Solar Batteries For Off Grid Solar System
Lithium Solar Batteries
WattCycle’s LiFePO4 deep cycle solar battery stands guard over your home’s power and cuts your electricity bills—even when a midnight thunderstorm knocks out the lights.
Faithful for up to 10 years, design for seamless integration with solar arrays, it offers high cycle life, robust safety, and zero emissions.
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Cost Efficiency
WattCycle's solar batteries are deep cycle LiFePO4 batteries with EV grade A+ cells that can be cycled 5000 - 15,000 times, which is very economical in the long run.
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Reliable Solar Power
With built-in advanced BMS protection, and robust battery housing, WattCycle's solar batteries connecting solar panels and solar controller are perfect for home battery storage without solar.
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100% Deep Discharge
Equipped with EV grade A+ LiFePO4 cells, WattCycle's solar batteries support 5000 - 15.000 cycles of life, more than 10 years lifespan, and 100% depth of discharge, making your off-grid life stable and long-lasting.
![WattCycle Deep Cycle LiFePO4 Battery with smart Bluetooth]()
Real-Time Bluetooth Monitoring
Track charge status and system health anytime via the WattCycle mobile app. Simple, intuitive insights keep you in control of your solar power.
Customize Your Capacity Needs
Choose the best lithium batteries for your home energy storage and off-grid life.
Solar System
The Ultimate Solution for Solar Power
WattCycle 12V 280Ah series solar batteries equipped with EVE LF280K-280Ah grade A+ LiFePO4 cells (rated capacity 280Ah, but initial capacity ≥310Ah) are one of your best solar power sources.
Want to know about 12V 280Ah Mini Bluetooth Battery?
Check out vuaeco’s Review!
Photovoltaic System Accessories
Photovoltaic system components always require various accessories. Solar batteries are the core. Your system will also require photovoltaic panels, solar controllers, inverters, and possibly monitors, busbars, circuit breakers, etc.
Affordable Energy Solutions
WattCycle’s LiFePO4 solar battery seamlessly toggles between grid-feeding and standalone modes. Under normal conditions, excess solar generation is exported to the grid; during outages or peak-rate periods, the system automatically isolates (islanding) and powers your critical loads.
On-Grid
A solar on-grid system, also known as a grid-tied solar system, is linked to both the solar panels and the main grid. This means you can draw power from your panels or the grid, and you can also automatically send excess solar power to the grid.
Off-Grid
An off-grid solar system is a solar panel system that has no connection to the utility grid at all. This means that all of your system's power comes from the panels, so you don't need to rely on an external power source. You can meet your energy needs entirely through solar power and stored batteries.
Hybird
A hybrid solar system is a system that uses the combination and integration of solar power with a backup power source (usually a generator or the main grid) and battery storage to generate electricity.
At WattCycle, we build our lithium batteries using highest quality materials for long-lasting performance. Designed to get the most out of your solar setup, they’re ready for both on-grid and off-grid use. And with zero maintenance required, you can count on steady power—no check, no fuss, just energy independence on your terms.
Best Advice for Charging LiFePO4 with Solar
Array Sizing: Aim for a PV array capacity 1.2–1.5× your lithium battery bank’s watt-hour rating to replenish daily depth of discharge.
Charge Controller Settings: Set bulk/absorption voltage to 14.4 V (for 12 V systems) and float to 13.6 V; enable temperature compensation if available.
Seasonal Adjustments: In low-sun months, reduce discharge depth to 40 %–50 % and consider shifting absorption time longer; in high-sun seasons, you can safely utilize up to 80 % DOD for maximum yield.
Reliable and Long-lasting Solar Power
WattCycle's solar batteries are equipped with automotive grade-A+ LiFePO4 cells and advanced BMS, ensuring top-tier energy performance and long-lasting power output. These high-quality batteries are designed for long-term reliability. Your best home storage power choice!
No Need to Worry about Extreme Weather
Our solar battery combines IP65-rated water and dust resistance with an ultra-durable exterior casing, ensuring reliable operation even in harsh conditions. The sealed construction effectively repels rain, splashes, and airborne particles, while the reinforced shell withstands impacts and environmental stress.
