Power Consumption

On/Off Switch to Off

On/Off Switch to On

Operation

1. On the left side panel, switch the On/Off Switch to off.

NOTE The On/Off Switch turns the control circuit in the inverter on and off. It does not disconnect power from the inverter.

NOTE When the switch is in the off position, the inverter draws no current from the battery. When it’s in the on position, but no power is being supplied to the load, the inverter draws less than 500 milliamperes from the battery. This is low current draw. It would take more than a week to discharge a 100 ampere-hour battery at this rate depending on the age of the battery.

To turn the power inverter off:

2. On the left side panel, switch the On/Off Switch to on.

The inverter is now ready to deliver AC power to your loads. If several loads are to be operated by the inverter, turn them on separately, after the inverter has been turned on. This will ensure that the inverter does not have to deliver the starting currents required for all the loads at once.

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Be sure to have your power inverter properly installed before attempting to turn the unit on (see installation page 5).

To turn the power inverter on:

1. If a DC power supply is being used as the power source, switch it on.

Turning Your Inverter On or Off

Power On and Off

Installation

Power Consumption

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For each piece of equipment you will be operating from the inverter, you must determine the battery’s reserve capacity (how long the battery can deliver a specific amount of current – in automotive batteries, usually 25 amperes) or ampere-hour capacity (a measure of how many amperes a battery can deliver for a specified length of time).

Example – Reserve capacity: a battery with a reserve capacity of 180 minutes can deliver 25 amperes for 180 minutes before it is completely discharged.

Example – Ampere-hour capacity: a battery with an ampere-hour capacity of 100 ampere-hours can deliver 5 amperes for 20 hours before it is completely discharged.

To determine the battery ampere-hour capacity you require:

1.Determine how many watts each piece of equipment consumes. This can normally be found on the product label. If only the current draw is given, multiply the current draw by 115 to get the watt consumption.

2.Estimate the time (in hours) that each piece of equipment will be running between battery charging cycles.

3.Calculate the total watt-hours of energy consumption (power x operating time) using the average power consumption and the total estimated running time (in hours). Power x Operating Time = Watt-Hours.

Laptop

TV/VCR (up to 25")

Blender

50 watts x 2 hours = 100 watt-hours

115 watts x 3 hours = 345 watt-hours

300 watts x 15 minutes = 75 watt-hours

4.Divide the watt-hours by 10 to determine how many power supply’s (12 volt) ampere-hours will be consumed.


10 English		Nothing comes close to a Cobra® 11

CPI 850 specifications

The Cobra Electronics CPI 850 is a versatile and reliable power inverter designed to meet the power needs of outdoor enthusiasts, emergency preparedness, and everyday use. As one of the leading products in Cobra's lineup, it offers a perfect blend of performance and user-friendly features, making it an ideal choice for anyone looking to convert DC power from a car’s battery or a solar setup into usable AC power.

One of the standout features of the CPI 850 is its 850 watt continuous power output, which allows users to power a range of devices such as laptops, small appliances, and other electronics efficiently. With a peak surge power of up to 1700 watts, it can accommodate devices that require a higher energy spike at startup, ensuring that users have the flexibility to power both sensitive electronics and robust appliances.

The inverter employs advanced technologies, including a built-in cooling fan that prevents overheating during extended use, a critical feature for maximizing longevity and performance. It also includes multiple output options with two standard AC outlets and two USB ports, making it easier than ever to charge or power multiple devices simultaneously. The USB ports are especially convenient for charging smaller electronics like smartphones and tablets on the go.

The CPI 850 is designed with safety in mind, featuring built-in protection mechanisms such as overload, short circuit, and over-temperature protection, which safeguard both the inverter and connected devices from damage. Additionally, the inverter has an LED power indicator that allows users to monitor operational status easily.

Portability is another highlight of the Cobra CPI 850. It is compact and lightweight, allowing users to easily transport it in their vehicle or carry it along on outdoor adventures. This makes it an excellent companion for camping trips, tailgating, and even as a backup power supply during power outages.

In terms of construction, the CPI 850 is built to withstand rugged conditions. Its durable design ensures resilience against various environmental factors, making it suitable for both recreational and emergency applications.

Overall, the Cobra Electronics CPI 850 power inverter stands out through its blend of power, versatility, and safety features, making it an essential tool for anyone in need of portable power solutions. Whether you are looking to power essential devices on the road or in the great outdoors, the CPI 850 is equipped to meet your needs effectively.