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15KW solar system calculator

  • Xindun
  • January 05, 2023

Customers always ask how to choose a solar energy system configuration. When it comes to this topic, many people feel very confused. It’s very important to customize a solar system configuration and choose the right inverter with right power size in practice. To select the quantity of solar panels and the batteries is also important too!

Today we take 15KW for example, how to customize a 15KW solar system configuration? 

 

1.Solar Inverter

We should confirm the system type. Is it an ON GRID SYSTEM, an ON/OFF GRID SYSTEM or an OFF GRID SYSTEM? The system type determines the inverter type and it needs to carry batteries or not. Let’s  take OFF GRID SYSTEM for example, a 15KW OFF GRID solar system should configure an OFF GRID 15KW 192VDC Inverter. 

Power Size:
Rated Power: 15KW/18.75KVA,
Battery Voltage: 192VDC

Feature:
◆ Pure sine wave output;
◇ High efficiency toroidal transformer lower loss ;
◆ Intelligent LCD integration display;
◇ AC charge current 0-20A adjustable; battery capacity configuration more flexible;
◆ Three types working modes adjustable:AC first, DC first, energy-saving mode;
◇ Frequency adaptive function, adapt to different grid environments;
◆ Built-in PWM or MPPT controller optional;
◇ Added fault code query function,facilitate user to monitor the operation state in real time;
◆ Supports diesel or gasoline generator, adapt any tough electricity situation;
◇ RS485  communication port/APP optional.


2.MPPT Solar Charge Controller

A 15KW 192VDC Inverter System need to configure one piece 192V 100A  MPPT Solar Charge Controller. 

Parameter as following: 
Rated Current: 100A
Rated System Voltage: 192V
Max PV Input Voltage: 450V
PV array Max Power: 11.2kw*2
MPPT Tracking Voltage Range:240-360V
MPPT route number: 2
Recommended operating voltage range: 240-320V

 

3.Solar Panel

To determine the quantity of solar panels.Usually, the total power of the solar panels is 60%-100% of that of the inverter. (For 380 watt solar panel, it will be 24-40 pieces) we always configure it 70%, it will be 28 pieces 380 watt  solar panels in practical use( 7 pcs in series and 2 groups in parrallel*2 routes ). If the customer want to use the solar energy more efficiently, we will make it 90-100%(36-40 pieces 380 watt solar panels)

380 Watt Solar Panel Parameter as following: 
XD-380M-72;
Type: Monocrystalline module;
Pmax=380W;
Cell efficiency: 19.68%;
Vmp=38.56V; Imp=9.85A;
Voc=46.27V; Isc=10.53A;
Level: Grade A;
Warranty: 10 years;
Dimension: 1950x990x40mm;       

 

Off-grid 15KW Solar System Calculator

 

 

4.PV Combiner 

For the Solar System more than 5KW, we should configure PV combiner. Since the Solar System power size is 15KW, so we should prepare PV combiner for the system. As with 7 pcs in series and 2 groups in parrallel *2 routes solar panels, so the quantity of PV Combiner is 2 pieces, 2 in 1 out type.

PV combiner
XTC20NA-2T
2 in 1 out
1000VDC Protection 

 

5.Battery

The OFF GRID SOLAR SYSTEM operates with Battery. So we need to configure battery for it. Take 12V 200ah Sealed Lead acid for example, the system voltage is 192VDC, 192/12V=16, so the quantity of battery at least 16 pieces. A multiple of 16 will be suitable for the 15kw solar system,like 32 pieces if you want to storage more energy(the more battery, the more solar panels) .

Battery Type:Sealed Lead acid                        
Nominal Voltage:12V
Rated Capacity:200ah
Quantity:16 pieces
Maintenance free    

 

6.Solar Panel Mounting Rack
The Solar Panel Mounting Rack quantity is based on the quantity of the solar panels. 2 pieces solar panel need one set Solar Panel Mounting Rack. So 28 pieces solar panels need 14 sets Solar Panel Mounting Rack.

Quantity:14 sets
wind load:55m/s
snow load:1.5kn/m2
structure:Anodized Aluminum+stainless steel, Angle
adjustable,with installation parts

 

7.Other accessories for 15KW Solar System:Cables & MC4 Connector

25mm2 battery cable 15 pairs
4mm2 PV cable 300M
MC4 5 pairs


The following is the 15kw solar system calculator table:

 

Off-grid 15KW Solar System

Item No. Product Picture Description of Goods Quantity (PCS)
1 WD solar inverter3-year warrantyWD solar inverter

Solar Inverter:
WDT-153192-W100
15KW,192VDC
AC Output:230V,50Hz
Toroidal Transformer
Single phase, pure sine wave output
Transfer Time ≤4ms
LCD display

1
2 MPPT Solar charge controller

MPPT Solar charge controller:

PV Array Maximum Power:11.2KW*2

192V,100A.

Max.800 V PV input.  

2 Routes

1
3 10 year warrantySolar PanelSolar Panel

Solar Panel:
XD-380M-72;
Type: Monocrystalline module;
Pmax=380W;
Cell efficiency: 19.68%;
Vmp=38.56V; Imp=9.85A;
Voc=46.27V; Isc=10.53A;
Level: Grade A;
Warranty: 10 years;
Dimension: 1950x990x40mm;

28
4 PV combiner1000VDC Protection

PV combiner:
XTC20NA-2T
2 in 1 out
1000VDC Protection

2
5 Lead acid battery

Battery:
Battery Type :Sealed Lead acid      

Nominal Voltage :12V
Rated Capacity: 200AH
Maintenance free

16
6 Solar Panel Mounting RackAvailable for Different Mounting PlacesIron Roof,Tile Roof,Flat Roof,Ground

Solar Panel Mounting Rack:
wind load:55m/s
snow load:1.5kn/m2
structure:Anodized Aluminum+stainless steel, Angle
adjustable, with installation parts

for full system

7 CablesOptionalMC4 Connector

Cables & MC4 Connector:
25mm2 battery cable 15 pairs
4mm2 PV cable 300M
MC4 5 pairs

for full system

 

 

 

Application Area

Provide stable,reliable and safe solutions for families,islands,ships,other small photovoltaic power systems,especially the area of power shortage,power cut or load-shedding like Sri Lanka,USA,Canada,Australia,Brazil,India...

 

Now that you have known that how to calculate a Off Grid 15KW Solar System, what next?How to calculate the other Power Size Off Grid Solar System? Its simple really, just click on the WhatsApp chatting button, leave your details and you will hear back from one of our Sales consultants as soon as possible. Once you are on the WhatsApp with them they will provide you the required knowledge and assistance to calculate your own solar system. As soon as you give us the go ahead on the system we will spring into action and have your system on the roof within 8 to 16 weeks. So what are you waiting for? Lets get you on the path to use Off Grid Solar Power System to solve the electricity problem like power outage or load-shedding …