LiFePO4 battery 25,6V/200AH - Smart - a

Victron Energy Lithium Battery Smart batteries are Lithium Iron Phosphate (LiFePO4) batteries and are available in 12.8 V or 25.6 V in various capacities. They can be connected in series, parallel, and series/parallel, so that a battery bank can be built for system voltages of 12 V, 24 V, or 48 V.

The maximum number of batteries in one system is 20, which results in a maximum energy storage of 84 kWh in a 12 V system and up to 102 kWh in a 24 V and 48 V system.

A single LFP cell has a nominal voltage of 3.2 V. A 12.8 V battery consists of 4 cells connected in series, and a 25.6 V battery consists of 8 cells connected in series.

Why Lithium Iron Phosphate?

Rugged

A lead-acid battery will fail prematurely due to sulfation:

• If it operates in deficit mode for long periods (i.e., if the battery is rarely, or never, fully charged).
• If it is left partially charged or, worse, fully discharged (e.g., in a yacht or mobile home during winter).

An LFP battery:

• Does not need to be fully charged. Service life even slightly improves in the case of a partial charge instead of a full charge. This is a major advantage of LFP compared to lead-acid.
• Other advantages include a wide operating temperature range, excellent cycling performance, low internal resistance, and high efficiency (see below).

LFP is therefore the chemistry of choice for demanding applications.

Efficient

• In several applications (especially off-grid solar and/or wind), energy efficiency can be crucial.
• The round-trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average lead-acid battery is 80%.
• The round-trip energy efficiency of an LFP battery is 92%.
• The charge process of lead-acid batteries becomes particularly inefficient when the 80% state of charge has been reached, resulting in efficiencies of 50% or even less in solar systems where several days of reserve energy are required (battery operating in 70% to 100% charged state).
• In contrast, an LFP battery will still achieve 90% efficiency under shallow discharge conditions.

Size and Weight

• Saves up to 70% in space.
• Saves up to 70% in weight.

Expensive?

• LFP batteries are expensive compared to lead-acid. However, in demanding applications, the high initial cost will be more than compensated by longer service life, superior reliability, and excellent efficiency.

Bluetooth

• With Bluetooth, cell voltages, temperature, and alarm status can be monitored.
• Instant readout: The VictronConnect App can display the most important data on the device list page without the need to connect to the product.
• Very useful for localizing a (potential) problem, such as cell imbalance.