As more businesses and homeowners turn to solar energy storage, understanding the technical specifications of LiFePO4 batteries becomes essential. Whether you're a B2B solar buyer new to the industry or a homeowner installing your first home solar battery system, terms like energy, power, DoD, C-Rate, and cut-off voltage can be confusing.
In this guide, we’ll break down the key specifications of a typical LiFePO4 solar battery—using the YouthPOWER 5kWh 48V/51.2V 100Ah LiFePO4 Powerwall battery as an example—so you can make informed decisions with confidence.
Key Specifications Explained
| Model No | YP48100-4.8KWH V2 |
| YP51100-5.12KWH V2 | |
|
Nominal Parameters |
|
| Voltage | 48 V/51.2V |
| Capacity | 100 Ah |
| Energy | 4.8 / 5.12 kWh |
| Dimensions (L x W x H) | 740*530*200mm |
| Weight | 66/70kg |
|
Basic Parameters |
|
| Life Time(25℃) | 10 Years |
| Life Cycles(80% DOD, 25℃) | 6000 Cycles |
| Storage Time & Temperature | 5 months @ 25℃; 3 months @ 35℃; 1 month @ 45℃ |
| Lithium Battery Standard | UL1642(Cell), IEC62619, UN38.3, MSDS ,CE, EMC |
| Enclosure Protection Rating | IP21 |
|
Electrical Parameters |
|
| Operation Voltage | 48 Vdc |
| Max. Charging Voltage | 54 Vdc |
| Cut-Off Discharge Voltage | 42 Vdc |
| Max. Charging And Discharging Current | 100A (4800W) |
| Compatibility | Compatible with all standard off-grid inverters and charge controllers. Battery to inverter output sizing keep 2:1 ratio. |
| Warranty Period | 5-10 Years |
| Remarks | Youth Power wall battery BMS must be wired in parallel only.Wiring in series will void the warranty. |
| Finger Touch Version | Available only for 51.2V 200AH, 200A BMS |
1. Energy (kWh)
What it means: Energy refers to the total amount of electricity the solar battery storage can store and deliver.
Example: The YouthPOWER battery has a capacity of 4.8 kWh or 5.12 kWh, depending on the model. This means it can power a 1kW device for nearly 5 hours.
2. Voltage (V) & Capacity (Ah)
What it means:
• Voltage (V) is the electrical pressure.
• Capacity (Ah) is the current the solar storage battery can deliver over time.
Example: A 48V/51.2V, 100Ah battery can theoretically supply 100 amps for one hour at its rated voltage.
3. Max. Charging Voltage & Cut-Off Discharge Voltage
What it means:
• Max. Charging Voltage (54V) is the highest voltage the solar energy battery should be charged to. Exceeding this can damage the battery.
• Cut-Off Discharge Voltage (42V) is the lowest safe voltage before the battery should be disconnected to avoid over-discharging.
4. Depth of Discharge (DoD)
What it means: DoD indicates how much of the battery’s capacity has been used. A higher DoD means more usable energy.
Example: YouthPOWER batteries support 80% DoD for 6000 cycles. This means you can use 80% of the stored energy without significantly shortening its life.
5. C-Rate
What it means: The C-Rate describes how quickly a battery can be charged or discharged relative to its capacity.
Example: A 100A max current on a 100Ah battery is a 1C rate. This means it can be fully charged or discharged in about one hour.
6. State of Charge (SOC) & State of Health (SOH)
What it means:
• SOC is like a fuel gauge—it shows the current battery charge level.
• SOH reflects the battery’s condition over time compared to its original state.
7. Life Cycles & Warranty
What it means:
Life cycles refer to how many charge-discharge cycles the lithium battery storage can handle before its capacity drops to 80%.
Example: 6000 cycles at 80% DoD means over 16 years of daily use.
Warranty: YouthPOWER offers a 5-10 year warranty, reflecting strong product reliability.
8. IP Rating
What it means: Ingress Protection rating indicates resistance to dust and water.
Example: IP21 means the battery is protected against solid objects and dripping water.
Compatibility & Installation Notes
YouthPOWER LiFePO4 solar batteries are compatible with all standard off-grid inverters and charge controllers.
Follow the 2:1 ratio rule for battery-to-inverter output sizing.
Parallel wiring only—series connection will void the warranty.
Conclusion
Reading a LiFePO4 battery datasheet doesn’t have to be intimidating. By understanding these key specs, you can better evaluate products, plan your solar system, and maximize your investment.
At YouthPOWER, we design our LiFePO4 solar batteries with clarity, reliability, and user-friendliness in mind. If you’re looking for a 5kWh 48V/51.2V 100Ah LiFePO4 Powerwall battery backed by robust specs and a long-term warranty, explore our range today.
FAQs: Your Quick Reference Guide
Q1. What's the difference between 4.8kWh and 5.12kWh models?
A1: The 5.12kWh model uses a higher nominal voltage (51.2V). With the same 100Ah capacity, this results in more total stored energy (51.2V x 100Ah = 5.12kWh).
Q2. How long will this solar battery power my appliances?
A2: First, check your appliance's wattage. Then, use this formula: (Battery Energy in kWh / Appliance Power in kW) = Hours of runtime. For a 500W load on a 5.12kWh battery: 5.12 / 0.5 = ~10.24 hours (at 100% DoD, though we recommend 80% DoD for longevity).
Q3. Can I connect these LiFePO4 home batteries in series?
A3: No. The YouthPOWER BMS is designed for parallel connection only. Wiring in series will damage the BMS and void your warranty. For higher voltage systems, you need a compatible high-voltage battery.
Q4. How can I maximize my battery's lifespan?
A4: Avoid consistently discharging to 100% DoD. The 80% DoD guideline is ideal. Also, keep the battery in a cool, dry place, as high temperatures (like 45°C) significantly reduce storage life and performance.
Q5. Is the battery safe for indoor use?
A5: Yes. It complies with UL1973, IEC62619, UN38.3, and CE standards, ensuring high safety for residential and commercial use.
Post time: Dec-05-2025