For a long time I was a 12-volt man aboard our trawler, Patricia Ann. Twelve volt DC systems were always easy, safe, and were able to serve their purpose. But after a five-day cruise on our boat in which we had to continuously power the generator in order to supply power to the 115-volt AC freezer to preserve temperatures and temperatures, I began thinking about different options. We spent more than ninety-eight hours on the genset within just five days. It's time to get yet another oil service! So I started to contemplate the possibility of adding an inverter to the freezer. What is an inverter? An inverter can be described as an electrical device that converts mua biến tần battery direct current (dc) power into alternating current (ac). There are a lot of choices available which one to choose from. Where do I begin? When it comes to choosing an inverter that can power your boat, the options can be confusing. With so many options on the market, it is important to know what the distinctions are so that you make the best selection for your specific boat's needs. Your main concern will be wattage. Inverters are sized based on the wattage they can handle. Think about what items you'll be running, as well as the amps each item requires. You will need to also consider how many of items you'll be running at the same time to determine which inverter is the most suitable for your needs. It is not advisable to overload your inverter by putting on a lot of powerful items at the same time. You'll probably notice that the cost of inverters will increase depending on the amount of wattage. You can find the wattage from the manufacturer's sticker on the appliance. If just the amps are indicated, apply the formula (amps x 120 Volts= wattage) to convert to Watts. The next issue is the need to buy an authentic sine wave inverter or an inverter that is modified. A true sine inverter is one that delivers the same kind of current that you receive from the power company. A modified sine inverter is at times less pure. This modified inverter was created as a more economical choice to the true sine inverter. You'll find that although the true sine inverter provides the highest electrical flow, it also will be the most expensive. A modified 1800 watt sine inverter is about $350.00. Although the modified sine inverter is more cost-effective, it comes with its individual problems. For a good number of smaller devices, like hair dryers or refrigerators an inverter modified by sine is going to be adequate. However, with some gadgets like plasma TVs, you may become aware of a lack of precision. In this case a true sine inverter may be an option that will ensure that you can have higher quality output. It is essential to bear in mind that an inverter that is modified can't be upgraded into a true sine inverter. You should ensure that you purchase the correct inverter for your boat's requirements at the beginning. It is best to ask about overload shut-off switches or indicators on your inverter to ensure that you are protected in the event you are overloading the inverter. Inverters often have these switches with them as standard. It's also worth it to verify if the inverter features thermal and short circuit shut down in order to stop these types of emergencies and other emergencies. Furthermore, some inverters have built-in shut down functions in the event that the battery's storage levels get to a particular low point. I decided to install the Xantrex 1800 modified sine inverter that can handle a power output of 1000 watts continuous load. This inverter has a built-in transfer switch which transfers power between the shore power and the inverter power. The last concern to consider is your battery on the vessel you are likely to draw your power from. Your inverter will draw power from this battery bank and you must be able to figure out how long your inverter will function before a recharge must take place. Check your battery and determine the amp-hours they have for them. Amp-hours correspond to amps, time hours. A battery bank consisting of 2 8D batteries would have about 580 amp hours. So I know that my freezer pulls 2 amps and operates for 20 mins every hour which is roughly 7 hours per 24 hours. The total amp-hours that the freezer can use in day are 14. Therefore, we could run the inverter for around 41 days without recharge, but do we really need to? It's not wise to charge a battery all the way all the way to zero. The battery's life is directly connected to how deep the battery's cycle takes place each time. If a boat battery is discharged to 50% every day, it will endure approximately twice as long if it is cycled to 80percent of discharge every day. If it is cycled at a rate of 10% of discharge, it'll last around 5 times the amount of time one cycled at fifty percent. However, this doesn't mean you cannot go up to 80% sometimes. But you'll require a basic understanding of the loads. You need to plan on an average discharge of about 50% to ensure the best capacity vs. price. In addition, there is an upper limit to the discharge - the battery that is continuously cycled at 5% or less is likely to not last as long as one cycled down 10%. This is because during particularly short cycles, lead dioxide is likely to form on the plates that are positive. I like to cycle my batteries at a rate of 20% before recharging. Monitoring your battery is possible, however I prefer a Trimetric 2025 monitoring tool. This electronic gadget permits me to keep track of the batteries and the hours used precisely. If you plan it well Inverters can make a boat trip more enjoyable. Once you've selected the correct inverter for your boat, make sure it's properly installed. If you're unsure about working with electricity it is best to have a specialist do the work for you. You can then be on your with confidence knowing you have what you need to keep your boat running at a sufficient level of power. We took another four-day trip over the New Year holiday with our new inverter. I'm happy to say that we only used the generator just 6 hours over 4 days. The life is good.