HOW TO DETECT A HIDDEN CAMERA IN A ROOM

This info is important for those installers who travel a lot just to meet the needs of their clients;

When you stay in a hotel,how do you know there is no room pinhole camera?
When you travel to an unfamiliar destination or take a business trip,you stay at a hotel,but what you do not know is that you could unknowingly be photographed or be secretly recorded.

In this age of smart recording devices and pinhole sized drones,always remember when staying in a hotel, that you can use thi method to check your room:

1. When you have entered in to the room,turn off the lights,and lose the curtains,open your phone camera,do not turn the flash light on

2.Turn around the room with your cell phone,when a red dot is found,that means that a hidden web camera is installed.
If no red dots,then the room is okay

I hope this information is useful especially for those engineers,installers,sales people etc that travels frequently

DEHOSA global ventures 

How many solar panels will i need?


Determining how many solar panels you’ll need for your home means first knowing what your goals are. Do you want to minimize your carbon footprint?  Maximize your return on investment? Save as much money as possible?  Most people want to save as much money as possible while minimizing their impact on the environment.
To calculate how many solar panels you need, you first must determine how much energy your household uses; your roof’s usable surface area; the climate and peak sunlight in your area; the wattage and relative efficiency of the photovoltaic (PV) technology of your panels; and whether net metering is available.




To answer those questions, you’ll likely want to consult a professional solar installer.
Here is a sample set of questions that a solar professional might use to calculate the number of solar panels needed for your house:
1. What are the household’s energy requirements?

Take out past electricity bills and look for average usage. You want daily usage, so if your bill doesn’t show a daily average, just divide the monthly or annual average by 30 or 365 days, respectively, to determine your daily average electricity usage. Your answer will be in kilowatt-hours (kWh). (And just in case you are wondering, a kilowatt-hour is how much power you are using at any given time multiplied by the total time the power is being used.  If you run a 60w bulb all day, you’re using 1,440 watt-hours or 1.4kWh)

​2. What is the target daily average?

Solar panels don’t operate at maximum efficiency at all times. Weather conditions, for example, can temporarily reduce your system’s efficiency. Hardware issues can also cause the system to produce less energy than expected. Experts recommend adding a 25 percent “cushion” to your target daily average to offset such inefficiencies.

​3. How many hours of sunlight can you expect in your area?

The peak sunlight hours for your particular location will have a direct impact on the energy you can expect your solar system to produce. For example, if you live in Kaduna you can expect to have a greater number of peak sunlight hours than if you lived in Ogun. That doesn’t mean an Ogun homeowner wouldn’t enjoy significant solar energy production; it just means the homeowner would need more panels. 

Divide your daily kWh requirement by the number of daily peak sunlight hours. This gives you the amount of energy your panels need to produce every hour in kilowatt-hours. Multiply this number by 1,000 to convert your hourly power generation need to watts.

​4. How many panels would provide my target hourly wattage?

Here’s where panel quality makes a difference. There’s tremendous variation in solar panel capabilities and performance. PV solar panels (most commonly used in residential installations) come in wattages ranging from about 100 watts to 300 watts per panel, depending on the panel size and the cell technology used to manufacture the modules. Divide your home’s hourly energy requirement by the solar panels’ wattage to calculate the total number of panels you need. Do this for a high-wattage panel option and a lower-wattage option to establish a range that will set your expectations realistically.

This will give you the ideal number of panels for your electricity generation needs. Next, a professional installer needs to assess your roof architecture, angle to the sun and other factors to see if and how you’d be able to physically arrange that number of panels on your roof to achieve your daily energy production goals.
If you're ready get started, check out our solar calculator, which can help you figure out how much you might save going solar.

solar calculator: next page 

Basic knowledge that will increase your inverter battery life span

12V-200AH SMF BATTERY

LIFESPAN

The lifespan of an inverter battery depends on its usage and maintenance. However, most manufacturers give between one to two years warranty on batteries.

COST

The capacity of the battery, type and brand determines its price but generally a 200amp inverter battery sells for between N98,000 and N120, 000, 150amp for between N65, 000 and N80, 000, while 100amp sells for between N45, 000 and N50, 000.

COMMON MISTAKES THAT KILL INVERTER BATTERIES

There are two types of inverter batteries that are commonly used; wet-cell and dry-cell. One of the mistakes people make that easily damage an inverter battery is allowing power stored in it to drain completely before re-charging it. This kills the battery’s cells faster. 

The other mistake is not keeping batteries in properly ventilated areas. It is important to always use a well ventilated area for inverter installation. The inverter battery gets heated up during charging and operation. An airy place reduces the heating up of the battery.

It also reduces the frequent water topping requirement.

For the wet-cell batteries, not checking the water level of batteries also damages them quicker. It is recommended that you check the water level of your battery every two months. Ensure that the water level is maintained between the maximum and minimum water limit. Always top up the battery with distilled water. Do not use tap water or rain water as it contains excess minerals and impurities which affect the life and performance of the battery.

Allowing battery terminal to get rust and corroded kills it faster. Always keep the battery terminals corrosion and rust free by cleaning it.

INVERTER BATTERY SIZE CALCULATION

Generally, the size of the battery is determined by the wattage load and the projected runtime. 
Using a battery that is not strong enough can cause the inverter not to power up and may lead to discharging issues that could permanently damage the battery.  

The formula mentioned below can be used to calculate the battery size:
Battery size = Inverter rating in watts ÷ input voltage x usage time (hrs). e.g. 300W ÷ 12V x 5 hours = 125 Amp


DEHOSA global ventures