We are sometimes presented with unusual situations caused by users installing strips improperly on boats. While it's entirely possible to do, many people don't understand the disastrous implications of wiring strips incorrectly to their power source. If done poorly, you place yourself at serious risk of fires breaking out.
LED strips are primarily designed for domestic usage, requiring suitable Constant Voltage drivers which can maintain low currents and are designed with safety in mind. These strips typically range in 12V and 24V respectively. The problem faced when installing these on boats is that battery voltage varies and can cause serious spikes in voltage when charging. Once your battery goes beyond the 12v or 24v (and boats typically range between 13-14.4v or 26-28.8v) threshold it will invariably burn out any LED diodes or worse.
You can therefore introduce a DC "Constant Voltage" regulator to effectively combat this issue. Moreover, LED strips always run warm; the higher the watts per metre, the faster they exude heat and so placing them onto aluminium profiles or flat bars dramatically increases their productivity, as heat is drawn away, reducing further risk of burnout.
Care should also be taken to ensure that your strips are protected against any other factors, such as moisture build up or direct water contact, as the PCB can erode if not placed under the right conditions. Consider various IP ratings and don't leave any exposed copper - always seal where possible.
If you do decide to pick up a suitable battery or regulator, please take care when shopping, as product quality varies and getting something as cheaply as possible may cause further incident. Research the product you are buying and consult with a professional installer for additional advise.
Take care out there.