1KVA-5KVA Solar Lithium Battery Storage for Home System
Model: LBP-bank series
Voltage: 12V 24V 48V
Capacity: 50Ah, 80Ah, 120Ah, 160Ah, 200Ah
application: off grid solar power system for home, commercial, hospital, communication, ect
●Choose from Brand (CATL, BYD) lithium iron phosphate battery cell to assemble
● With intelligent software Battery Management System (BMS)
● With integrated cell balance
● Can be series and parallels connected
● Long lifespan, free maintenance, high energy density, safty
● Sealed in Iron case, with more than 30A on/off switch, waterprood IP65
Why lithium iron phosphate (LiFePO4)?
Lithium iron phosphate (LiFePO4 or LFP) is the safest of the mainstream li-ion battery types. The nominal voltage of a 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.
A LFP battery does 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.
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 lead-acid battery is 80%. The round trip energy efficiency of a lithium 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 lithium 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
lithium 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.
solar lithium batteries are easier to charge than lead-acid batteries. The charge voltage may vary from 14 V to 15 V (as long as no cell is subjected to more than 4.2 V), and they do not need to be fully charged. Therefore several batteries can be connected in parallel and no damage will occur if some batteries are less charged than others.
With or without Battery Management System (BMS)?
1.A lithium battery cell will fail if the voltage over the cell falls to less than 2.5V (note: recovery by charging with a low current, less than 0.1C, is sometimes possible).
2.A LFP cell will fail if the voltage over the cell increases to more than 4.2V. 3. The cells of a LFP battery do not auto-balance at the end of the charge cycle.
In addition to cell balancing, a BMS will:
-Prevent cell under voltage by timely disconnecting the load. -Prevent cell overvoltage by reducing charge current or stopping the charge process. -Shut down the system in case of over temperature.
The BMS will:
1.Disconnect or shut down the load whenever the voltage of a battery cell falls to less than 2.5V. 2.Stop the charging process whenever the voltage of a battery cell increases to more than 4.2V. 3.Shut down the system whenever the temperature of a cell exceeds 50°C.