Charge controller/ charge regulator: Basically it limits the rate of electric current which is added to or drawn from rechargeable
electric batteries. It
prevents overcharging and may protect against over voltage, as
over voltage instances can reduce the battery performance/ lifespan, and may
pose a safety risk. It also prevents completely draining ("deep
discharging") a battery, performs controlled discharges, depending on the
battery technology, to protect its life.
The terms "charge controller" or "charge regulator"
may refer to either a stand-alone device, or to control circuitry integrated
within a battery pack, battery-powered device, or battery charger.
In solar applications:
A charge controller is basically a voltage and/or current regulator to
keep batteries from overcharging. It regulates the voltage and current coming
from the solar panels going to the battery.
Most of the 12 volt panels outputs 16 to 20 volts, so
if there is no regulation the batteries will be damaged from overcharging. Most
of the 12V batteries need around 14 to 14.5 volts to get fully charged.
The deep-cycle batteries used in renewable energy systems are
designed to be discharged by about 80 percent. If they are discharged 100
percent, they are immediately damaged.
The only way to
prevent over discharge when all else fails, is to disconnect loads (appliances,
lights, etc.), and then to reconnect them only when the voltage has recovered
due to some other means of substantial charging. When over discharge is
approaching, a 12 volt battery drops below 11 volts (a 24 V battery drops below
22 V). A low voltage disconnect circuit will disconnect loads at that set
point. It will reconnect the loads only when the battery voltage has
substantially recovered due to the accumulation of some charge. A typical LVD
reset point is 13 volts (26 V on a 24 V system).
Charge controller
connections
Charge
controller types:
Simple 1 or 2
stage controls which rely on relays
or shunt transistors to control the voltage in one or two steps. These
essentially just short or disconnect the solar panel when a certain voltage is
reached. These are the most basic models. The reliability is very high as they
use very few components and chance of failure is very less.
2 or
3 stage and/ or PWM based controller: Quite a few charge controls have
a "PWM" mode. PWM stands for Pulse Width Modulation. PWM is often
used as one method of float charging. Instead of a steady output from the
controller, it sends out a series of short charging pulses to the battery - a
very rapid "on-off" switch. The controller constantly checks the
state of the battery to determine how fast to send pulses, and how long (wide)
the pulses will be. In a fully charged battery with no load, it may just
"tick" every few seconds and send a short pulse to the battery. In a
discharged battery, the pulses would be very long and almost continuous, or the
controller may go into "full on" mode. The controller checks the state
of charge on the battery between pulses and adjusts itself each time.
MPPT
charge controller: Controller embed with MPPT
technology calculates the maximum power voltage (V) at which the PV module
delivers maximum power, and then the MPPT operates the module at a level, which
extracts the maximum available power. The Solar Charger Controller continuously
recalculates the maximum power voltage according to the changing operating
conditions.
PWM VS
MPPT charge controller:
Pulse
width modulation (PWM)
and Maximum power point tracking (MPPT).
Both adjust charging rates depending on the battery's charge level to allow
charging closer to the battery’s maximum capacity as well as monitor battery
temperature to prevent overheating.
If
maximizing charging capacity were the only factor considered when specifying a
solar controller, everyone would use a MPPT controller. But the two
technologies are different, each with it’s own advantages. The decision depends
on site conditions, system components, size of array and load, and finally the
cost for a particular solar power system.
Factors
determining the selection of controllers:
Temperature
Conditions
An MPPT controller is better suited for colder conditions. As solar module operating temperatur
An MPPT controller is better suited for colder conditions. As solar module operating temperatur
goes down, the Vmp increases. That’s
because the voltage of the solar panels operating at their peak power point at
Standard Testing Conditions (STC is 25C°) is about 17V while the battery
voltage is about 13.5V. The MPPT controller is able to capture the excess
module voltage to charge the batteries. As a result, a MPPT controller in
cool conditions can produce up to 20 – 25% more charging than a PWM controller.
