On Friday afternoon, July 3, 2026, a catamaran completely burned out and sank in Tiha Bay (Uvala Srednja Lokva) on the island of Hvar. According to multiple media reports, the vessel involved is the Sunreef 60 catamaran “SPICE OF LIFE”, which was available for charter through Marine Project.
You can view the original charter listing here: SPICE OF LIFE – Sunreef 60
Timeline, location, and persons on board
- Time of the fire alert: The fire department received the report at approximately 5:28 PM – 5:30 PM.
- Location: The vessel was anchored in Tiha Bay near Stari Grad on Hvar.
- Persons on board: At the time the fire broke out, there were a total of five people on board – three crew members and two passengers. All of them were able to leave the vessel in time and safely; there were no injuries.
Firefighting operation and sinking
The fire departments of the volunteer fire brigades (DVD) Stari Grad and Hvar responded, supported by a boat from the harbor master’s office. Despite their efforts, the catamaran burned down completely and sank to the seabed in the evening hours.
The vessel: SPICE OF LIFE
According to the charter listing, SPICE OF LIFE is a Sunreef 60 catamaran built in 2025. It accommodates six guests in three cabins and has a crew of three – which matches the number of people reported on board at the time of the fire. The yacht is equipped with two 140 HP Nani engines and features modern amenities including air conditioning and WiFi.
Possible cause of the fire: battery explosion
According to unofficial information, the fire may have been triggered by an explosion of a battery on board. This suspicion gains some relevance given the construction of modern Sunreef yachts, as the shipyard is known for its Eco models, which are equipped with large lithium-ion battery banks. Should this suspicion be confirmed, the catamaran would be part of a broader trend: the number of ship fires caused by lithium-ion batteries is increasing worldwide.
The risk of lithium-ion battery fires on vessels
Lithium-ion batteries, as installed on many modern yachts, carry specific risks:
- Thermal runaway: A defect, short circuit, overcharging, or mechanical damage to a single cell can trigger a chain reaction in which the stored chemical energy is released suddenly and uncontrollably. This reaction often spreads explosively to the entire battery bank.
- Difficult to extinguish: Lithium-ion battery fires are very hard to put out with conventional fire extinguishers because the battery produces its own oxygen. While water can be used for cooling, it often does not reach the actual source of the fire inside the battery. The resulting jet flames can reach several meters in height and temperatures exceeding 1,000 °C (1,832 °F).
- Toxic gases: Such fires release highly toxic gases, including hydrogen fluoride (HF) and carbon monoxide (CO), which pose an acute danger to the crew in the confined spaces of a vessel.
Official investigation
The exact cause of the fire on Hvar will be officially announced after the completion of the police investigation and the on-site inspection (očevid). The currently circulating information regarding the cause of the fire is pure speculation and has not been officially confirmed. It also remains to be clarified through the investigation whether the Sunreef catamaran involved was an Eco model with particularly large battery banks.
5. 07 – Additional speculations circulating online regarding the cause of the fire
While the official investigation is still ongoing, various theories and speculations are being discussed in online forums and among maritime experts. Here are some of the hypotheses that have emerged:
Electrical system failures
Yacht surveyor Ingolf Schneider has weighed in on the discussion, expressing skepticism about the battery explosion theory. He states: “LiFePO4 won’t start a fire. I’m more thinking about loose connections, have had that myself twice, both times the fire alarm went off on time.”
According to Schneider, the culprit in his cases was a Victron MPPT controller – a device used in solar charging systems. He criticizes the quality of the connections in these controllers, describing them as “pure crp”* that can come loose due to the constant vibrations of a boat. He adds that Victron initially denied having problems with these controllers but is now quietly switching to MC4 connectors to address the issue.
Other possible sources of ignition
Schneider and other online commentators have also mentioned additional potential causes:
- Gasoline for the tender or jetski: Stored fuel on board could have leaked or ignited.
- Short circuit in appliances: A faulty wire in a dishwasher or other household appliance on board.
- Cooking accident: The cook may have been working with an open flame, which could have spread.
- Generator failure: The boat was tied off to the shore, so the main engines were not running, but the generator probably was. A burst fuel line on the generator could have caused a fire.
- Flammable solvents: Someone may have been working with acetone or other highly flammable cleaning agents.
Need for crew testimony
Schneider emphasized the importance of the crew’s account, noting: “I hope the crew can shed a light on this incident, they were onboard when it started.” Since all crew members survived and were able to evacuate safely, their statements will be crucial in determining the actual cause.
Official investigation pending
It is important to emphasize that all of these theories are pure speculation and have not been confirmed by any official source. The exact cause of the fire will only be known after the completion of the police investigation and the on-site inspection (očevid). The current discussion reflects the uncertainty and the many potential failure points on a modern, technically complex yacht like the Sunreef 60.
Here is the revised article in English, with the battery theory clearly emphasized as speculation at multiple points.
Speculation Around Lithium Batteries – and What We as a Yacht Management Company Are Learning from It
On the Croatian island of Hvar, a Sunreef 60 catamaran recently sank after a fire broke out on board. While the exact cause of the fire remains entirely unclear at this stage, and early online speculation about a possible battery explosion is purely hypothetical, the incident nonetheless draws attention to a topic that is becoming increasingly significant in the yacht industry: the handling of lithium-ion technology on board.
