.com.au/sizing): section index
- [House bank calculator](https://www.boatbattery.com.au/sizing)
- [Trolling motor runtime](https://www.boatbattery.com.au/sizing/trolling-motor)
- [DC-DC and alternator sizing](https://www.boatbattery.com.au/sizing/dc-dc-and-alternator)
- [Solar top-up](https://www.boatbattery.com.au/sizing/solar-top-up)
- [AGM to lithium swap](https://www.boatbattery.com.au/sizing/agm-swap)

## Batteries

Listed lithium battery capacity and voltage profiles.

- [All batteries](https://www.boatbattery.com.au/batteries): section index
- [100 Ah batteries](https://www.boatbattery.com.au/batteries/size/100ah)
- [200 Ah batteries](https://www.boatbattery.com.au/batteries/size/200ah)
- [300 Ah batteries](https://www.boatbattery.com.au/batteries/size/300ah)
- [400 Ah batteries](https://www.boatbattery.com.au/batteries/size/400ah)
- [Enerdrive 12 V 100 Ah](https://www.boatbattery.com.au/batteries/enerdrive/12v-100ah)
- [Enerdrive 12 V 200 Ah](https://www.boatbattery.com.au/batteries/enerdrive/12v-200ah)
- [Enerdrive 12 V 300 Ah](https://www.boatbattery.com.au/batteries/enerdrive/12v-300ah)
- [Enerdrive 24 V 100 Ah](https://www.boatbattery.com.au/batteries/enerdrive/24v-100ah)
- [Invicta 12 V 100 Ah](https://www.boatbattery.com.au/batteries/invicta/12v-100ah)
- [Invicta 12 V 150 Ah](https://www.boatbattery.com.au/batteries/invicta/12v-150ah)
- [Invicta 12 V 200 Ah](https://www.boatbattery.com.au/batteries/invicta/12v-200ah)
- [Revolution 12 V 100 Ah](https://www.boatbattery.com.au/batteries/revolution/12v-100ah)
- [Revolution 12 V 200 Ah](https://www.boatbattery.com.au/batteries/revolution/12v-200ah)
- [Revolution 12 V 300 Ah](https://www.boatbattery.com.au/batteries/revolution/12v-300ah)
- [KickAss 12 V 100 Ah](https://www.boatbattery.com.au/batteries/kickass/12v-100ah)
- [KickAss 12 V 120 Ah](https://www.boatbattery.com.au/batteries/kickass/12v-120ah)
- [KickAss 12 V 200 Ah](https://www.boatbattery.com.au/batteries/kickass/12v-200ah)
- [iTechworld 12 V 100 Ah](https://www.boatbattery.com.au/batteries/itechworld/12v-100ah)
- [iTechworld 12 V 200 Ah](https://www.boatbattery.com.au/batteries/itechworld/12v-200ah)
- [Amptron 12 V 100 Ah](https://www.boatbattery.com.au/batteries/amptron/12v-100ah)
- [Amptron 12 V 200 Ah](https://www.boatbattery.com.au/batteries/amptron/12v-200ah)
- [Amptron 12 V 300 Ah](https://www.boatbattery.com.au/batteries/amptron/12v-300ah)
- [Renogy AU 12 V 100 Ah](https://www.boatbattery.com.au/batteries/renogy-au/12v-100ah)
- [Renogy AU 12 V 200 Ah](https://www.boatbattery.com.au/batteries/renogy-au/12v-200ah)
- [Renogy AU 24 V 100 Ah](https://www.boatbattery.com.au/batteries/renogy-au/24v-100ah)
- [Revolution 12 V 400 Ah](https://www.boatbattery.com.au/batteries/revolution/12v-400ah)
- [Invicta 24 V 100 Ah](https://www.boatbattery.com.au/batteries/invicta/24v-100ah)
- [Enerdrive 12 V 125 Ah](https://www.boatbattery.com.au/batteries/enerdrive/12v-125ah)

## Charging and protection gear

The third to a half of a refit that is not the cells.