In comparison, a PWM controller is
unable to capture excess voltage because the pulse width modulation technology
charges at the same voltage as the battery.
However, when solar panels are
deployed in warm or hot climates, their Vmp decreases, and the peak power point
operates at a voltage that is closer to the voltage of a 12V battery. There is
no excess voltage to be transferred to the battery making the MPPT controller
unnecessary and negating the advantage of an MPPT over a PWM.
Array
to Load Ratio
In a scenario where the solar array is large relative to the power draw from the batteries by the load, the batteries will stay close to a full state of charge. A PWM controller is capable of efficiently maintaining the system without the added expense of an MPPT controller.
In a scenario where the solar array is large relative to the power draw from the batteries by the load, the batteries will stay close to a full state of charge. A PWM controller is capable of efficiently maintaining the system without the added expense of an MPPT controller.
Size of
the System
Low power systems are better suited to a PWM controller because:
Low power systems are better suited to a PWM controller because:
A PWM controller operates at a
relatively constant harvesting efficiency regardless of the size of the array
A PWM controller is less expensive
that a MPPT, so is a more economical choice for a small system
A MPPT controller is much less
efficient in low power applications. Systems 170W or higher will be
advantageous if MPPT controller is used.
Type of Solar Module
Stand-alone off-grid solar
modules are typically 36-cell modules and are compatible with both PWM and MPPT
technologies. Some grid-tie solar modules on the market today
are not the traditional 36-cells modules that are used for off-grid power
systems. For example, the voltage from a 60-cell 250W panel is too high for
12-Volt battery charging, and too low for 24-Volt battery charging. MPPT technology
tracks the maximum power point (thus MPPT) of these less expensive grid-tie
modules in order to charge the batteries, whereas PWM does not.
Cost
MPPT controllers are typically more expensive than PWM’s but are more efficient under certain conditions, so they can produce more power with the same number of solar modules than a PWM controller. One must then analyze the site to verify that the MPPT can indeed perform more efficiently when used in that system’s given set of conditions.
MPPT controllers are typically more expensive than PWM’s but are more efficient under certain conditions, so they can produce more power with the same number of solar modules than a PWM controller. One must then analyze the site to verify that the MPPT can indeed perform more efficiently when used in that system’s given set of conditions.
When specifying one technology over
the other, the cost of the controller becomes less important than the total
cost of the system. To specify a controller technology simply based of cost, be
sure to perform a close analysis of realized efficiencies, system operation, load
and site conditions.
SUMMARY OF COMPARISON:
PWM Charge Controller
|
MPPT Charge Controller
| |
Array Voltage
|
PV array & battery voltages should match
|
PV array voltage can be higher than battery voltage
|
Battery Voltage
|
Operates at battery voltage so it performs well in warm temperatures and when the battery is almost full
|
Operates above battery voltage so it is can provide “boost” in cold temperatures and when the battery is low.
|
System Size
|
Typically recommended for use in smaller systems where MPPT benefits are minimal
|
≈ 150W – 200W or higher to take advantage of MPPT benefits
|
Off-Grid or Grid-Tie
|
Must use off-grid PV modules typically with Vmp ≈ 17 to 18 Volts for every 12V nominal battery voltage
|
Enables the use of lower cost/grid-tie PV Modules helping bring down the overall PV system cost
|
Array Sizing Method
|
PV array sized in Amps (based on current produced when PV array is operating at battery voltage)
|
PV array sized in Watts (based on the Controller Max. Charging Current x Battery Voltage)
|
Important functions of Charge controller:
Blocking Reverse Current:
Photovoltaic panels work by pumping current through your battery in one direction. At night, the panels may pass a bit of current in the reverse direction, causing a slight discharge from the battery. The potential loss is minor, but it is easy to prevent. In most controllers, charge current passes through a semiconductor (a transistor) which acts like a valve to control the current. It allows current to passé only in one direction. It prevents reverse current without any extra effort or cost.
