Solar Batteries

An off-grid battery system is a self-contained energy storage solution designed for homes or buildings that operate independently of the utility grid. It typically includes renewable energy sources such as solar panels and a battery bank to store electricity, along with other solar powered accessories like a solar charge controller and an inverter to convert DC power into AC for household use.

These systems rely entirely on their own energy generation and storage capabilities, providing reliable power even in remote areas without grid access or for users seeking complete energy independence.

The lifespan of lithium solar batteries varies depending on the type of battery, usage, and maintenance. Generally, lead-acid batteries last around 2 to 3 years, while lithium batteries, such as the Redodo 12V 100Ah LiFePO4 lithium battery, can last significantly longer—up to 10+ years with proper maintenance. These LiFePO4 batteries offer up to 4,000 cycles at 100% depth of discharge, making it a durable choice for off-grid applications.

Yes, solar rechargeable batteries are highly effective for emergency backup power. In the event of a power outage, these off-grid batteries can supply energy to essential appliances and devices, ensuring you have electricity for crucial needs like lighting, refrigeration, and communication. Their ability to store energy from renewable sources and deliver it during outages makes them a reliable backup solution, whether you’re at home or in off-grid locations like a cabin or RV.

To choose the right lithium ion solar battery, start by determining your system voltage (12V, 24V or 48V). Then, calculate your daily energy consumption in kilowatt-hours (kWh). This helps you determine the battery capacity needed. Next, decide how many days of autonomy you want to store energy for cloudy or low-sun days.

Battery type matters too. Lead-acid batteries are cheaper upfront but require maintenance and have a shorter lifespan, while LiFePO4 (Lithium Iron Phosphate) batteries are more expensive but last longer (10+ years) and require little maintenance.

Lithium batteries also take up less space and lighter for the same capacity.

Consider the local climate, as some batteries with low-temp protection perform better in extreme temperatures, and ensure compatibility with your inverter.

Redodo solar battery can be used for both off-grid and grid-tied systems, which differ primarily in their purpose and operation. Off-grid batteries are designed to provide power entirely independently from the utility grid, storing energy generated by renewable sources like solar panels or wind turbines and supplying it to the home when needed. These systems must be sized to meet all of a home's energy needs, including backup storage for periods of low generation.

In contrast, grid-tied batteries are typically used in hybrid systems. Grid-tied batteries are designed to work in conjunction with the grid, offering flexibility but still relying on grid power for the majority of the time.

Lithium-ion batteries are eco-friendly, particularly when paired with renewable energy sources like solar or wind power. Compared to lead-acid batteries, lithium batteries are more sustainable and have a lower environmental impact. Additionally, LiFePO4 batteries like Redodo’s offer superior durability and require less maintenance, making them more eco-friendly options over time.

The number of solar lithium batteries you need for an average home depends on several factors, such as your daily energy consumption, the battery’s capacity, and the number of days of autonomy you require. A typical household in the U.S. uses around 30 kWh per day.

For example, a LiFePO4 battery like the Redodo 12V 200Ah provides around 2.56 kWh of usable capacity at a time. Without accounting for factors like weather variations, efficiency losses, or system inefficiencies, if your household uses 30 kWh daily, you would need about 12 of these batteries (30 ÷ 2.56 ≈ 11.7).

You also need to factor in how many days of autonomy you want. If you want to store enough power for 2–3 days without sunlight, you’ll need to multiply the daily requirement by the number of days you want to be self-sufficient.

Read the blog to learn more how many solar batteries to power a house.

The main differences between LiFePO4 (Lithium Iron Phosphate) and lead-acid batteries for off-grid systems are in lifespan, depth of discharge (DOD), and maintenance requirement.

LiFePO4 batteries, like the Redodo 12V 100Ah battery, can offer 4,000+ times cycles, significantly outlasting lead-acid batteries, which typically last only 200 to 500 cycles. In addition, most LiFePO4 batteries can be safely discharged up to 80-100% of their capacity, while lead-acid batteries should generally be lower than 80% DOD to protect their lifespan.

In terms of weight and size, LiFePO4 batteries are lighter and more compact, providing the same capacity in a smaller battery size. Moreover, LiFePO4 batteries are maintenance-free, unlike lead-acid batteries, which need regular checks on fluid levels, terminals, and equalization charges.

Yes, solar rechargeable batteries are compatible with inverters, they are designed to work together to supply power in off-grid systems, much like RV batteries work with inverters to power appliances during travel or camping. The inverter converts the DC (direct current) power stored in the solar battery into AC (alternating current) power, which is what most household appliances use. Off-grid systems typically require a DC-to-AC inverter, and the specific inverter needs to match the voltage and output power of the battery bank.

For example, if you are using 48V batteries, you will need an inverter rated for 48V input. Additionally, it's important to choose an inverter that can handle the peak power demand of your household appliances. Redodo provides high-quality inverters, including 1000 watt inverter, 2000 watt inverter, and 3000W pure sine wave inverter. The combination of the right solar battery and inverter ensures a stable and efficient off-grid power system, allowing you to store and use energy as needed.

To ensure your lithium solar battery lasts long and operates efficiently in your off-grid system, follow these maintenance tips:

• Regularly check the battery's state of charge (SOC) using a battery monitor to ensure it stays above 20% capacity is recommended.
• Clean the battery terminals every few months with a dry cloth to remove dust and corrosion.
• Check the terminals to ensure they are tightly connected.
• Use a MPPT solar charge controller in charging to prevent overcharging, as this can damage the battery.
• If storing the battery for an extended period, keep it at around 50% charge in a cool, dry place (ideally between 15℃ to 35℃ / 59°F to 95°F).
• Regularly monitor the battery voltage through a multimeter for any faults.