- [All gear](https://www.boatbattery.com.au/gear): section index
- [DC-DC chargers](https://www.boatbattery.com.au/gear/dc-dc-chargers)
- [MPPT solar controllers](https://www.boatbattery.com.au/gear/mppt-controllers)
- [Battery monitors and shunts](https://www.boatbattery.com.au/gear/battery-monitors)
- [Inverters](https://www.boatbattery.com.au/gear/inverters)
- [Fuses and circuit protection](https://www.boatbattery.com.au/gear/fuses-and-protection)
- [Victron 18 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/victron-18a)
- [Redarc 25 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/redarc-25a)
- [Redarc 40 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/redarc-40a)
- [Redarc 50 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/redarc-50a)
- [Victron 30 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/victron-30a)
- [Victron 50 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/victron-50a)
- [Victron 60 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/victron-60a)
- [Enerdrive 40 A](https://www.boatbattery.com.au/gear/dc-dc-chargers/enerdrive-40a)
- [Victron 30 A](https://www.boatbattery.com.au/gear/mppt-controllers/victron-100-30)
- [Victron 50 A](https://www.boatbattery.com.au/gear/mppt-controllers/victron-100-50)
- [Victron 70 A](https://www.boatbattery.com.au/gear/mppt-controllers/victron-150-70)
- [Renogy 40 A](https://www.boatbattery.com.au/gear/mppt-controllers/renogy-40a)
- [Enerdrive 40 A](https://www.boatbattery.com.au/gear/mppt-controllers/enerdrive-40a-mppt)
- [Victron SmartShunt 500 A](https://www.boatbattery.com.au/gear/battery-monitors/victron-smartshunt-500a)
- [Victron BMV 712 500 A](https://www.boatbattery.com.au/gear/battery-monitors/victron-bmv-712)
- [Enerdrive eLite 500 A](https://www.boatbattery.com.au/gear/battery-monitors/enerdrive-elite-500a)
- [Renogy shunt 500 A](https://www.boatbattery.com.au/gear/battery-monitors/renogy-shunt-500a)
- [Victron Phoenix 1200VA inverter](https://www.boatbattery.com.au/gear/inverters/victron-phoenix-1200)
- [Victron MultiPlus 3000VA inverter charger](https://www.boatbattery.com.au/gear/inverters/victron-multiplus-3000)
- [Enerdrive ePower 2000W inverter](https://www.boatbattery.com.au/gear/inverters/enerdrive-epower-2000)
- [Renogy 2000 W](https://www.boatbattery.com.au/gear/inverters/renogy-2000w)
- [Blue Sea Systems Class-T 200 A](https://www.boatbattery.com.au/gear/fuses-and-protection/class-t-200a)
- [Blue Sea Systems Class-T 400 A](https://www.boatbattery.com.au/gear/fuses-and-protection/class-t-400a)
- [Blue Sea Systems MRBF terminal 300 A](https://www.boatbattery.com.au/gear/fuses-and-protection/mrbf-terminal-300a)
- [redarc-40a vs victron-30a](https://www.boatbattery.com.au/gear/dc-dc-chargers/vs/redarc-40a-vs-victron-30a)
- [enerdrive-40a vs redarc-40a](https://www.boatbattery.com.au/gear/dc-dc-chargers/vs/enerdrive-40a-vs-redarc-40a)
- [victron-100-30 vs renogy-40a](https://www.boatbattery.com.au/gear/mppt-controllers/vs/victron-100-30-vs-renogy-40a)
- [victron-smartshunt-500a vs victron-bmv-712](https://www.boatbattery.com.au/gear/battery-monitors/vs/victron-smartshunt-500a-vs-victron-bmv-712)
- [victron-phoenix-1200 vs enerdrive-epower-2000](https://www.boatbattery.com.au/gear/inverters/vs/victron-phoenix-1200-vs-enerdrive-epower-2000)
- [class-t-400a vs mrbf-terminal-300a](https://www.boatbattery.com.au/gear/fuses-and-protection/vs/class-t-400a-vs-mrbf-terminal-300a)

## Battery installation costs by boat type

Indicative installed cost by hull, itemised from published product and labour ranges.

