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Meritsun Typical Design of Solar Photovoltaic Off-grid Systems

Meritsun Typical Design of Solar Photovoltaic Off-grid Systems

2021-03-18

Due to differences in the level of economic development, there are many remote areas still with basic electricity problem. The solar photovoltaic off-grid power generation is designed to meet the basic electricity needs of people living in areas with limited or no electricity. Installing a photovoltaic off-grid energy storage system is more economical, environmentally friendly and safer than the use of oil-fired power generation.


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The solar photovoltaic off-grid power generation system consists of solar panel, controllers, inverters, batteries and other power distribution systems. Different solutions can be chosen according to the user's load, power consumption, local sunlight time to adapt to different user needs.48V5kW solar photovoltaic off-grid system solution

Customer’s power demand: 4 Lamps total 200W, 100W TV set, 800W refrigerator, 600W air conditioning, 1000W rice cooker, 500W washing machine, total load power is 3200W, considering backup power at night, average 3 hours per night, 48Vdc system, which is installed in a house


System program design:

1/ The total load power is 3200W, 48Vdc system, so we choose 48V5kW integrated off grid inverter with controller, the inverter built-in 60A mppt solar controller, support 6kW PV access. 

2/ Considering 3 hours battery backup time requirement, the battery power is 9600Wh, we prefer to use Meritsun long life Powerwall 10kWh 48V200AH lithium iron phosphate battery. 

3/ Considering the local average sunlight time is 5 hours per day, the PV conversion efficiency is 0.8, the PV module is 2.61kW in total, choose to use 9 pieces of 290W Mono solar panel.



                                                                                                                                                                                (The picture comes from the Internet)

48V12kW solar photovoltaic off-grid system solution

Customer’s power demand: Lamps total 500W, air conditioner total 5000W, refrigerator total 4200W, TV sets total 1300W, install in a small hotel, total 8 rooms, so total load power is 11000W, considering backup power at night, average 6 hours per night, 48Vdc system.


System program design:

1/ The total load power is 11000W, 48Vdc system, so we choose 2 units 48V6kW integrated off grid inverter with controller in parallel to 48V12KW, each inverter built-in 120A mppt solar controller and support 12kW PV access. 

2/ Considering 6 hours battery backup time requirement, the battery power is 66000Wh, we prefer to use 7 pieces of Meritsun premium Rack module 10kWh 48V200AH lithium iron phosphate battery in parallel connection, and provide a strong cabinet for easy installation and save the space. 

3/ Considering the local average sunlight time is 4 hours per day, the PV conversion efficiency is 0.8, the PV module is about 20.6kW in total, choose to use 64 pieces of 320W Mono solar panel.


                                                                                                                                                                                                               (The picture comes from the Internet)

At present, Meritsun company has a full range of green high-tech lithium iron phosphate batteries, with off-grid cases more than 100 countries and regions including Asia, Africa and Europe,etc. Our aim is helping more people enjoy the affordable and lighting solar system with Meritsun outstanding Lifepo4 battery.




By Jane Huang

MeriTech Power Limited

export-7@meritsunpower.com

MeriTech is a professional LiFePO4 battery manufacturer since 1999, focus on alternative smart energy storage application. We produce Cells, house made BMS , module and integrated system solutions. 20 years, we do only one thing, Energy Storage Batteries. We proud of excellency: 100+R&D teams, 1368 employees, 48 fully automatic productions lines, 150,000 square meters factory .MeritSun,The Best Power in the SUN.





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