Batería doméstica Vida útil: How Long Does Your Battery Last?

How long does a batería doméstica last?

The vida útil of a batería doméstica is one of the most important factors in your purchasing decision. The good news: modern LFP batteries last 15 to 25+ years. That's longer than most hogar appliances and comparable to the vida útil of paneles solares.

But what exactly does vida útil mean for a battery? A battery doesn't simply stop working one day. The capacity gradually decreases over the years — this is called degradation. In this article, we explain how degradation works, which factors contribute to it, and how you can maximise the vida útil.

How does degradación de la batería work?

Degradación de la batería is the gradual loss of capacidad de almacenamiento over time. A 10 kWh battery may only have 8 kWh of available capacity after 10 years. There are two main forms of degradation:

Cycle degradation

Every time your battery charges and discharges (a cycle), it loses a tiny amount of capacity. An LFP battery is good for 6,000 to 10,000+ ciclos before capacity drops to 80%. With daily use (1 cycle por día), this means 16-27 years. With more intensive use (2 ciclos por día, e.g. with tarifas dinámicas), this works out to 8-14 years.

Calendar ageing

In addition to ciclos, a battery also loses capacity simply through time. Even if you don't use the battery, chemical degradation takes place. For LFP batteries, calendar ageing is minimal: less than 2% por año at normal temperatures. For NMC batteries, this is higher: 3-5% por año.

LFP vs NMC: vida útil comparison

The type of battery chemistry has a major impact on vida útil:

This is one of the most important reasons why HES exclusively sells LFP batteries. The longer vida útil translates directly into lower costs per kWh over the total vida útil.

Factors that affect vida útil

The following factors influence how long your battery lasts:

• Temperature: the ideal operating temperature is 15-25°C. Heat (above 40°C) and frost (below -10°C) accelerate degradation
• State of Charge (SoC): constantly being at 100% or 0% is unfavourable. Most BMS systems automatically maintain a buffer
• Charging speed: fast charging generates more heat and accelerates degradation. Baterías domésticas typically charge slowly (C-rate 0.5-1C), which is optimal
• Profundidad de Descarga (DoD): the deeper you discharge, the more wear per cycle. LFP batteries can fortunately handle 90-100% DoD without significant damage
• Quality of the BMS: a good Battery Management System protects against overloading, overheating and deep discharge

Practical tips to extend the vida útil

Although modern baterías domésticas require little mantenimiento, you can maximise the vida útil with these tips:

• Place the battery in a cool, dry location: avoid direct sunlight and spots near heat sources
• Keep the firmware up to date: manufacturers regularly optimise the BMS via actualización de firmwares
• Avoid extremes: don't leave the battery at 100% or 0% for extended periods. Set charging limits via the app if needed
• Ensure ventilation: at least 10 cm of space around the unit for air circulation
• Monitor the health: regularly check the State of Health (SoH) in your battery's app

Garantía and vida útil

Most manufacturers offer warranties that reflect the vida útil. Anker SOLIX provides 10-15 years garantía with a minimum of 70% capacity. Dyness and Pylontech offer 10 years with a minimum of 60% capacity. These are conservative warranties — in practice, the batteries often perform better.

After the garantía period expires, the battery simply continues to work. The only difference is that you can no longer claim from the manufacturer if the capacity drops below the garantía threshold.

Conclusion

Modern LFP baterías domésticas have an impressive vida útil of 15-25+ years. With minimal mantenimiento and proper placement, you get the most out of your investment. The total cost per stored kWh decreases with every additional year your battery lasts.

Curious which batería doméstica lasts the longest for your usage? Request free advice or compare the specifications in our webshop.