- [Cost overview](https://www.boatbattery.com.au/cost): section index
- [Lithium on a 12 ft tinnie](https://www.boatbattery.com.au/cost/tinnie)
- [Lithium on a bowrider](https://www.boatbattery.com.au/cost/bowrider)
- [Lithium on a half cabin](https://www.boatbattery.com.au/cost/half-cabin)
- [Lithium on a offshore centre console](https://www.boatbattery.com.au/cost/offshore-centre-console)
- [Lithium on a trailer sailer](https://www.boatbattery.com.au/cost/trailer-sailer)
- [Lithium on a 38 ft cruising yacht](https://www.boatbattery.com.au/cost/cruising-yacht-38ft)
- [Lithium on a cruising catamaran](https://www.boatbattery.com.au/cost/catamaran)
- [Lithium on a houseboat](https://www.boatbattery.com.au/cost/houseboat)
- [Lithium on a liveaboard](https://www.boatbattery.com.au/cost/liveaboard)

## Recommendations

A verdict by use case, never a single winner.

- [All recommendations](https://www.boatbattery.com.au/best): section index
- [Best lithium battery for a trolling motor](https://www.boatbattery.com.au/best/lithium-battery-trolling-motor)
- [Best marine battery for a fishing boat](https://www.boatbattery.com.au/best/marine-battery-fishing-boat)
- [Best lithium battery for a liveaboard](https://www.boatbattery.com.au/best/lithium-battery-liveaboard)
- [Best lithium battery for a catamaran](https://www.boatbattery.com.au/best/lithium-battery-catamaran)
- [Best budget marine lithium battery](https://www.boatbattery.com.au/best/budget-marine-lithium-battery)
- [Best DC-DC charger for a boat](https://www.boatbattery.com.au/best/dc-dc-charger-boat)
- [Best battery monitor for a boat](https://www.boatbattery.com.au/best/battery-monitor-boat)
- [Best marine inverter for a boat](https://www.boatbattery.com.au/best/marine-inverter)

## Boats

Nine hull types, each with its own load profile and build.

- [All hull types](https://www.boatbattery.com.au/boats): section index
- [12 ft tinnie](https://www.boatbattery.com.au/boats/tinnie)
- [Bowrider](https://www.boatbattery.com.au/boats/bowrider)
- [Half cabin](https://www.boatbattery.com.au/boats/half-cabin)
- [Offshore centre console](https://www.boatbattery.com.au/boats/offshore-centre-console)
- [Trailer sailer](https://www.boatbattery.com.au/boats/trailer-sailer)
- [38 ft cruising yacht](https://www.boatbattery.com.au/boats/cruising-yacht-38ft)
- [Cruising catamaran](https://www.boatbattery.com.au/boats/catamaran)
- [Houseboat](https://www.boatbattery.com.au/boats/houseboat)
- [Liveaboard](https://www.boatbattery.com.au/boats/liveaboard)

## Brand comparisons

Brand support, documentation and application comparisons.

