- ROI 5-7 years
- Increase autonomy to 90%
- Free energy at night
Why invest in a solar battery for your home?
Maximize your energy independence
Solar batteries allow you to become less reliant on the grid, helping you maintain solar power during outages or periods of high demand, ensuring a more reliable and sustainable energy supply.
Optimize the output of your solar panels
With a home battery, you store inexpensive energy for later use, allowing you to make the most of your self-generated solar power even when the sun isn't shining.
Protect against future price increases
By storing energy in solar batteries, you can lock in your energy costs and protect yourself from potential future increases in electricity prices. This helps ensure long-term savings and stability in your energy expenses.
With a solar battery, you’re not just prepared for the future but also protected against rising energy prices. By storing and using more of your own solar energy, you’re less reliant on the electricity grid. This reduces your exposure to fluctuating energy prices and helps make your energy costs more stable and predictable, even as prices continue to rise.
Optimize the performance of your solar panels by efficiently storing solar energy in a home battery. This battery helps you make the most of your solar energy, not only reducing your energy costs but also ensuring more efficient use of the energy generated by your solar panels.
By using a solar battery, you can use more of your own generated solar energy instead of feeding it back into the grid. This increases your self-consumption, leading to lower electricity bills and more control over your energy usage.
How does a solar battery work?
Flow batteries
Flow batteries come with newer technology and are less common than lithium-ion and flooded lead-acid batteries. They store energy in liquid electrolytes, offer long life cycles, and are able to discharge power completely without getting damaged. However, flow batteries are the most expensive of the three options.
- PROS
- Safer than lithium-ion batteries
- Longer lifespan
- CONS
- The most expensive solar batteries
- Not efficient as lithium-ion batteries
Lithium-ion
batteries
Lithium-ion solar batteries are one of the most popular options in the market. They are known for their long lifespan, deep discharge capabilities, and high efficiency. However, lithium batteries tend to be more expensive than other types of solar batteries.
- PROS
- High-efficiency batteries
- Low maintenance
- Deep discharge capabilities
- Long life span, lasting up to 15 years
- CONS
- Huge initial cost
Flooded lead-acid batteries
These are more affordable off grid solar batteries. However, flooded lead-acid batteries are less efficient than lithium batteries. Plus, they have shorter life spans and require regular maintenance.
- PROS
- Not expensive batteries
- Readily available in the market
- CONS
- Short life span. Only 8 years.
- Regular maintenance required
- Bulky in size
Energy generation
by solar panels
During the day, your solar panels capture sunlight and turn it into electricity. This power runs your home, and any extra energy is stored in a battery for later use.
Storing excess energy
If your solar panels generate more electricity than you need, the surplus charges the battery. The battery holds onto this extra energy, so it’s available when you need it.
Discharging stored energy
When you need power—like at night or on cloudy days—the battery releases the stored energy. It gets converted back into electricity to keep your home running.
How to choose your solar battery?
Choosing the right solar battery can feel overwhelming, but at Voltaicos, we simplify the process by focusing on your unique needs and guiding you every step of the way. Here's how we ensure you make the best choice:
Assessing your energy needs
We start by understanding your household's energy consumption patterns and peak usage times. This helps us recommend solar batteries with the right capacity to match your lifestyle and ensure you have consistent power when you need it most.
Battery lifespan
Our experts explain key factors such as Depth of Discharge (DoD) and Charge Cycles, which influence how long your battery will last. With this knowledge, we help you select a battery that balances durability with performance, ensuring long-term value.
Solar battery costs
Solar batteries come in various price ranges, influenced by their type, brand, and features. We work with you to find a solution that fits your budget while maintaining the high standards Voltaicos is known for.
Considering efficiency and warranty
We focus on efficiency and warranty to ensure you get the best solar batteries for your needs. By assessing round-trip efficiency, peak power output, and warranty terms, we protect your investment and optimize performance.
Talk to a solar
battery expert
Investing in a solar battery solution is an important decision that can significantly improve your home’s energy efficiency and reduce your dependence on the grid. It’s crucial to choose the right system to meet your specific energy needs. Let our highly experienced solar energy experts guide you on what to buy and install for your home.
Book a free consultation today to learn how solar panel batteries can benefit you. Our team will assess your current energy usage, and recommend the best solar battery and solar panel combination to maximize your savings and energy independence.
- Understand how solar batteries maximize savings
- Discover the full potential of your solar system
- Receive a free quote after the interview
Leave your details here
Comprehensive solar energy services
Custom solar installations
As one of the leading solar companies in Portugal, we offer solar power solutions to meet all our client’s energy needs. Whether you want to power your home with sustainable energy from the sun, install a solar carport or just want to buy solar energy equipment, we have you covered. Our solar services include:
Perguntas frequentes
The best battery for a solar system depends on your energy needs, budget, and preferences. The most common options are:
- Lithium-Ion Batteries: These are highly efficient, lightweight, and durable, with a longer lifespan compared to other types. Popular options include Tesla Powerwall, LG Chem, and Huawei Luna.
- Lead-Acid Batteries: A more budget-friendly option, but they have a shorter lifespan and require maintenance.
- Flow Batteries: Ideal for large-scale systems, offering long life cycles and scalability, though they are more expensive.
For most homeowners, lithium-ion batteries are the preferred choice due to their efficiency and long-term cost savings.
The duration a 10kWh solar battery will last depends on your energy consumption:
If you use 1kW per hour, it will last approximately 10 hours. If your household consumes 5kW per hour, the battery will last about 2 hours.
For reference, an average home in Portugal consumes around 8–10kWh daily, meaning a 10kWh battery could potentially power your essential appliances overnight.
For off-grid solar systems, batteries must store enough energy to supply power when there’s no sunlight. The best options are:
- Lithium-Iron Phosphate (LiFePO4) Batteries: These are durable, efficient, and have a longer lifespan, making them the top choice for off-grid systems. Brands like BYD, Pylontech, and Freedom Won are popular.
- Deep-Cycle Lead-Acid Batteries: While cheaper upfront, they require regular maintenance and have a shorter lifespan.
- Flow Batteries: Great for large-scale off-grid systems due to their extensive charge-discharge cycles and scalability.
Lithium-ion batteries are often the best balance of performance, longevity, and cost.
The number of batteries depends on:
- Daily Energy Consumption: Calculate your average kWh usage per day.
- Battery Capacity: For example, if you use 20kWh daily and your battery stores 10kWh, you’ll need at least two batteries.
- Days of Autonomy: For 2–3 days without sunlight, you’ll need more storage.
For most off-grid homes, 2-4 high-capacity lithium-ion batteries are sufficient, though exact needs vary based on energy habits.
The size of the battery required depends on:
- Your Energy Consumption: A typical home might consume 8–15kWh per day.
- Desired Backup Duration: For one full day of backup, you’ll need a battery capacity of 10–15kWh.
- Usage Priority: If you aim to power only essentials (lights, refrigerator, and heating), a 5–10kWh battery may suffice.
For a fully off-grid system, a capacity of 15–30kWh is recommended to account for higher usage and autonomy during cloudy days.
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