Super Affordable LiFePO4 Energy
WattCycle's affordable and high-quality solar batteries can help you optimize your energy use. This enables efficient use of stored energy throughout the day and night, reducing overall electricity costs. In certain regions, you can also earn money by selling excess energy back to the grid, making the most of your energy storage battery as part of your system.
Fast and Quality WattCycle Service
WattCycle offers fast and free shipping on all European orders. You can receive high-quality batteries quickly and hassle-free. If you need any help, you can always contact our customer service team. Purchase with confidence!
Series-Parallel Guide
| Battery System | Capacity (For Example Using WattCycle 12V 280Ah Mini Batteries) | Appliances and Power Supported | |||
|---|---|---|---|---|---|
| 12V System | 280Ah | 560Ah (2 batteries in parallel) | 840Ah (3 batteries in parallel) | 1120Ah (4 batteries in parallel) | Small devices such as lights, fans, and low-power appliances. |
| 24V System | 280Ah (2 batteries in series) | 560Ah (4 batteries in 2 series and 2 parallel) | 840Ah (6 batteries in 2 series and 3 parallel) | 1120Ah (8 batteries in 2 series and 4 parallel) | Medium-power devices like refrigerators, TVs, and power tools. |
| 36V System | 280Ah (3 batteries in series) | 560Ah (6 batteries in 3 series and 2 parallel) | 840Ah (9 batteries in 3 series and 3 parallel) | 1120Ah (12 batteries in 3 series and 4 parallel) | High-power equipment like air conditioners, pumps, and electric tools. |
| 48V System | 280Ah (4 batteries in series) | 560Ah (8 batteries in 4 series and 2 parallel) | 840Ah (12 batteries in 4 series and 3 parallel) | 1120Ah (16 batteries in 4 series and 4 parallel) | Whole-home energy systems, multiple high-power appliances, and solar energy storage setups. |
12V System
Capacity: 280Ah
2 batteries in parallel: 560Ah
3 batteries in parallel: 840Ah
4 batteries in parallel: 1120Ah
Appliances: Small devices such as lights, fans, and low-power appliances.
24V System
Capacity: 280Ah (2 batteries in series)
4 batteries (2 series, 2 parallel): 560Ah
6 batteries (2 series, 3 parallel): 840Ah
8 batteries (2 series, 4 parallel): 1120Ah
Appliances: Medium-power devices like refrigerators, TVs, and power tools.
36V System
Capacity: 280Ah (3 batteries in series)
6 batteries (3 series, 2 parallel): 560Ah
9 batteries (3 series, 3 parallel): 840Ah
12 batteries (3 series, 4 parallel): 1120Ah
Appliances: High-power equipment like air conditioners, pumps, and electric tools.
48V System
Capacity: 280Ah (4 batteries in series)
8 batteries (4 series, 2 parallel): 560Ah
12 batteries (4 series, 3 parallel): 840Ah
16 batteries (4 series, 4 parallel): 1120Ah
Appliances: Whole-home energy systems, multiple high-power appliances, and solar energy storage setups.
WattCycle Lithium Solar Batteries Benefits
Rapid Recharge
Charges up to 5× faster than conventional lead-acid batteries, so your LiFePO4 solar battery is ready for action well before dusk. It can save your time and improve energy efficiency.
Maintenance-Free Operation
Zero water top-ups or equalization routines: install once, enjoy worry-free energy for years.
Non-Toxic & Recyclable
Leak-proof design and premium materials ensure a safe, eco-friendly footprint—perfect for sustainable rooftops.
Bluetooth Remote Monitoring
Track SOC (state-of-charge), cycle count and performance trends in real time via the WattCycle app, always in control.
Drop-In Replacement
Fits existing lead-acid mounts and runs in parallel—upgrade to a deep cycle solar battery without rewiring hassles.
10+ Year Service Life
Engineered for over 5,000 cycles at 80% DoD (depth-of-discharge), WattCycle lithium battery outlasts other batteries and empowers long-term savings, up to 15000+ cycles at 60% DoD.