Photovoltaic panels work by pumping current through your battery in one direction. At night, the panels may pass a bit of current in the reverse direction, causing a slight discharge from the battery. The potential loss is minor, but it is easy to prevent. In most controllers, charge current passes through a semiconductor (a transistor) which acts like a valve to control the current. It allows current to passé only in one direction. It prevents reverse current without any extra effort or cost.
Preventing
overcharge:
When a
battery reaches full charge, it will no longer store incoming energy. If energy
continues to be applied at the full rate, the battery voltage gets too high. There
is excessive loss of water, and a chance that the gasses can ignite and cause a
small explosion. The battery will also degrade rapidly and may possibly
overheat.
Preventing overcharge is done by reducing the flow of energy to the battery when the battery reaches a specific voltage (full rated voltage). When the battery voltage drops due to discharge or an increase in electrical load, the controller again allows the maximum possible charge to the battery. This is called "voltage regulating." It is the most essential function of all charge controllers. The controller "looks at" the voltage and in response regulates the battery charging.
Preventing overcharge is done by reducing the flow of energy to the battery when the battery reaches a specific voltage (full rated voltage). When the battery voltage drops due to discharge or an increase in electrical load, the controller again allows the maximum possible charge to the battery. This is called "voltage regulating." It is the most essential function of all charge controllers. The controller "looks at" the voltage and in response regulates the battery charging.
Control Set Points vs. Temperature:
The ideal set points for charge control vary with a battery's temperature. Some controllers have a feature called "temperature compensation." When the controller senses a low battery temperature, it will raise the set points. Otherwise when the battery is cold, it will reduce the charge too soon. If your batteries are exposed to temperature swings greater than about 30° F (17° C), compensation is essential.
Some controllers have a temperature sensor built in. Such a controller must be mounted in a place where the temperature is close to that of the batteries. Better controllers have a remote temperature probe, on a small cable. The probe should be attached directly to a battery in order to report its temperature to the controller.
An alternative to automatic temperature compensation is to manually adjust the set points (if possible) according to the seasons. It may be sufficient to do this only twice a year, in spring and fall.
The ideal set points for charge control vary with a battery's temperature. Some controllers have a feature called "temperature compensation." When the controller senses a low battery temperature, it will raise the set points. Otherwise when the battery is cold, it will reduce the charge too soon. If your batteries are exposed to temperature swings greater than about 30° F (17° C), compensation is essential.
Some controllers have a temperature sensor built in. Such a controller must be mounted in a place where the temperature is close to that of the batteries. Better controllers have a remote temperature probe, on a small cable. The probe should be attached directly to a battery in order to report its temperature to the controller.
An alternative to automatic temperature compensation is to manually adjust the set points (if possible) according to the seasons. It may be sufficient to do this only twice a year, in spring and fall.
Control Set Points vs. Battery Type:
The ideal set points for charge controlling depend on the design of the
battery. The vast majority of RE systems use deep-cycle lead-acid batteries of
either the flooded type or the sealed type. Flooded batteries are filled with
liquid. These are the standard, economical deep cycle batteries.
Sealed batteries use saturated pads between the plates. They are also called "valve-regulated" or "absorbed glass mat," or simply "maintenance-free." They need to be regulated to a slightly lower voltage than flooded batteries or they will dry out and be ruined. Some controllers have a means to select the type of battery. One should never use a controller that is not intended for your type of battery.
Sealed batteries use saturated pads between the plates. They are also called "valve-regulated" or "absorbed glass mat," or simply "maintenance-free." They need to be regulated to a slightly lower voltage than flooded batteries or they will dry out and be ruined. Some controllers have a means to select the type of battery. One should never use a controller that is not intended for your type of battery.
Eg: Typical
set points for 12 V lead-acid batteries at 77° F (25° C)
(These are typical, presented here only for example.)
