Solar Site Assessment

In the process of selection, design and installation of an appropriate solar PV system for your home or business, a professional site assessment is a crucial part.Cost and power output of your potential PV System significantly depend on it. The output of a PV module is directly proportional to the amount of sunlight strikes on it.
A proper site assessment significantly contributes to determine and identify a number of factors: the site capacity of generating energy, shading issues, how much revenue will be generated from the power plant, return on investment (ROI), rebates and incentives, structural and electrical concerns. The site assessment also significantly contributes to save money in basic energy efficiency improvements and more lucrative methods to organize a solar project on-site. After reviewing the report, you will be able to make well-versed decisions about your project. The site assessment report will help you to bring your goals, budget and energy needs together with the…

How to design a solar pv system

In order to design a solar pv system, you need to follow following steps:

1. Determine the amount of electricity (kWh) consumption and the electricity rate
It is important to determine the amount of electricity consumption per year for better understanding the economics of installing a solar system. On your utility bill, your electricity usage is summarized wherein natural gas usage should be excluded. As the path of the sun varies with the seasons, a solar PV system would offset your electricity demands mostly in the summer months. It should be also considered that most utility companies have a tier rate structure based on consumption patterns and state mandates. A small PV system significantly helps to reduce your electricity demands for moving you to a different tier, minimize your rates and saves your money.

2. Determine your available roof space (sq-ft)
Knowing your available roof space is crucialfor determining the quantity ofsolar panels you can actually use. Based on the size of y…

How to troubleshoot a solar photovoltaic (PV) system

We expect smooth power generation from a solar photovoltaic (PV) system while sun shining. When the sun is out but the system doesn't generate electricity as per required capacity, then we consider the system as problematic. Solar photovoltaic (PV) system occasionally requires troubleshooting as like as other energy systems. The key to your success depends on the strategy you choose for identifying the trouble source. Typically, three problems occur in solar photovoltaic (PV) system. They are-an array problem, inverter problem, or load problem. Concentrating on common troubleshooting problems and solutions can ensure that your system is taking the advantage of summer's sunny days.

Components of a solar photovoltaic (PV) system

Cell, module and array: A typical photovoltaic (PV) cell produces a small electrical output ranges from 0.5W to 2W approximately. As these devices are electrical, we can boost overall output level by wiring them in series and parallel strings. Wiring PV ce…

How to maintain solar panels

Solar panels play a significant role for generating electricity. Solar panels generate electricity when exposed to the sunlight. The efficiency of solar panels and generating electricity is strongly influenced when sun exposure to the solar cellis reduced. Dust, dry areas and building up other particles like droppings of birds have significant impact on the amount of generating electricity by solar panels. Cleaning solar panels regularly can significantly increase the overall efficiency of solar panels. Typically, solar panels are self-cleaning. Insufficient care for solar panels can decrease the efficiency of solar panels. Therefore, it is very important to maintain solar panels very carefully.

How to clean solar panel glass Before starting cleaning, you have to shut down your entire system as per instructions or guidelines of your manual provided by your solar panels manufacturer.Cleaning solar panels from the ground is safe. In order to stay on the ground saf…

Inverter for solar panels

Inverter is a power converter which converts Direct Current (DC) into Alternating Current (AC). As most of modern appliances operate on 120 volts AC, an inverter plays a key role for your solar power system. It can convert the low voltage DC to the 120 volts AC and also can charge the batteries if connected to the utility grid.

Basically, an inverter can supply three types of power. They are as follows:

Usual or typical power: An inverter has to supply usual or typical power on a steady basis which is continuous rating. It is comparatively lower than the surge power. For example, after the first few seconds, a refrigerator pulls this power to start up the motor.

Surge or peak power: Supplying maximum power by an inverter for short time period is called surge or peak power. Typically, it ranges from few seconds up to 15 minutes or so. For example, we can say about electric motors like pumps which require higher startup surge while running.

Average power: This power is comparatively lower…

How to size wire for solar panels

It is very important to size wires correctly for reaching energy from your solar panels to battery bank without any serious power loss. For example, we can say about flowing water through a pipe, if the size of the pipe is smaller, then very little amount of water can pass through it. Following steps are necessary for sizing wire for solar panels:

First Step: First of all, you have to decide the required voltage for your system. Typically, it is 12, 24 and 48 volts. Solar panels need the required size of wire which can last long. The simple equation is that if the voltage is higher, then solar panels need the smaller size of wire in order to carry the current smoothly and safely. In the power equation (P=V x I) of a circuit, it has been observed that the Power (Wattage) "P" is equal to the Voltage "V" times the current I. Therefore, it is realized that if the voltage increases the current decreases, because V x I always equal to P. If, the total amount of current is…

Solar Charge Controller

Solar charge controller is a device which regulates voltage and/or current to protect batteries from overcharging in the solar photovoltaic system. It has been observed that most solar panels of 12 volts have output voltage of 16 to 20 volts approximately. So, if there is no regulation the batteries will be damaged due to overcharging. In order to get fully charged, most batteries require around 14 to 14.5 volts. A solar charge controller regulates the rate of adding and subtracting of electric current from batteries. It helps to prevent batteries from overcharging and deep discharging. It is also protective against over voltage. This feature of solar charge controller contributes to enhance the lifespan of batteries significantly.

Types of Solar Charge Controller

Various shapes, sizes, features, and price ranges of solar charge controllers are available in the market. They are within the range of 4 amps to up to the 60 to 80 amp MPPT programmable controllers having computer interface.…

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