- [All comparisons](https://www.boatbattery.com.au/compare): section index
- [Enerdrive review](https://www.boatbattery.com.au/compare/enerdrive)
- [Invicta review](https://www.boatbattery.com.au/compare/invicta)
- [Revolution review](https://www.boatbattery.com.au/compare/revolution)
- [KickAss review](https://www.boatbattery.com.au/compare/kickass)
- [iTechworld review](https://www.boatbattery.com.au/compare/itechworld)
- [Amptron review](https://www.boatbattery.com.au/compare/amptron)
- [Renogy AU review](https://www.boatbattery.com.au/compare/renogy-au)
- [enerdrive vs invicta](https://www.boatbattery.com.au/compare/vs/enerdrive-vs-invicta)
- [enerdrive vs revolution](https://www.boatbattery.com.au/compare/vs/enerdrive-vs-revolution)
- [invicta vs revolution](https://www.boatbattery.com.au/compare/vs/invicta-vs-revolution)
- [kickass vs itechworld](https://www.boatbattery.com.au/compare/vs/kickass-vs-itechworld)
- [kickass vs revolution](https://www.boatbattery.com.au/compare/vs/kickass-vs-revolution)
- [amptron vs renogy-au](https://www.boatbattery.com.au/compare/vs/amptron-vs-renogy-au)
- [itechworld vs amptron](https://www.boatbattery.com.au/compare/vs/itechworld-vs-amptron)
- [enerdrive vs kickass](https://www.boatbattery.com.au/compare/vs/enerdrive-vs-kickass)

## Installation and compliance

Wiring, charging, safety and what AS/NZS 3004.2 requires.

- [Install cluster](https://www.boatbattery.com.au/install): section index
- [Marine Battery Refit Quotes: Scope and Comparison Checklist](https://www.boatbattery.com.au/install/battery-refit-quote)
- [Boat Battery Compartment Measurements and Layout Checklist](https://www.boatbattery.com.au/install/battery-compartment-survey)
- [Boat Battery Energy Log: Measure Weekend Power Use](https://www.boatbattery.com.au/install/weekend-energy-log)
- [Boat Fridge Power Consumption: Measure Daily Energy Use](https://www.boatbattery.com.au/install/fridge-energy-budget)
- [Boat Battery Reserve Capacity for Cloudy Days at Anchor](https://www.boatbattery.com.au/install/cloudy-weather-reserve)
- [Boat Solar Panel Shading: Output and Layout Checklist](https://www.boatbattery.com.au/install/solar-shade-audit)
- [Boat Inverter Standby Power: Measure Idle Battery Drain](https://www.boatbattery.com.au/install/inverter-standby-loads)
- [Boat Battery Monitor State of Charge Drift: Causes & Checks](https://www.boatbattery.com.au/install/battery-monitor-drift)
- [Boat Battery Charger Settings Record: What to Document](https://www.boatbattery.com.au/install/charger-settings-register)
- [Marine Lithium Battery Commissioning & Handover Checklist](https://www.boatbattery.com.au/install/commissioning-handover)
- [Boat Lithium Battery Winter Storage Planning Checklist](https://www.boatbattery.com.au/install/winter-layup-plan)
- [Boat Battery Terminal Corrosion: Saltwater Inspection Guide](https://www.boatbattery.com.au/install/saltwater-and-battery-connections)
- [Remote Cruising Battery Spares and Support Checklist](https://www.boatbattery.com.au/install/remote-cruising-spares)
- [Used Boat Lithium Battery Inspection: Records to Check](https://www.boatbattery.com.au/install/used-boat-battery-records)
- [Trolling Motor Lithium Battery Bank Planning Guide](https://www.boatbattery.com.au/install/trolling-motor-bank-planning)
- [Marine DC-DC Chargers: Purpose and Alternator Protection](https://www.boatbattery.com.au/install/dc-dc-charger)
- [Lithium Battery Alternator Overheating: Causes on Boats](https://www.boatbattery.com.au/install/alternator-damage)
- [Marine Lithium Battery Wiring: Cable and Fuse Protection](https://www.boatbattery.com.au/install/cable-and-fusing)
- [Boat Battery Shunt Placement: Wiring and Bypass Errors](https://www.boatbattery.com.au/install/shunt-placement)
- [Lithium Boat Battery Mains Charger Compatibility Checks](https://www.boatbattery.com.au/install/existing-mains-charger)
- [Lithium Boat Battery Ventilation and Fire Safety Planning](https://www.boatbattery.com.au/install/ventilation-and-fire)
- [AS/NZS 3004.2 and Marine Lithium Battery Installations](https://www.boatbattery.com.au/install/as-nzs-3004-2)
- [Boat Insurance and Lithium Batteries: Questions to Ask](https://www.boatbattery.com.au/install/insurer-questions)
- [Outboard Warranty and Lithium Boat Battery Compatibility](https://www.boatbattery.com.au/install/engine-warranty)
- [LiFePO4 Cold Charging on Boats: Temperature Limits](https://www.boatbattery.com.au/install/cold-charging)
- [AGM and Lithium Batteries on a Boat: Separate Bank Design](https://www.boatbattery.com.au/install/mixing-agm-lithium)
- [Marine Battery BMS Explained: Protection and Shutdown](https://www.boatbattery.com.au/install/bms-explained)