High limit (flooded battery): 14.4 V
High limit (sealed battery): 14.0 V
Resume full charge: 13.0 V
Low voltage disconnect: 10.8 V
Reconnect: 12.5 V
Temperature compensation for 12V battery:
-.03 V per ° C deviation from standard 25° C
(These are typical, presented here only for example.)
High limit (flooded battery): 14.4 V
High limit (sealed battery): 14.0 V
Resume full charge: 13.0 V
Low voltage disconnect: 10.8 V
Reconnect: 12.5 V
Temperature compensation for 12V battery:
-.03 V per ° C deviation from standard 25° C
Overload Protection:
A circuit is overloaded when the current flowing in it is higher than its capacity. This can cause overheating and can even be a fire hazard. Overload can be caused by a fault (short circuit) in the wiring, or by a faulty load like a water pump. Some charge controllers have overload protection built in, usually with a push-button reset. Built-in overload protection can be useful, but most systems require additional protection in the form of fuses or circuit breakers.
Displays:
A circuit is overloaded when the current flowing in it is higher than its capacity. This can cause overheating and can even be a fire hazard. Overload can be caused by a fault (short circuit) in the wiring, or by a faulty load like a water pump. Some charge controllers have overload protection built in, usually with a push-button reset. Built-in overload protection can be useful, but most systems require additional protection in the form of fuses or circuit breakers.
Displays:
Charge
controllers include a variety of possible displays, ranging from a single led light
to digital displays of voltage and current. These indicators are important and
useful. A display system can indicate the flow of power into and out of the
system, the approximate state of charge of your battery, and when various
limits are reached.
Important
parameters:
Charge Current
rating (A): It is the rated charge current of the controller for which
the operation is meant.
Battery voltage
(V): It is the voltage of the battery for which the
controller is designed.
Maximum PV power
(KW): It is
the maximum power that the controller can operate perfectly.
Peak efficiency (%):
It is the
max. efficiency of the controller.
Self consumption:
It is the
current consumed by the controller in the process of its functioning.
Automatic load
disconnect: It is the protective feature includes the disconnection of
load in case of low voltage, over discharge (abnormal conditions).
PV open circuit
voltage: The
maximum voltage that the controller can withstand.
Absorption
voltage: It is the
range or point of voltage for which the charge of battery is normal.
Float voltage: It is the point
of voltage for a given battery rating, the charging process is float (Pulse
form).
Charge algorithm: Type (3/4 stage) of algorithm included in the
controller.
Peak current (A): Maximum current
that the controller can withstand.
Temperature
compensation (mV/oC): It is the drop of voltage per degree rise of
temperature.
Low voltage
disconnection (V): It is the set point voltage for which the load gets
disconnected.
Low voltage
reconnection (V): It is the set point voltage for which the load gets
reconnected.
Protection: Protection
against over voltage, deep discharge, short circuit faults.
Display and
metering: Displays
details like voltage level, charge percentage, discharge time etc. Also
indicators to indicate faulty conditions like overvoltage, under voltage, short
circuit faults.
Equalization: It attempts to equalize - or make all cells in
the battery or battery bank of exactly equal charge.
Essentially it is a period of overcharge, usually in the 15 to 15.5 volt range. If you have some cells in the string lower than others, it will bring them all up to full capacity. In flooded batteries, it also serves the important function of stirring up the liquid in the batteries by causing gas bubbles.
Technical data
sheet:
The
following links directs to the data sheet of charge controller
Manufacturers:
| Name of the company | Address |
| Sunmatrix Solar Power Systems | #50
| 40feet road( K.T.G College road) | 3rd Cross Madduramma Layout | Hegganahalli Cross | Bangalore 560 091 | INDIA. Ph: +91 9740900350 | email: devaraj@sunmatrixsolar.com |
| Greensol Renewable Power Private Limited | No.