Lithium Batteries: A Double-Edged Sword in Modern Yacht Equipment
Regardless of the actual cause of the Hvar tragedy – the speculation about a possible battery explosion is, so far, entirely unsubstantiated – the case highlights just how much the discussion around fire safety and modern energy storage has come into focus. More and more catamarans, particularly modern models like Sunreef’s “Eco” variants, come factory-equipped with powerful lithium battery banks. These enable longer autonomy, quieter operation, and more environmentally friendly cruising – clear advantages. However, the technology also carries risks. TÜV Rheinland warns: “Thermal stress, manufacturing defects, damage, and improper handling can lead to fires.” The situation becomes particularly critical when lithium-ion batteries are exposed to temperatures above 60 degrees Celsius. This can trigger a so-called “thermal runaway” – a process that can result in a fire that is extremely difficult to extinguish.
When Summer Sun Turns the Engine Room into an Oven
Whether batteries actually played a role in the Hvar incident is pure speculation – investigations are still ongoing. However, this very discussion has prompted us as a yacht management company to highlight a concrete danger we observe on many vessels: at outside temperatures of 37 degrees Celsius, which are not uncommon in the Croatian summer, temperatures inside enclosed technical compartments, engine rooms, or behind bulkheads – where batteries and electronics are installed – can quickly rise to over 60 degrees. This heat buildup, irrespective of the current speculation surrounding the Sunreef 60, poses a real, physical threat to installed lithium batteries – and is therefore an issue that affects every owner.
Modern catamarans in the Sunreef 60 class often feature battery capacities ranging from 22.4 kWh to over 56 kWh to ensure onboard comfort – from air conditioning and entertainment systems to electric propulsion. This high energy density makes the batteries particularly dangerous in the event of overheating. If one unit fails, a chain reaction can occur, with multiple storage units igniting each other.
Our Solution: Proactive Cooling as a Safety Standard
Regardless of what ultimately happened on Hvar – for us, the safety of our owners and crews is the top priority. For this reason, we have implemented strict safety measures across our yacht management operations. We have now introduced active cooling for the engine rooms and the battery and technical compartments of the catamarans we manage. This measure is designed to ensure that the critical temperature threshold of 60 degrees Celsius is not reached or exceeded, even under extreme conditions. For us, this is the only responsible way to handle this sensitive technology, ensuring the safety of guests and the preservation of the yacht’s value – whether or not batteries were the cause in any specific case.
Water Toys: The Underestimated Risk
The danger, however, does not come only from the large battery banks in the hull. Increasingly popular water toys such as e-foil boards, jet surfboards, or electric diving equipment are also equipped with powerful lithium batteries. These are often stored and charged on deck in intense heat – an additional, often underestimated fire risk that is frequently overlooked in risk assessments. Here too, we emphasize: this is not about the specific cause of the Hvar fire, but about general risks we are aware of and which we aim to minimize through preventive measures.
Conclusion: Safety Requires Tailored Concepts – Regardless of the Individual Cause
The fire on Hvar is a tragic incident whose cause has yet to be determined. As long as investigations continue, all theories – particularly those about exploding lithium batteries – remain pure speculation. Nevertheless, the case serves as a reminder that the risks posed by high-performance batteries under extreme heat conditions are real. It is essential to be aware of these risks and to minimize them through appropriate safety concepts. This includes not only professional installation and maintenance but also passive and active heat protection for sensitive components. A professional yacht management service should now make these aspects an integral part of its offering, to provide owners and crews with a safe and worry-free experience on board – completely independent of current speculation about individual accidents.
The General Problem with Lithium Batteries on Yachts – Exposed to Extreme Vibration, G-Forces, and Temperature Swings
The used batteries we tested showed a drastically reduced capacity. Instead of the expected 200 amp-hours (Ah), our measurements revealed values as low as 46 to 90 Ah. This massive performance loss is particularly critical because marine batteries are subjected to some of the harshest operating conditions imaginable: permanent, high-frequency vibration from the engine and hull, violent pounding from waves, extreme G-forces during heavy seas and emergency maneuvers, and severe temperature fluctuations ranging from freezing cold in winter harbors to scorching heat in engine compartments under full summer sun. These combined stresses push even high-quality lithium cells to their absolute limits. In every single unit we examined, we discovered complete cell failure.
Analysis & Root Causes
After opening the battery housings, the following damage patterns became evident:
Massive Cell Degradation: The individual cells showed severe signs of wear, far beyond what their age would suggest.
Staggering Failure Rate: Detailed resistance measurements revealed that 71 % of all cells registered 0 volts – meaning they were completely dead.
Overheating Due to Uneven Load Distribution: The remaining functional cells were forced to carry the entire load alone, leading to rapid overheating, which in turn accelerated their own degradation in a self-reinforcing downward spiral.
Design & Manufacturing Deficiencies: We suspect that uneven current distribution among parallel-connected cells, substandard cell quality, or faulty factory configurations contributed to the early failures. Additionally, over time, mechanical connections may have loosened due to “plastic creep” – the gradual deformation of the plastic housing under continuous vibration and mechanical stress – further compromising electrical contact.
Recommendations for Users
We want to stress emphatically that a simple voltage check is completely insufficient to detect this issue – because these batteries often still display a seemingly normal voltage, even though numerous cells have already failed.
Therefore, we strongly recommend all yacht owners with lithium batteries to take the following steps:
Perform a Proper Capacity Test: This is the only reliable method to determine whether individual cells have already dropped out. A multimeter reading alone gives you a false sense of security.
Check Your Warranty: Since high-quality lithium batteries should still retain over 80 % of their nominal capacity even after several years, we urge you to file a warranty claim if your test results are significantly worse. In our case, the failure rate among tested units was a shocking 100 %.
