1.How much total watts of your appliances

2.How big size is your battery bank

3.How much energy of the solar panels can be generated to your battery bank

First you need to list out all the appliances that you wish to use over a period of time or no. hours per day.

For Example: Use 40w fluorescent lights for 4 hours, 40w x 4 hrs = 160WH from the battery.

You may repeat the calculation for all your other appliances, then add the total consumption and you will know how big size of your battery bank needed.

**To know more about appliances in wattage, you can check the Appliance -Wattage listings here**

To find out the approximate amperage of electrical devices, you can use the Ohms Law formula:

Amps= Watts divided by Volts.

For example: A 1,800watt appliance at 240v would be 7.5 amps

To calculate your daily power usage, you can eventually based on your last 12 monthly electrical bills and calculate your average kilowatt hour (kWh) usage per month.

For examples : Monthly electrical bill consumption 1000kWh :

1000 kWh divided 30days = 33.33kWh per day

To do this, get your last 12 monthly power bills and calculate your average kilowatt hour (kWh) usage per month. The reason we use 12 is because our power consumption fluctuates with the seasons. But if you do not have all your power bills, then simply use last month’s one.

Then divide your monthly usage by 30 (the average number of days in a month, to get your daily power used.

– So for example: If you have a monthly power consumption of 800 kWh, then your daily amount is 800/30= 26.7 kWh per day.

– Now if you want to only halve your power bill then you need to produce 26.7 / 2 = 13.4 kWh of solar panel watt power per day.

To do this, you first need to determine how many usable hours of sunlight your area receives per day. This is where a solar insolation map comes in handy – you can view one from our original article on our website.

Once you know your daily sunlight hours, go back to your daily kilowatt hours needed and divide it by the daily sunlight hours, then multiply it by a factor of 1.25 (takes into account energy losses from the solar panel watt wiring, battery , and inverter)

– Continuing from our example 1 – Calculate Daily Power Used:

To do this, get your last 12 monthly power bills and calculate your average kilowatt hour (kWh) usage per month. The reason we use 12 is because our power consumption fluctuates with the seasons. But if you do not have all your power bills, then simply use last month’s one.

Then divide your monthly usage by 30 (the average number of days in a month, to get your daily power used.

– So for example: If you have a monthly power consumption of 800 kWh, then your daily amount is 800/30= 26.7 kWh per day.

– Now if you want to only halve your power bill then you need to produce 26.7 / 2 = 13.4 kWh of solar panel watt power per day.

Our solar panel watt needs equal:

13.4 kWh / 5.5hrs x 1.25 = 3.045 kW or 3045 Watts per day.

This means we need solar panels with the capacity to produce at least 3045 Watts of power.

This step will help you work out the cost of the solar panels needed to make 3045 Watts of power. At the moment the highest average cost for solar panels in the US is $4.85 per Watt.

– In our example: It will cost us at the most 3045 x 4.85 = $14,768 to install solar panels to halve our power bill. And that’s before wiring, charge controllers, batteries, inverters, and electrician costs.

1.What is your budget costs ?

2.How much power (watts) do you need ?

3.Panel Sizes & locations

4.Accessories / mounting needed

There are so many types & quality of solar panel in the market – rigid panel vs flexible thin film or folding panels, mono vs poly crystalline type & etc. The higher watts in panel, the more costly it will be.

Your solar panel needs to be sizes according to how much power that you are using and not according to the size of battery that you are charging. Please calculate and list out the total watts you need before decide how many power size of your panels.

Before decided to purchase the panels, it is important to have the actual measurements of your roof sizes by determining where will be the right areas to place your panels. Each solar manufacturers produce various dimensions although with the same watts panel.

Before deciding to purchase panels from manufacturers, you should measures and determine which location of your roof will be the right areas to place the panels. Here you need to make sure the overall size you need. Each manufacturers provide different sizes although they supply the same watts power panels. Get the specifications of sizes from the manufacturers before confirm the panels.

After you confirm in your power sizes of panels, you need to consider of type of accessories that need to be add on for your final installation and wiring works. Accessories such as cables, junction box, blocking diodes,12v cigarette lighter socket, flexible or rollable mounting system, mounting brackets , connectors etc.

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Solar Energy generally is the energy from the sun. It can be found and stored when the is a sun out there. Solar Panel also known as Photovoltaic (PV) modules able to converts free sunlight into direct current (DC) electricity thru numerous solar cells as the semiconductor media. Solar panels generally can be seen in our daily life like calculators, satellites, or even space ships etc. PV technology generates electrical energy from sunlight. It produces totally free of air pollution or hazardous waste such as liquid or gaseous fuel to generate the energy. Solar Energy technology is free , clean and highly reliable energy and require little maintenance.

**PV Modules (Solar Panel)** – convert sunlight into DC electric to be generated into the Battery Bank

**Solar Charge Controller** – prevents battery over charging and prolongs the battery life of your PV system. It can generate

the same voltage system between panels and battery

**Deep Cycle Battery** – stores energy when there is an excess coming in and distribute it back out when

there is a demand. Solar PV panels continues to re-charge batteries each day

to maintain battery charge.

**Inverter** – converts DC power into standard AC power for use in the home, synchronizing with

utility power whenever the electrical grid is distributing electricity.

No more worry on the high electrical bills need to be paid, because the solar system can solves out your problem of too depending on the electrical utility but providing a more safe, mobility and green energy life. In order to be fully independent or so called Stand-alone system , a solar system must equips few main components, such as solar panels or array, solar charge controller, battery storage bank and inverter.

Stand-alone PV systems are designed to operate independent of the electric utility grid, and it typically designed and sized to supply our home DC and/or AC electrical loads. Stand-alone systems generally can be powered by a PV array ,wind power, an engine-generator or utility power as a backup energy source in what is called a PV-hybrid system. The simplest type of stand-alone PV system is a direct-coupled system, where the DC output of a PV module or array is directly connected to a DC load.

**Say “ Goodbye “ to your Electric Utility Bills**