28 A , 2nd Phase, Peenya Industrial Area Bengaluru - 560058 Karnataka, India |
| Alfa power solution | East krishna nagar, Delhi - 54, India, Mob: +91 9810271172, info@dspsinewaveinverterscardsindia.com |
| Systellar Innovations | Shankar Chowk,Delhi Road,Meerut - 250002,Uttar Pradesh, INDIA, Contact No: 0121-2400394,E-Mail:info@systellar.in |
| Kavita solar energy pvt. Ltd. | No. 231, New Defence Colony, Near Railway Station Railway Road, Muradnagar,Ghaziabad - 201206, Uttar Pradesh, India, Call Us: (+91)-8447556942, Mobile:+(91)-9837261007,+(91)-9012147484 |
| Alpha Impex (solar Division) | R264, TTC, MIDC, Rabale, Navi Mumbai 400701, Maharashtra. India |
| Protonics Systems India Private Limited | Anil
Bhushan (Director) C- 45, Sector- 81, Phase- 2 Noida - 201305, Uttar Pradesh, India |
| Easy Photovoltech Private Limited | No. 406, Vikasdeep Building, Lakshmi Nagar District Center, Laksmi Nagar,Delhi (India) - 110092,+(91) - 9311112551 |
| Haryana International | 206,
2nd Floor, Vardhman Fortune Mall, GT Karnal Road, Near Hans Cinema New Delhi - 110009, Delhi, India |
| Suntek Energy Systems Private Limited | Sy.No.
240/242, Ground Floor, Chinna Thokatta, New Bowenpally, Main Road, Secunderabad - 500011, Telangana, India. |
| Pulsar Electronics Private Limited | No.
127/128, Sonal Link Industrial Estate, No. 2, Link Road, Opposite Movie, Time
Cinema, Malad West Mumbai - 400064, Maharashtra, India |
| Rishabh Enterprises | 41,
A-13, First Floor, Car Market, Opposite Jhilmil Metro, Dilshad Garden Delhi- 110095, India |
| Leelavati Automation Pvt Ltd | D-11,
Block No. 4, Mira Mansion, Third Floor, Sion Circle, Sion West, Near Indra
Market Mumbai - 400022, Maharashtra, India |
| Mainframe Energy Solutions Pvt. Ltd. | 1E/5,
Ground Floor, Jhandewalan Extension New Delhi - 110055, Delhi, India |
| Kavita Solar Energy Pvt. Ltd., | Muradnagar, 231, New Defence Colony, Railway
Road Muradnagar - 201206, Uttar Pradesh, India |
| Ashish Verma | 303,
Pragati Deep Tower, District Center, Laxmi Nagar Delhi- 110092, India Call Us: (+91)-8588804251 |
| SIKCO Engineering Services Pvt. Ltd | B-97,
Sector-12, Kharghar, Near Shivaji Chowk, Durga Mandir Navi Mumbai - 410210, Maharashtra, India |
| Rockforest | No. 110, 4th Main, Akshayanagar, St Anns School Road, Begur Hobli, Bengaluru - 560068, Karnataka, India, Call Us: (+91)-8048413186, Mobile: +(91)-9986670254, +(91)-449038387 |
| Speedex Batteries | No.
4810, Gali Mitra, Roshanara Road New Delhi - 110007, Delhi, India |
| Green Field Solar Solution Pvt. Ltd | New
No. 29, First Main Road, Shenoy Nagar East Chennai - 600030, Tamil Nadu, India |
| Procorp Enertech Pvt. Ltd. | Shed
No. 109/4, Lane 17, Phase 2nd, IDA, Cherlapally, Rangareddy Hyderabad - 500051, Telangana, India |
| Signet | No.
201/202, Champaklal Industrial Estate, No. 105, Sion East Mumbai - 400022, Maharashtra, India |
| Eminent Devices & Technologies | No.
6/201, 2nd Floor, North Usman Road, T. Nagar Chennai - 600017, Tamil Nadu, India |
| Powermax Energies Pvt Ltd | 202,
Matoshree, Mithagar Road, Mulund East Mumbai - 421201, Maharashtra, India |
| Senratech | No.
