Project Requirements:
- Total load = 5kW
- Battery backup time = 1 hour
- Primary source = Solar PV
- Secondary source = Grid
- Tertiary source = Battery Bank
System Design:
- Solar Panels:
Wattage of single panel = 235Wp
No. of solar panels = (Total load x 1.4) / 235
= (5000 x 1.4) / 235= 30 (rounded value)
2. Inverters:
Company = SMA
Two types of inverters (built in charge controllers) will be used.
a). Sunny Boy b). Sunny Island
a) Sunny Boy:
Requirement for sunny boy = 7000W*
* 5000W x 1.4 = 7000Wp
Suitable sunny boy (according to the requirement) = SMC 7000 TL
 |
| SMC 7000 TL |
Requirement for sunny island = 5000W*
* Sunny island runs the load, so its rating depends upon total load.
Suitable sunny island (according to the requirement) = SI 5048
 |
| SI 5048 |
According to the data sheet of SMC 7000 TL, the input DC voltage capacity of SMC 7000 TL is 750V. It has four inputs of solar PV arrays. The input voltage of one array must not be greater than 90 % of 750V.
Since the open circuit voltage of one solar PV panel is around 34V. Connecting 15 solar panels in series will give us (15*34) 510V DC which is smaller than 675V (90% of 750V).
So we can make two solar PV arrays, having 15 panels each. All the 15 solar panels will be connected in series in one array.
4. Battery Bank:
Battery rating is defined in terms of Ampere Hours (Ah). We can find out the Ah for battery bank according to the load and backup time.
Ah = (Load x backup time) / (DOD x PF x System Voltage)
Now
load = 5000
backup time = 1 hour
DOD (depth of discharge) = 0.6
PF (power factor) = 0.8
System voltage = 48V
So
Ah = (5000 x 1) / (0.6 x 0.8 x 48)
= 217.01
So now we need 217Ah @ 48V for battery bank.
Rating of single battery = 200Ah @ 12 V
Connecting four batteries of above rating, in series, will give us 200Ah @ 48V.
System Topology:
Circuit Diagram:
a) HOW TO DESIGN AN OFF-GRID (HYBRID) SOLAR PV SYSTEM USING SMA SOLAR INVERTERS
b) CIRCUIT DIAGRAM FOR 5KW OFF-GRID SOLAR PV SYSTEM
2 comments:
I really appreciate the person who has written such a wonderful blog. Your simple use of language and no frills makes the post a great read.
Off Grid Solar Systems
Solar Dock
30 Days Free SEO Trial
Farming is the only profession where you can work 16-hour days, get sunburned in the middle of winter, and still be told you’re “living the simple life.” It’s a magical world where weather forecasts are more suspenseful than a thriller movie—will it rain, or will you just stand outside shaking your fist at the sky in frustration? Either way, Mother Nature is in charge, and she has a sense of humor.
Let’s talk about farm animals—those adorable, fluffy creatures that turn into rebellious hooligans the moment you turn your back. Chickens? Escape artists with no respect for fences. Cows? The real CEOs of the farm, casually blocking roads like they own them. And don’t even get me started on goats—those four-legged acrobats will climb on anything, including your patience.
Farming is also where advanced technology meets good old-fashioned stubbornness. Farmers can program GPS-guided tractors, monitor soil health with satellite imagery, and still fix a broken fence with nothing but baling wire and sheer determination. If farmers ever went to space, NASA would be amazed at how they could fix a rocket with duct tape and a hammer.
New Step Technology Gurugram
Then there’s the joy of growing crops, a process that requires backbreaking labor, endless weeding, and an optimistic spirit. You plant seeds with hope, nurture them with love, and then watch in horror as a single rabbit undoes three months of work in one afternoon. If farming teaches anything, it’s patience—and the importance of having a dog that actually chases pests instead of sleeping on the job.
At the end of the day, despite the unpredictable weather, mischievous animals, and never-ending work, farming is a life filled with humor, adventure, and a deep appreciation for the land. Sure, you might spend more time talking to your tractor than to actual people, but nothing beats the feeling of harvesting a field you nurtured from the ground up—except maybe a nap in the hay after all that hard work. 🌾🚜😆
Post a Comment