## Safety and evidence

Warning signs, emergency priorities, a complete refit checklist and primary Australian sources.

- [Marine lithium safety centre](https://www.boatbattery.com.au/safety): section index
- [Lithium conversion checklist](https://www.boatbattery.com.au/checklist)
- [Australian authority resources](https://www.boatbattery.com.au/resources)
- [Advice limitations and disclaimer](https://www.boatbattery.com.au/disclaimer)
- [Fire, ventilation and the battery compartment](https://www.boatbattery.com.au/install/ventilation-and-fire)
- [What a battery management system does](https://www.boatbattery.com.au/install/bms-explained)

## Boat battery buying questions

The long-form answers to the six that come up most.

- [All answers](https://www.boatbattery.com.au/answers): section index
- [Are Lithium Batteries Allowed on Boats in Australia?](https://www.boatbattery.com.au/answers/lithium-allowed-on-boats-australia)
- [Lithium vs AGM Boat Batteries: Capacity, Weight & Charging](https://www.boatbattery.com.au/answers/lithium-vs-agm-boat)
- [How Long Will a 100Ah Lithium Battery Run a Boat Fridge?](https://www.boatbattery.com.au/answers/how-long-will-100ah-run-a-fridge)
- [Marine Lithium Refit Cost Factors: What Changes the Quote?](https://www.boatbattery.com.au/answers/lithium-boat-battery-cost)
- [Lithium Battery Solar Controller Compatibility on Boats](https://www.boatbattery.com.au/answers/existing-charger-and-solar)
- [Drop-In vs DIY Lithium Batteries for Boats: Pros & Cons](https://www.boatbattery.com.au/answers/drop-in-vs-diy-cells)

## How to do it

One task per page, with the direct answer first and ordered steps underneath.