502-A, Golden Complex, Avinashi Road Tiruppur - 641602, Tamil Nadu, India |
| Hi-tec Power Controls | No.
8, Ground Floor, Surya Complex, Near Swastik Cross Road, C. G. Road,
Navrangpura Ahmedabad - 380009, Gujarat, India |
| Computronix | No.
10, Electronic Plaza, No. 6, P. R. Lane, S. P. Road, 3rd Cross, Ground Floor
Bengaluru - 560002, Karnataka, India |
| Solar Powertech Solutions | TS- 33, SIDCO Industrial Estate, Kurichi, Coimbatore - 641021, Tamil Nadu, India, Call Us: (+91)-8377808381 |
| Prolux Technology | S.N.
75/2/2, Ashok Nagar, Nawale Wasti, Tathawade Pune - 411033, Maharashtra, India |
| Geie Solar Products India Pvt Ltd | 80G,
Rajendra Nagar Industrial Area, Sahibabad Ghaziabad - 201007, Uttar Pradesh, India |
| Shyama Packaging | No.
43, Suvarna Laghu Udyog Yojana, MIDC, Hingna Nagpur - 440016, Maharashtra, India |
| Airkom Agencies (i) Pvt Ltd | 111,
Amit Industrial Estate, Dr. S.S. Rao Road, Near Gandhi Hospital, Parel Mumbai - 400012, Maharashtra, India |
| Urja Unlimited | Plot-
783, Sector- 17 Faridabad - 121002, Haryana, India |
| Finetech Systems | No.
3/177, Devampalayam, Palangarai, Avinashi TK, Tiruppur District, NH 544,
Salem- Coimbatore Highway Tiruppur - 641654, Tamil Nadu, India |
| Diamond Engineering Enterprises | 122-D,
Kummalamman Koil Street, Tondiarpet, Near Tondiarpet Market Chennai - 600081, Tamil Nadu, India |
| Sangam Electronics Co. | No.
8, Parekh Wadi, Opposite Kasa Nagar, Near Bada Ganesh Mandir, Sumul Dairy
Road, Katargam G.I.D.C. Old Surat - 395004, Gujarat, India |
| Saffron Engineering | Plot
No. 1, Ashirwad Industrial Society - 2, Opposite Bharat Petrol Pump, 120 Feet
Bamroli Road Surat - 395017, Gujarat, India |
| Crystal Corporation, Akurdi | Jay
Ganesh Vision, BR 1, 315, B. Wing, Near Dalvinagar Rail Bridge, Akurdi Pune - 411035, Maharashtra, India |
| Monarck Electronik Industry | No. 2, Chapru Nagar Square, C. A. Road, Nagpur - 440008, Maharashtra, India |
| Sun Urja | No.
314 & 315, Krishna Mall, Sector-12, Dwarka New Delhi - 110075, Delhi,
India, moblie: +(91)-9650381148, +(91)-9871409881 |
| Key Operation & Electrocomponents Pvt. Ltd | Plot
No. 48, 1st Floor, Street No. 3, Rajasthan Udyog Nagar New Delhi - 110033, Delhi, India |
| Purevolt Products Private Limited | D-
9/6, Okhla Industrial Area, Phase- 1 New Delhi - 110020, Delhi, India |
| Ujak Solar Energy & Technology Private Limited | A-205,
Sheraton Classic, Dr. Charat Singh Colony, Off Andheri-Kurla Road, Near Old
Airtel Gallery, Chakala, Andheri East Mumbai - 400093, Maharashtra, India |
| Suryodaya Energies | H-2,
Textile Colony Industrial Area- A, Opposite OM Dyeing Ludhiana - 141008, Punjab, India |
| Adithya Solar Energy Systems | No.
209, 1st Floor, Meghana Complex, Opposite Andhra Bank, Balanagar Hyderabad - 500037, Telangana, India |
| SLM Energy Technologies Pvt. Ltd. | Plot No. 160, Scheme No. 4, Rajendra Nagar Alwar - 301001, Rajasthan, India, Mobile:+(91)9899525616 |
| Surat Exim Private Limited | No.
