Power Consumption

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.

On/Off Switch to On

•

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

Operation

Power On and Off

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Installation

Power Consumption

•

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	115 watts x 3 hours	300 watts x 15 minutes
= 100 watt-hours	= 345 watt-hours	= 75 watt-hours

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

On/Off Switch to Off


10		Nothing Comes Close to a Cobra® 11

CPI 875 specifications

The Cobra Electronics CPI 875 is a distinguished power inverter designed to convert DC power to AC power, making it an invaluable tool for both recreational and emergency use. This compact inverter delivers 875 watts of continuous power and is capable of handling peak loads of up to 1750 watts. This attribute makes it suitable for powering essential devices such as laptops, smartphones, small appliances, and even small tools.

One of the remarkable features of the CPI 875 is its user-friendly design. The inverter is equipped with an easy-to-read LED display that provides vital information about battery voltage and output wattage. This helps users monitor power consumption in real-time, ensuring that devices do not exceed the inverter’s capabilities. Additionally, the CPI 875 comes with built-in protections against overloads, overheating, and short circuits, providing peace of mind during operation.

The inverter uses advanced technology to ensure efficient power conversion. Its modified sine wave output is effective for running most electronics and appliances, though it is crucial for users to verify compatibility with sensitive devices. The compact size and lightweight design of the CPI 875 mean it can be easily transported in vehicles or stored conveniently at home.

Another key characteristic is its versatility. The CPI 875 features dual AC outlets, enabling users to power multiple devices simultaneously. Moreover, it includes a built-in USB port for charging smartphones and tablets directly, enhancing its functionality in today’s tech-driven world.

The CPI 875 operates quietly and has a reputation for reliability, making it an ideal power solution for camping trips, RV use, or as a backup power source during outages. Its durable and rugged construction ensures that it can withstand the rigors of outdoor environments, making it a favored choice among outdoor enthusiasts.

In conclusion, the Cobra Electronics CPI 875 power inverter stands out due to its impressive power output, advanced safety features, user-friendly design, and versatility. Whether you’re on the road, enjoying the great outdoors, or preparing for unforeseen power outages, the CPI 875 is a reliable and efficient choice for all your power needs.