- [How-to index](https://www.boatbattery.com.au/how): section index
- [How to Plan a Boat Lithium Battery Conversion](https://www.boatbattery.com.au/how/how-to-plan-a-lithium-conversion)
- [Is a Lithium Boat Battery Upgrade Worth It? Decision Guide](https://www.boatbattery.com.au/how/how-to-decide-if-lithium-is-worth-it)
- [How to Budget a Marine Lithium Battery Conversion](https://www.boatbattery.com.au/how/how-to-budget-a-lithium-conversion)
- [12V vs 24V Boat Electrical Systems: How to Choose](https://www.boatbattery.com.au/how/how-to-choose-12v-or-24v)
- [How to Calculate Boat Electrical Loads in Amp-Hours](https://www.boatbattery.com.au/how/how-to-calculate-daily-amp-hours)
- [How to Size a Boat Lithium House Battery Bank](https://www.boatbattery.com.au/how/how-to-size-a-lithium-house-bank)
- [How to Size a Marine DC-DC Battery Charger](https://www.boatbattery.com.au/how/how-to-size-a-dc-dc-charger)
- [How to Size an MPPT Solar Controller for a Boat](https://www.boatbattery.com.au/how/how-to-size-an-mppt-controller)
- [How Many Solar Panels Does a Boat Need? Sizing Steps](https://www.boatbattery.com.au/how/how-to-work-out-how-many-solar-panels)
- [How to Size Boat Battery Cable: Current & Voltage Drop](https://www.boatbattery.com.au/how/how-to-size-battery-cable)
- [How to Choose a Fuse for a Marine Lithium Battery Bank](https://www.boatbattery.com.au/how/how-to-choose-a-fuse-for-a-lithium-bank)
- [How to Compare Marine Lithium Battery Specifications](https://www.boatbattery.com.au/how/how-to-compare-marine-lithium-batteries)
- [Marine Lithium Battery Compliance Documents: What to Check](https://www.boatbattery.com.au/how/how-to-check-a-battery-meets-australian-standards)
- [How to Choose a Marine Electrician for Lithium Batteries](https://www.boatbattery.com.au/how/how-to-find-a-marine-electrician)
- [How to Convert a Boat from AGM to Lithium Batteries](https://www.boatbattery.com.au/how/how-to-convert-from-agm-to-lithium)
- [How to Plan Marine Lithium House Battery Bank Wiring](https://www.boatbattery.com.au/how/how-to-wire-a-lithium-house-bank)
- [How to Install a Boat Battery Monitor and Shunt](https://www.boatbattery.com.au/how/how-to-install-a-battery-monitor)
- [How to Wire a Marine DC-DC Battery Charger](https://www.boatbattery.com.au/how/how-to-wire-a-dc-dc-charger)
- [How to Connect Boat Solar Panels to Lithium Batteries](https://www.boatbattery.com.au/how/how-to-connect-solar-to-a-lithium-bank)
- [How to Keep a Boat Starting Battery Charged with Lithium](https://www.boatbattery.com.au/how/how-to-keep-the-start-battery-charged)
- [How to Mount and Secure Lithium Batteries on a Boat](https://www.boatbattery.com.au/how/how-to-mount-and-secure-batteries)
- [How to Plan Ventilation for a Boat Battery Compartment](https://www.boatbattery.com.au/how/how-to-ventilate-a-battery-compartment)
- [How to Charge Boat Lithium Batteries from an Alternator](https://www.boatbattery.com.au/how/how-to-charge-lithium-from-an-alternator)
- [How to Charge Boat Lithium Batteries from Shore Power](https://www.boatbattery.com.au/how/how-to-charge-lithium-from-shore-power)
- [How to Set LiFePO4 Battery Charging Voltages on a Boat](https://www.boatbattery.com.au/how/how-to-set-lithium-charge-voltages)
- [How to Read Lithium Boat Battery State of Charge](https://www.boatbattery.com.au/how/how-to-read-state-of-charge-on-lithium)
- [How to Store Boat Lithium Batteries Over Winter](https://www.boatbattery.com.au/how/how-to-store-lithium-over-winter)
- [Lithium Boat Battery Care in Australian Heat](https://www.boatbattery.com.au/how/how-to-look-after-lithium-in-australian-heat)
- [Lithium Battery BMS Disconnected? Boat Diagnosis Steps](https://www.boatbattery.com.au/how/how-to-tell-if-your-bms-has-disconnected)
- [Boat Lithium Battery Not Charging: Troubleshooting Steps](https://www.boatbattery.com.au/how/how-to-diagnose-lithium-not-charging)
- [How to Test Lithium Boat Battery Capacity in Amp-Hours](https://www.boatbattery.com.au/how/how-to-test-a-lithium-battery-capacity)
- [How to Test Voltage Drop in Boat Battery Wiring](https://www.boatbattery.com.au/how/how-to-find-voltage-drop)

## Frequently asked questions

Short factual answers, each on its own page.