2030, Jash Textile Market, Ring Road Surat - 395002, Gujarat, India |
| Usha General Industrial Corporation | J-
2949, Narela Industrial Area Delhi - 110040, India |
| Decent Plastic Industries | A-
103, Flatted Factory Complex, Jhandewalan New Delhi - 110055, Delhi, India |
| Orient Traders | F- 55, Okhla Industrial Area, Phase- 1,Delhi- 110020, India |
| Zillion Enterprises | Plot No. 50, Door No. 111, Taluk Office Road, Venkatapuram, Saidapet,Chennai - 600015, Tamil Nadu, India, Mobile: +(91)-9840072834, +(91)-9841072834 |
| KS Plastic Group | F-33,
Okhla Industrial Area, Phase-1 New Delhi - 110020, Delhi, India |
| Jai Sunlight Systems | No.
A6, Mullai Nagar, Damodar Swamy Layout, Neelikonampalayam Post Coimbatore - 641033, Tamil Nadu, India |
| Electrical Consultants & Engineers | 319-320, 1st Floor, Shivaji Commercial Complex, Ravi Nagar Square, Amravati - 444605, Maharashtra, India, Mobile: +(91)-9225700821, +(91)-9225700238 |
| Ultron Electronics | Plot
No. 1-9-423/22, Opposite Road To Mandala Laxmamma Garden Function Hall,
Parimala Nagar, ECIL Post, Hyderabad - 500062, Mobile: +(91)-8377800736 Telangana, India |
| Raman Power Solutions Pvt Ltd | 16-2-227/190,
Sardharpatel Nagar, Opposite Nizampet Cross Road, Kukatpally Hyderabad - 500072, Telangana, India |
| Tapashwi Power Controls | Plot
No. 32, Prashanthi Nagar, Kapra, ECIL Post Hyderabad - 500062, Telangana, India |
| Sanvi Electronics | Plot No. 16, 1-9-323/16/1B, Hanuman Nagar, Kushaiguda, Hyderabad - 500062, Telangana, India, Call Us: (+91)-8048022275, Mobile: +(91)-8978900919, +(91)-9494439050 |
| Asthra Projects | LIG- B, 329, HMTV Road, Dr. A. S. Rao Nagar, ECIL Post, Hyderabad - 500062, Telangana, India, +(91)-8008822555, +(91)-8686363068 |
| V2 solar | No. 7-4-97, Opposite BBR Hospital, Above Andhra Bank ATM, Balanagar, Hyderabad - 500011, Telangana, India, Call Us: (+91)-8048429698, Mobile: +(91)-9848754313, +(91)-01000155 |
| Universal Mega Solar Private Limited | No. 8-2-270/1, 2nd Floor, Banjara Hills, Road No. 2, Opposite Brand Factory , Hyderabad - 500034, Telangana, India, Call Us: (+91)-9643203341, Mobile: +(91)-9848199369, +(91)-9032702727 |
| Sree Vaishnavi Solar Energy Systems | H.No. 155, 1st Floor, Netaji Nagar, 'X' Roads, HI-Tension Road, Kapra, Hyderabad - 500062, Telangana, India,Call Us: (+91)-8048557383, Mobile: +(91)-9912760934, +(91)-95269991 |
| Solar Idea Pvt. Ltd. | No. 8-2-277/A/7, Plot No. 126, Road No. 2, Banjara Hills, Hyderabad - 500034, Telangana, India, Call Us: (+91)-8048083199, Mobile: +(91)-7032660066, +(91)-9866987719, Telephone:+(91)-(40)-49464332 |
*Note: The above information (manufacturer's list) may subject to change without any notice and we are not responsible for such happenings.
However the source for Manufacturers list is indiamart.com
However the source for Manufacturers list is indiamart.com
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ReplyDeleteThank you so much for sharing. Keep updating your blog. It will very useful to the many users
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