SRNE SR-MC2450 12/24V-50A MPPT Solar Charge Controller

Victron Energy LiFePO4 Battery 12,8V/200Ah Smart

The Victron Energy LiFePO4 Battery 12,8V/200Ah Smart is extraordinarily high-performance batteries. It needs to be used in conjunction with the Victron BMS control system. Lithium-iron-phosphate (LiFePO4 battery or LFP) is the safest of the mainstream li-ion battery types. Check the full specifications of Victron Energy LiFePO4 Battery 12,8V/200Ah Smart below

VOLTAGE AND CAPACITY

• Nominal voltage 12,8V
• Nominal capacity @ 25°C* 200Ah
• Nominal capacity @ 0°C* 160Ah
• Nominal capacity @ -20°C* 100Ah
• Nominal energy @ 25°C* 2560Wh

CYCLE LIFE (capacity ≥ 80% of nominal)

• 80% DoD 2500 cycles
• 70% DoD 3000 cycles
• 50% DoD 5000 cycles

DISCHARGE

• Maximum continuous discharge current 400A
• Recommended continuous discharge current ≤200A
• End of discharge voltage 11V

OPERATING CONDITIONS

• Operating temperature Discharge: -20°C to +50°C,  Charge: +5°C to +50°C
• Storage temperature -45°C to +70°C
• Humidity (non-condensing) Max. 95%
• Protection class IP 22

CHARGE

• Charge voltage Between 14V/28V and 14,4V/28,8V (14,2V/28,4V recommended)
• Float voltage 13,5V/27V
• Maximum charge current 400A
• Recommended charge current ≤100A

OTHER

• Max storage time @ 25°C* 1 year
• BMS connection Male + female cable with M8 circular connector, length 50cm
• Power connection (threaded inserts) M10
• Dimensions (hxwxd) mm 297 x 425 x 274
• Weight 42kg

Why lithium-iron-phosphate?

Lithium-iron-phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage of an LFP cell is 3,2V (lead-acid: 2V/cell). A 12,8V LFP battery, therefore, consists of 4 cells connected in series; and a 25,6V battery consists of 8 cells connected in series.

Rugged

Lead-acid batteries will fail prematurely due to sulfation:

• If it operates in deficit mode during long periods of time (i.e. if the battery is rarely, or never at all, fully charged).

• If it is left partially charged or worse, fully discharged (yacht or mobile home during wintertime).

LFP batteries do not need to be fully charged. Service life even slightly improves in case of partial charge instead of a full charge. This is a major advantage of LFP compared to lead-acid. Other advantages are the wide operating temperature range, excellent cycling performance, low internal resistance and high efficiency (see below). LFP is therefore the chemistry of choice for very demanding applications.

Efficient

In several applications (especially off-grid solar and/or wind), energy efficiency can be of crucial importance. The round trip energy efficiency (discharge from 100% to 0% and back to 100% charged) of the average leadacid battery is 80%. The round trip energy efficiency of a 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 is required (battery operating in 70% to 100% charged state). In contrast, a 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 when compared to lead-acid. But 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. Very useful to localize a (potential) problem, such as cell imbalance.