All you need to know about lithium batteries for your solar system. Making the best choice for you

Should I choose a lithium battery for my solar system?

Today, lithium batteries are at the heart of modern solar power systems. High-performance, long-lasting and efficient, they are an essential solution for maximizing self-consumption.
But are they always necessary? And how do you choose the right capacity for your needs?
In this article, we'll help you find out.

• High performance: With an efficiency of over 95%, they maximize the energy produced by your solar panels.
• Exceptional longevity: Up to 7,000 cycles, i.e. 15 to 20 years of use depending on conditions.
• Fast recharging: They recharge faster, which is ideal for making the most of sunny days.
• Compact and lightweight: Perfect for installations where space is limited, or for mobile applications such as motorhomes.

However, their initial cost can be a drag on some budgets. But thanks to their longevity and reliability, they are a profitable investment in the long term.

Which capacity to choose according to your consumption habits?

Choosing the right battery capacity depends above all on your lifestyle and energy requirements. Here are a few concrete examples to guide you:

1. Telecommuters

If you work from home, your energy consumption is mainly diurnal (computers, lighting, heating or air conditioning). You use the energy produced by your solar panels directly during the day, which reduces your storage requirements.
Recommended capacity: A 3 to 5 kWh battery may be sufficient.

2. Families away during the day

For a household where everyone is in the office or at school during the day, consumption tends to be concentrated in the evening (lighting, household appliances, TV). In this case, a larger battery is required to cover night-time needs.
Recommended capacity: A 5 to 10 kWh battery is ideal.

3. Second homes or nomadic applications

For second homes or motorhomes, the priority is often on lightness and modularity. Lithium batteries are ideal for these uses, thanks to their compactness.
Recommended capacity: Varies according to equipment (2 to 5 kWh for basic needs).

Comparison with other technologies

Although lead-acid or GEL batteries are cheaper to buy, they have several major drawbacks:

• Limited service life (500 to 1500 cycles).
• Lower energy efficiency (around 80%).
• Require regular maintenance.

If you're looking for a long-lasting, high-performance solution, lithium batteries are clearly the best choice.

Which battery to choose?

The choice of battery depends above all on your habits and priorities (budget, desired autonomy).

Here's a quick summary to help you: