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# A brief description of the configuration

Solar off-grid system components: inverter + battery + controller + solar panels PV

(Such as: motor, air conditioning, electric rivets, pumps and other equipment to start the impact of the device), the inverter, Resistive load directly added; inductive load to be enlarged 3-7 times; A1 series zoom 2.5-3 times; other full amplification 4 times the calculation;

For example: the customer load 100W lights, 200W TV, 300W computer (resistive load); there are 1000W pump, 500W induction cooker (emotional load); if the A1 series, the inverter power: 100W + 200W + 300W) + (1000W + 500W) * 3 = 5100W; inverter can only be enlarged, so the choice of 6000W;

If you use other series of products, the inverter power: (100W +200W +300W) + (1000W +500W) * 4 = 6600W; inverter can only zoom, so use 7000W;

Inverter AC input voltage, AC output voltage, frequency (determined by the customer, or where the national grid decision)

Inverter DC voltage (some customers decide that some will tell you the solar panel connection to decide, or decide on their own)

Battery - → determined by actual load and storage power supply time - → actual load (sum of all loads directly) Storage power supply time (determined by the customer)

For example: the customer load 100W lights, 200W TV, 300W computer (resistive load); there are 1000W pumps, 500W induction cooker (emotional load);

The actual load sum is: 100W + 200W + 300W + 1000W + 500W = 2100W, if the customer said the storage power supply time is 3 hours;

That battery should be the total storage capacity: 2100W * 3H = 6300WH, which is 6.3 degrees electricity

And then determine the inverter DC voltage, such as after the determination of DC48V

Single unit single cell capacity = 6300WH / 48V = 131AH

And then refer to the battery model to determine the battery, if the customer price requirements, you can use 120AH;

If the customer on the high demand, you can use 150AH;

Number of battery sections = system DC voltage / single battery voltage

As above, if the choice of 12V battery, battery section = 48V / 12V - = 4, that is, 150AH / 12V battery 4;

If you choose 2V battery, battery section = 48V / 2V - = 24, that is, 150AH / 2V battery 24;

(250AH the following, as far as possible with 12V battery, 250AH or more, you can use 2V battery)

Solar panels PV- → customers to determine or according to electricity consumption calculation

DC12-23V PV board defaults to DC12V

DC24-38V PV board defaults to DC24V

Of which 200W / 24V most commonly used;

First select the monolithic PV board battery, so as to determine the number of single PV board;

Normal 5 hours per day effective light calculation

For example, the battery should be the total storage capacity: 2100W * 3H = 6300WH, which is 6.3 degrees

Solar panel PV power = (total storage capacity / 5H) / number of single PV panels

For example, if the system DC voltage is 48V, the choice of DC24V solar panels, that the number of single-group PV board is 2

Solar panel PV power = (6300WH / 5H) / 2 = 630W

It is to 630W / 24V solar panels, 2; but not so much of the solar panels, the general selection of 200W near, it can only multi-group parallel, and can be changed to 200W / 24V 2 series, divided into three groups in parallel;

Controller - → The total power of the solar panel determines the DC voltage is the same as the DC voltage of the inverter

Regardless of the parallel or series, all the sum of the sum of the sum;

As for example, with 200W / 24V solar panels in series, three groups in parallel, a total of six; total power is 1200W

If the inverter selection DC48V controller size = 1200W / 48V = 25A, must choose a number of;