ENERGY BILLS ARE ON THE RISE - Call us on 0800 009 6625 to reduce your energy usage today!

solar panel battery replacement

Do solar batteries have to be replaced?

Solar panel battery replacement is vital to any solar panel power system. Solar energy is the most cost-effective and environmentally clean option. The solar panel captures energy from the sun and stores it in solar batteries after installation. It sounds straightforward, but do you know whether or not your battery is likely to fail?

Expiry date

Each item has its own expiration date. Others are governed by the standard of quality and maintenance treatment provided. This also applies to solar batteries. The majority of solar battery manufacturers claim that their batteries may endure for 30 years or more without requiring replacement. However, this is not always the case. What’s causing it?


Most people think that batteries don’t need any maintenance. The fact is that they do. If you don’t take care of your batteries, they may get damaged.

  • Solar batteries require a fluid refill every so often to keep the lead oxide plates from drying. The ideal refill solution is distilled water, which does not react with the plates.
  • If you want your battery to last longer, it must be cleaned on a regular basis. A dirty solar panel will hamper the battery’s charging process.


It’s conceivable that solar energy may cause battery overcharge. You might not realize it is a hazardous thin when the battery is overcharged, causing the plates to burst and/or worse, erupt.

  • It is better to invest in high-quality maintainers to avoid an overcharge. When the battery is fully charged, maintainers or battery tenders automatically turn off any current from reaching the battery.
  • Check for a hot spot on your solar panel. Hot spots concentrate most of the sun’s heat, so all of the energy goes into the solar battery, which can lead to overcharging.

Battery is drained

It’s highly probable that a drained battery won’t make it to its expiration date. The electrolytes plates dry up when the battery is totally depleted, and continual draining eventually destroys the cell.

  • Invest in a solar battery trickle charger to ensure that your batteries are charged even on bad weather.
  • If the solar battery tender senses that the battery is not being used, it stores some extra charge on the battery to prevent it from depleting.
  • Place the solar panel in an area that is receiving direct sunlight. When it comes to solar energy, there are a variety of factors to consider, such as light and shade.
  • When purchasing a solar battery, be wary of those that have been in storage for more than six months. These batteries do not retain power for long.
  • Make sure the solar lights are correctly connected. Some systems, for example, may reverse the solar charging process, resulting in a discharge.
  • During installation, your solar sensor should be functional throughout. For charging, the solar lights are automatically turned off via a solar sensor.

Avoid low quality batteries

It’s an easy decision: low-quality goods can’t keep you going for long. A low-cost solar battery lacks essential characteristics that allow your battery to endure longer.

  • Invest in a high-quality battery. High-quality batteries may retain charge for a long time. Their discharge rate is also low.
  • Before you make a purchase, read customer evaluations. This way, you’ll know what to expect from the battery you choose.

When do I need to change my solar battery system

There are several reasons to change your solar batteries. One of them is to avoid the annoyance of being in the dark. Below are some of the most frequent indications that it’s time to replace your battery.

  1. If you are experiencing a pool of liquid near the battery, it is likely that your battery is leaking.
  2. If the battery is unable to light your home for a full night. This implies that the battery has run out of charge.
  3. When the battery is not completely charged
  4. If the bottom of your battery has discoloration, there is a problem with it.
  5. Rechargeable batteries have a lifespan of four years, after which they must be replaced.
  6. When the battery has finished its duty cycle.
  7. You may also change the battery if you’re buying more high-quality batteries.

How can we help?

At Evergreen Solar Power we have the expertise and also the knowledge to know what it takes to replace an existing solar panel battery system with a high quality lasting one. Call us on 0800 0096625 or email us at for further details on how we can help.

If ever in doubt, do not attempt to change the solar panel battery system yourself, please call an expert.

    Verified By:
    Our Payment Plans

    Pay for work over a twelve month period using our 0% interest free payment option after deposit has been paid. Payments are taken via Direct Debit using GoCardless which is completely paperless and hassle free.
    For more information on our 0% interest free options, call us on 0800 0096625 or drop us an email at
    Additionally, you can contact us via our form submission.