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Information

Warranty and claims.

We build our batteries to last many years. If something does go wrong, we can solve most problems remotely — and if not, we repair the battery in our workshop. This translation is for information only; the Czech version is binding.

Working draft. The binding terms are those set out in the warranty certificate that we supply with the battery.

Warranty period

We provide a 4-year warranty on the battery cells from the date of sale. The warranty periods for the BMS control unit and other electronics are stated in the warranty certificate, which we supply with every battery together with the manual in Czech. The warranty applies equally to consumers and to businesses.

This does not affect the buyer’s statutory rights arising from defective performance.

How to make a claim

  1. Contact us at baterie@bakom.cz or by phone (+420 603 552 577, +420 602 564 571). Describe what is happening and have the battery serial number ready — you will find it on the label and in the BAKOM BMS app.
  2. Send us the log from the app. The Diagnostics screen in the BAKOM BMS app shows the configured protections and the BMS event log. We can often tell the cause from it straight away.
  3. Remote diagnostics. If needed, a technician will look at the battery remotely — via remote support in the app, which you switch on yourself and can switch off at any time. For Victron systems we can also help via VRM.
  4. Repair in our workshop. If a repair is needed, we will agree with you on handing over or sending the battery to our service centre: Svrčovec 97, 339 01 Dolany. Please do not send the battery without agreeing this with us first.

We will settle a warranty claim without undue delay and, for consumers, within 30 days of the claim being made at the latest, unless we agree otherwise.

What the warranty does not cover

  • changes to the BMS protection settings beyond the user functions of the app, changing the BMS administrator password,
  • modifications to the internal sensing or power wiring and structural modifications to the battery,
  • on the BK16K-RC, tampering with the internal conductor to the fuse or using a fuse other than a Victron MEGA 175 A / 80 V,
  • damage caused by fully discharging the battery and leaving it in a discharged state,
  • operation outside the specifications in the manual (currents, voltages, temperatures), mechanical damage and external influences (overvoltage, moisture, dust),
  • improper installation contrary to the manual.

Using the standard user functions of the BAKOM BMS app (for example switching charging or discharging on and off, or selecting the communication protocol on supported versions) does not void the warranty.

Shipping the battery

Lithium batteries are transported as dangerous goods (UN 3480, ADR class 9). Before shipping, switch the battery off and cover the terminals. We always agree the shipping method and packaging with you in advance.

End of life

At the end of their service life, we take back BAKOM batteries free of charge for environmentally sound disposal. Please contact us to arrange the handover.