Pytes Lithium LifePo4 V5a Battery, 48V 5.12kWh, with heating

Lithium batteries have a known weakness: at sub-zero temperatures they no longer accept charging, so that the cells are not damaged. This model solves the problem with an integrated heating film, which warms the cells before charging them. In practice, it can be installed in a garage, in an outbuilding or in an unheated space, where an ordinary battery would remain blocked in winter. Otherwise it works like any household storage unit: it gathers the panels' energy during the day and gives it back in the evening or during an outage.

The 5.12 kWh cover the evening consumption of a home for lighting, fridge, electronics and small appliances, and if more is needed, identical modules are added. The working current is 75 A continuous, with peaks of 101-120 A for 3 minutes and 121-180 A for 15 seconds, so it also handles appliance start-ups. The heating raises the cell temperature by about 8 degrees C per hour and extends operation into the -18...10 degrees C range, beyond the normal range of -10...50 degrees C. The round-trip efficiency exceeds 95%, meaning that of the energy put into the battery you recover more than 95%. The format is a 3.2U rack, 442 x 530 x 140 mm and 44 kg, with wall or floor mounting; the declared life is a minimum of 6000 cycles at 90% discharge, with a designed service life of up to 20 years.

LFP cells, 51.2 V rated, 100 Ah, 5.12 kWh, working range 47.6-57.6 V, round-trip efficiency over 95%. Recommended and maximum continuous charging/discharging current 75 A; discharge peaks 101-120 A for 3 min and 121-180 A for 15 s. Minimum 6000 cycles at 90% DOD, designed service life up to 20 years. Integrated heating pad, +8 degrees C/h, extended operation -18...10 degrees C, normal range -10...50 degrees C. Rack format 3.2U, 442 x 530 x 140 mm, 44 kg, wall or floor mounting. CAN and RS485 communication, with protocols for most common hybrid inverters. Expansion: 16 units per group (81.92 kWh) and up to 6 groups in a system (491.52 kWh). Certifications: UL9540 Ed.2, UL9540A, UL1973, CE, IEC 62619, UN38.3.

Who it suits

Suitable for a house where the battery must be installed in a garage, cellar, outbuilding or another unheated space and where winters drop below zero degrees, on a 48 V hybrid inverter.

Terms explained

• Heating pad: A heating film mounted inside the battery, which raises the cell temperature before charging, so that they accept current in winter too.
• Round-trip efficiency: How much you recover of the energy you put into the battery; over 95% means the storage losses are small.
• 3.2U rack format: A dimensional standard for technical cabinets; the height is measured in U units, and 3.2U indicates exactly how much space the module takes up in a 19-inch rack.

Technical specifications

Recommended applications

• Residential storage in unheated spaces, garages or outbuildings
• Installations in areas with cold winters, where charging below 0 degrees C is a problem
• Off-grid and hybrid 48 V systems with inverters of various brands
• Rack battery banks for commercial applications

Warranty

10 years (designed service life up to 20 years)

Technical details

Specifications confirmed from the manufacturer's datasheet

Pytes V5a is a low-voltage storage unit with LFP cells, rated voltage 51.2 V, capacity 100 Ah and rated energy 5.12 kWh. The voltage range in operation is 47.6 - 57.6 V, and the round-trip efficiency exceeds 95%.

The recommended and maximum continuous charging and discharging current is 75 A. On discharge, the battery allows peaks of 101 - 120 A for 3 minutes and 121 - 180 A for 15 seconds. The declared service life is a minimum of 6000 cycles at 90% DOD, with a designed service life of up to 20 years.

The distinctive element of the V5a version is the integrated heating pad, which raises the cell temperature by about 8 degrees C per hour and allows operation in the -18...10 degrees C range, where an ordinary LFP battery would not accept charging. The normal operating range is -10...50 degrees C. This function is important for installations in unheated spaces or outdoors.

The format is a 3.2U rack type, with dimensions 442 x 530 x 140 mm and a weight of 44 kg, with wall or floor mounting. Communication is done through CAN and RS485, with protocols for most common hybrid inverters. 16 units can be linked in a group, i.e. 81.92 kWh, and up to 6 groups in a system, i.e. 491.52 kWh. Certifications: UL9540 Ed.2, UL9540A, UL1973, CE, IEC 62619, UN38.3.