A typical installation with one battery box.

The Right Model For You

TABLE OF CONTENTS
Power Formula 1
Power Formula 2
General Model Specifications
Time Needed to Recharge

If you plan to use your system as an "off peak" Energy storage system your best choice is the BPS 2000-25 with three extra battery boxes.

This will allow you to power more appliances in your home during the "peak" and save the most money on your Electric bill.

Technically minded people can use the two formulas below. However even for the technically minded it may be easier to just call us for a quick answer.

Power Formula 1 will help you determine which model is best for you. Power Formula 2 will tell you how long Mr. Electricity® will power things like your furnace and necessary devices.

It is important to understand that many of the devices you will be using only operate for seconds or minutes at a time. Also, you can easily switch certain devices on or off to conserve your battery power during an extended power outage. When using Mr. Electricity as an "off peak" Energy storage system you can ignore all the tips to save Energy except during a power outage. 

For example:

• Certain heat zones can be turned off altogether.
• Well pumps operate in short, periodic bursts.
• Your refrigerator can be switched off for many hours at a time. A fully stocked freezer can go without power for a couple of days.

Note: Your refrigerator is a constant load. Most modern units are self defrosting meaning they turn a heater on inside the freezer compartment to avoid ice build-up. This is a huge waste of Mr. Electricity® 's power. One of our customers uses a timer to cycle their refrigerator on for two hours and off for six which works well. Again this is not applicable in the day to day "off peak" Energy storage mode. But it's a nice tip to remember in an extended power outage.

Please read the instructions and if you have any questions, contact us.

Power Formula 1: Determine Your Model in Three Steps

Find anything in this chart that you will likely be using at any one time.

If you are using a device not listed here, simply read it's amp rating and multiply that number by 115 to determine  wattage use per hour.

Example: A typical garage door opener rated at 8 amps; 8 X 115 = 920 watts to make it work. However the door opener is not a constant load.  It takes less than 30 seconds at the 920 watts per hour rate to open or close the door.

This means it will only take about 7.5 watts from the batteries to open the door  and another 7.5 watts to close the door.

With each battery box storing 2,500 watts of Energy this is actually a very small drain as far as the batteries are concerned.

The main thing to consider in this example is the size of the Mr. Electricity.

If you plan to power multiple motors and big appliance loads at the same time, this would be another reason for buying the BPS 2000-25 with it's 2,500 watts of constant output power and a huge 5,500 watt surge capability.

Combine the wattage of each item to find your total watts. _______

Use this graph to find your model.

Power Formula 2: Determine how long Mr. Electricity® will power your home

Operating time depends on the amount of battery banks you purchase with your Mr. Electricity® system. Every system comes standard with a single battery box. Think of the battery box as a gas tank in a car.

You first need to determine how many operating hours you will need from Mr. Electricity® for your specific situation. This depends on whatever devices are critical to your comfort and safety during a power outage i.e. a furnace, well pump, sump pump and some lights.

Take the total watts you will use at any one time, which you figured in Power Formula 1, and divide that number by 115 to find your total AC amps.

Total watts   ÷   115  =  _____ AC amps

Multiply the AC amps by 10 to find your total battery amps.

_____ AC amps   x   10   =   _____ Battery amps

Multiply the battery amps by the number of hours you want you system to run (figured in step A of this formula) before needing to be recharged. This will tell you how many amp/hours you need.

_____ Battery amps   x   _____ Operating hours   =   _____ Total amp/hours

Obviously your system should be ordered with more amp/hours than the total amp/hours you figured in step D. Your specific needs will determine if you need to order additional battery banks.

Every Mr. Electricity® system comes standard with a 220 amp/hour battery bank. One extra bank would give you a total of 440 amp/hours. Two extra banks would give you 660 amp/hours and so on.

Another way  to consider it is each battery box is 2,500 watts of stored Energy. This means if you ran a 100 watt light bulb for 25 hours you would deplete one battery box. 

General Model Specifications

*Surge power rated for up to 15 seconds.
**Each battery box is sized to hold two golf cart type deep cycle batteries.

Note: Mr. Electricity® can charge either lead acid wet cell or maintenance free dry cell batteries.

Time Needed for Mr. Electricity® to Recharge:

Please note that our bigger units also have a bigger battery charger. This means less time is needed to recharge the batteries.