24V Lithium Batteries for Deep-Cycle Power

Yes. The Vatrer 24V 200Ah LiFePO4 battery can replace two compatible 12V 200Ah batteries connected in series, provided your trolling motor supports a 24V lithium power supply.

Both configurations deliver a nominal 25.6V 200Ah and 5,120Wh. A single 24V battery eliminates the series jumper cable and simplifies battery monitoring.

Before switching, verify your motor's input voltage and maximum current requirements. Keep the outboard's starting battery on its separate, appropriately rated circuit rather than using the trolling motor battery for engine starting.

Our Vatrer 24V 200Ah self-heating battery measures 520 × 269 × 220 mm (20.47 × 10.59 × 8.66 in.) and weighs 36.6 kg (80.7 lb).

Measure your battery compartment's usable length, width and height, including space for M8 terminal connections, cable bends and secure mounting. Its 80.7 lb weight also needs proper support, especially in smaller fishing boats.

The battery has an IP65-rated enclosure, meaning it resists dust and water jets but isn't designed for submersion. Mount it securely above standing bilge water and protect the terminals from moisture and accidental short circuits.

Our 24V 200Ah lithium battery stores 5,120Wh. Runtime can be estimated by dividing 200Ah by your motor's average current draw.

• 20A average draw: Approximately 10 hours
• 40A average draw: Approximately 5 hours
• 50A average draw: Approximately 4 hours

These are theoretical runtimes. Keeping a 20% energy reserve reduces the planning estimates to roughly 8, 4 and 3.2 hours respectively.

For a more accurate estimate, check your motor's current draw at the speeds you normally use. Continuous high-speed operation, heavy boat loads and strong currents will shorten runtime. We recommend planning around average consumption rather than the motor's maximum thrust rating.

A standard 12V charger cannot properly charge our single 25.6V LiFePO4 battery. It requires a 24V lithium-compatible charger with a 28.4–29.2V charging profile.

Our recommended charging current for the Vatrer 24V 200Ah is 40A, giving an ideal calculation of five hours from empty. Actual charging takes longer as current tapers near full charge.

If your boat currently uses a two-bank 12V charger for separate batteries, replace that charging arrangement with a suitable 24V output for the single battery. Don't connect an individual 12V charging bank across the full 24V battery or use lead-acid equalization settings.

A standard 12V outboard charging system cannot charge a 24V LiFePO4 battery directly. You'll need a properly configured 12V-to-24V DC-DC lithium converter that supports the required charging voltage.

For example, delivering 20A at 28.8V requires approximately 576W. Assuming 90% converter efficiency and a 13.8V alternator supply, that draws roughly 46A from the 12V charging system.

Check your outboard alternator's available output after accounting for engine and onboard electrical loads. Choose a lower-current DC-DC charger if the remaining capacity is insufficient. Keep the starter battery electrically separated through an appropriate charging arrangement and protect both circuits with correctly rated fuses.

Our 25.6V LiFePO4 battery can supply compatible 24V Victron inverters and charging equipment when the system is configured for the battery's electrical limits.

The Vatrer 24V 200Ah specifies 28.4–29.2V charging voltage and 40A recommended charging current. Set these values within the supported configuration of your Victron charger or MPPT controller.

If your Victron setup operates with user-defined lithium settings, you can configure charging independently and use a compatible external shunt for system-level monitoring. Systems requiring a managed CAN-bus battery handshake need an explicitly supported battery interface.

Our Vatrer 24V 200Ah and 300Ah LiFePO4 batteries both feature a 200A BMS, supporting up to 5,120W of continuous DC output at their nominal 25.6V. 

For example, a 3,000W inverter running at full AC output with 90% efficiency draws approximately 130A at 25.6V, within the 200A BMS rating.

Choose a 24V inverter with a compatible DC input range, and account for startup surges, voltage drops and other connected loads. A 3,000W inverter provides more current headroom than a 5,000W unit operating near the battery's limit.

Yes. Compatible Vatrer 24V LiFePO4 batteries support parallel expansion, increasing total storage capacity while maintaining a nominal 25.6V system voltage.

For example:

• Two 24V 200Ah batteries: 400Ah, providing 10.24kWh.
• Two 24V 300Ah batteries: 600Ah, providing 15.36kWh.

Use matching batteries with the same model, capacity and similar age. Balance their voltages and states of charge before connecting them, and use properly rated busbars, cables and individual battery protection.

Avoid mixing 200Ah and 300Ah batteries in the same parallel bank unless the exact configuration is explicitly approved. Check your model's supported parallel connection limit before expanding the system.

Our self-heating system requires a suitable charging source. It does not continuously heat the battery while disconnected.

When internal cell temperature falls to approximately 0°C (32°F) or below, the BMS redirects incoming charging power to the heating elements. Normal charging resumes after the cells warm to approximately 5°C (41°F).

If charging doesn't begin:

• Confirm the connected charger supports 24V LiFePO4 batteries.
• Check the battery's internal temperature through the Vatrer app.

Ensure the charging source provides sufficient current to activate heating, typical activation requirement is above 5A. Allow time for the internal cells to warm before expecting a normal charging-current reading.

An inverter can shut down even when our battery still reports remaining capacity. The first step is to identify whether the interruption comes from the inverter's voltage protection, wiring or the battery's BMS. Check the Vatrer app for battery voltage, current, temperature and protection alerts immediately after the shutdown.

If the shutdown happens near full charge, verify that your inverter accepts the battery's 28.4–29.2V charging range. Some equipment configured for other battery types may trigger high-voltage protection.

If it happens when a large load starts, measure voltage at the inverter's DC terminals under load. A significant drop compared with battery-terminal voltage points to possible cable, fuse or connection losses. Also check whether load current or startup surge exceeds the battery's 200A discharge limit or the inverter's rating.

Correct the identified voltage setting, wiring loss or overload rather than repeatedly resetting the system without finding the cause.