Ultra-Low Self-Discharge
Retains over 98 % charge per month, making it ideal for seasonal or backup applications.
Lightweight Construction
Up to 60 % lighter than same storage capacity lead acid batteries, easing transport and installation on rooftops.
Application of Deep Cycle Solar Batteries
Rooftop Solar Installations
Perfect for residential and small-commercial installations, WattCycle’s lithium solar batteries store excess rooftop generation by day and power lighting, HVAC and appliances after sundown—maximizing self-consumption and cutting grid bills.
Server Rack LiFePO4 Solar Battery Backup
Ensures uninterrupted backup for edge data centers and telecom racks, shielding critical IT hardware from voltage dips and outages with instant, clean energy.
Off-Grid Deep Cycle Power
Delivers reliable autonomy for irrigation pumps, sensors and holiday homes—eliminating noisy generators and keeping systems running regardless of grid access.
Telecom & Remote Communications
Supports cell sites, emergency radios and monitoring stations in isolated locations, pairing deep cycle solar battery technology with robust BMS safeguards for continuous connectivity.
Real Stories About WattCycle Solar Batteries
Know More About Solar Battery Information
What is a solar battery?
A solar battery stores excess electricity generated by solar panels. When solar panels are unable to generate enough electricity, such as at night, on cloudy days, and during power outages, you can use the stored energy to power your home.
Which battery is the best for solar?
Lithium iron phosphate battery!
Pros:
- Higher Energy Density: Compared to traditional lead-acid batteries, LiFePO4 batteries are smaller in size, lighter in weight, and have 2X more energy because LiFePO4 batteries have a higher energy density.
- No Maintenance Hassle: LiFePO4 batteries are green and environmentally friendly and do not require frequent cleaning and maintenance.
- High Depth of Discharge (DoD): LiFePO4 batteries support 5000 - 15.000 cycles, 100% DoD, providing more than 10 years lifespan.
- Rapid and Safe Charging: Most LiFePO4 batteries can be fully charged in four hours or less, depending on the capacity of the solar panel used for charging. In addition, lithium-ion batteries have built-in overcharge protection to ensure that overcharging does not damage the battery.
Are lithium solar batteries safe?
Lithium solar batteries are a safer type of battery than traditional lead-acid batteries, although they have the same safety risks as other types of batteries, including overheating and fire.
How long do WattCycle’s solar batteries last?
More than 10 years!
Equipped with EV grade A+ LiFePO4 cells, WattCycle’s solar batteries support 5000 - 15.000 cycles of life and 100% depth of discharge (DoD).
How many WattCycle‘s batteries can I add to my solar system?
WattCycle batteries of different voltages support different numbers of series and parallel connections. The 12V series battery can support up to 16 batteries for a 4P4S connection; the 24V series battery can support up to 8 batteries for a 4P2S connection.
Tips:
- 4P: 4 batteries connected in parallel
- 4S: 4 batteries connected in series
How do I calculate what size solar battery I need?
Solar battery storage capacity depends on your energy consumption and the amount of backup power you require. Whether you want to store a few hours of power or a full day's worth of power, contacting our customer service can help you determine the right battery capacity for your needs.
Can I remotely monitor my WattCycle's solar system?
If you choose WattCycle's smart battery, you can monitor your solar system remotely on your phone via the WattCycle App. If you choose the regular version battery, you will need to use a battery monitor with shunt to monitor your PV batteries.
Which WattCycle model is best for a small off-grid cabin?
For modest loads (lighting, small appliances), our 12V 100Ah deep cycle solar battery provides around 1 kWh usable capacity and is easy to install.
How can I get assistance if I need it?Can I mix different capacities in one system?
While parallel-stacking is supported, we recommend using identical units—such as multiple 12V 280Ah Mini batteries—for SOC balanced charging and optimum lifespan.
Can I expand capacity later if I start with a 12V 100Ah battery?
Absolutely. All WattCycle 12V battery share the same voltage and communication protocols. Add additional 12V deep cycle solar battery in parallel to meet growing energy demands.