- [FAQ index](https://www.boatbattery.com.au/faq): section index
- [How many amp-hours do I need on my boat?](https://www.boatbattery.com.au/how/how-to-size-a-lithium-house-bank)
- [Why can I only use 80% of a lithium battery?](https://www.boatbattery.com.au/faq/why-only-80-percent-usable)
- [How long will a 200 Ah lithium battery last on a boat?](https://www.boatbattery.com.au/faq/how-long-will-200ah-last)
- [Can I charge lithium straight from my alternator?](https://www.boatbattery.com.au/how/how-to-charge-lithium-from-an-alternator)
- [What size DC-DC charger do I need?](https://www.boatbattery.com.au/how/how-to-size-a-dc-dc-charger)
- [What size MPPT controller do I need?](https://www.boatbattery.com.au/how/how-to-size-an-mppt-controller)
- [Can I use my existing solar controller with lithium?](https://www.boatbattery.com.au/answers/existing-charger-and-solar)
- [Where does the battery shunt go?](https://www.boatbattery.com.au/install/shunt-placement)
- [What fuse does a lithium bank need?](https://www.boatbattery.com.au/how/how-to-choose-a-fuse-for-a-lithium-bank)
- [Do I need a separate cranking battery?](https://www.boatbattery.com.au/faq/do-i-need-a-separate-cranking-battery)
- [Does a lithium battery compartment need ventilation?](https://www.boatbattery.com.au/install/ventilation-and-fire)
- [Are lithium batteries legal on boats in Australia?](https://www.boatbattery.com.au/answers/lithium-allowed-on-boats-australia)
- [Will my insurer cover a lithium installation?](https://www.boatbattery.com.au/install/insurer-questions)
- [Can I install a lithium battery myself?](https://www.boatbattery.com.au/faq/can-i-install-lithium-myself)
- [How much does a marine lithium conversion cost in Australia?](https://www.boatbattery.com.au/cost)
- [Is lithium cheaper than AGM in the long run?](https://www.boatbattery.com.au/faq/is-lithium-cheaper-than-agm)
- [Which marine lithium battery brand is best?](https://www.boatbattery.com.au/compare)
- [What does LiFePO4 mean, and is it different from lithium-ion?](https://www.boatbattery.com.au/faq/what-does-lifepo4-mean)
- [Can you charge a lithium battery below freezing?](https://www.boatbattery.com.au/install/cold-charging)
- [What does the BMS actually do?](https://www.boatbattery.com.au/install/bms-explained)
- [How many solar panels does my boat need?](https://www.boatbattery.com.au/how/how-to-work-out-how-many-solar-panels)
- [Can I add more batteries to an existing lithium bank later?](https://www.boatbattery.com.au/faq/can-i-add-batteries-to-an-existing-lithium-bank)
- [How long do marine lithium batteries last?](https://www.boatbattery.com.au/faq/how-long-do-marine-lithium-batteries-last)

## About this site

Who we are, how we test, and what we will not do.

- [About us](https://www.boatbattery.com.au/about)
- [Gabriel Machuret, founder](https://www.boatbattery.com.au/about/gabriel-machuret)
- [How we test and how the calculator works](https://www.boatbattery.com.au/methodology)
- [Editorial policy](https://www.boatbattery.com.au/editorial-policy)
- [Affiliate disclosure](https://www.boatbattery.com.au/disclosure)
- [Contact](https://www.boatbattery.com.au/contact)
- [Authority resources](https://www.boatbattery.com.au/resources)
- [Disclaimer](https://www.boatbattery.com.au/disclaimer)
- [Privacy policy](https://www.boatbattery.com.au/privacy)
- [Terms of use](https://www.boatbattery.com.au/terms)
- [Sitemap](https://www.boatbattery.com.au/site-map)

## Machine-readable

- [XML sitemap](https://www.boatbattery.com.au/sitemap.xml)
- [Human sitemap](https://www.boatbattery.com.au/site-map)