One Key sucses off system is balancing. Many system. Off grid sucsesfully implemented by good balancing. Software make easier to make balancing. Sample use PV syst. Detail user need, solar radiation, inclination, Location coordinat and loses system. Average cost off grid system 7-10USD per watt. It's difficult to decrease. The most high cost is battrey or energy storage and inverter.
We can cost down DC off grid system by using DC load direct by using DC harware.
1.LED Lamp DC 12 Volt.
2.DC TV. 12Volt.
3.DC Air Conditioner.
4.DC Computer system. CPU&LED.19 Volt = using converter 12-19Volt.
5.DC phone charger.
6.Using Smaller Inverter off grid only for load with no DC system.
The step can significant decrease cost of system off grid photovoltaic system.
For cheaper mounting system using roof top. For energy storage using Lithium battrey is better in life time (Charge-discharge more than 1000cycle) and higer temperature up to 45 degree celcius.
Using software only for PV and battrey calculation. For electrical system can develop manually. Because limit of software.
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