This you need to setup a DIY solar system:
 

Small Solar System 3 kW Big Solar System 10 kW
   
We use this items at Baan Denmark: We do not have a big system, We do not use aircondition.
   
  6 Solar panels 170 watt
3 MWP Charge controler 10 A
3 Lead acid batteries12 Volt 85 Ah (1020 Watt)
6 DC breaker 20 A
6 set Pari Connector
1 Inverter 2000 Watt
22 Solar panels 450 Watt
2 MPPT Carge controler compinated Inverter
4 LifePo4 Solar batteries 12 Volt 200 Ah (2700 Watt)
4 DC breaker 40 A
22 set Pari Connector

Solar Panels:


18 Volt 170 Watt 10 A

37 Volt 450 Watt 10 A

Charge controler:


MWP 10 A Only for lead acid batteries


MPPT 40 A 10kW inverter use for LifeP04 batteries

Batteries:


Lead acid batteries 12 Volt 85 Ah = 1020 Watt

LifeP04 Batteyy 12 Volt 200 Ah will be great. = 2400 Watt

DC breaker:


DC p2 breaker 10 A

DC p2 breaker 40 A

Inverter:


DC 12 Volt Input, AC 230 Volt Output.

DC 48 Volt Input, AC 230 Volt Output.

Cables:


Solar panel cable 100 M 4 sq. mm. Use for both systems


Pari Connector connect to the solar panels. Use for both systems


Battery Cable 8 M 35 sq. mm. Use for borh systems

Pari Connector connect to the solar panels. Use for both systems

Maintenance:


Distilled water


Battery tester
 

How to connect it all together?:


8 panels 12 volt 4000 Watt

8 panels 48 Volt 8000 Watt


2 x 170 Watts solar panels. for 1 x 85Ah (1020 Watt (1 kW)) Lead acid battery
This construction works perfect.
Just remember the MWP charge controler must be 10 A.
A Lead acid battery must be charged ved ABSOLUTE maximum 15,5 Volt.
The MWP charger like this model is valid for Lead acid batteries ONLY!!
The MWP charge controler charge as maximum 14,4 Volt.
Even it is a 10 A it can still charge 17,5 A
And this is also ABSOLUTE maximum for a Lead acid battery.
Here should be an exalple, how to setup that system...
BUT I must be honestly to say.
I have never try to setup this system before,
so I will NOT make an example.
Just if I do it wrong..
Safe T come first.

Economi:

I spend That money for our 3 kW solar system.

 
   

Baan Denmark @ Mukdahan

 
Unit Text Unit Price Total
6 Solar panel (170 Watt) 2150 12.900
6 Pari Connector (3 female 3 male) 25 150
45 M Red 4 sq.mm. Cable (Solar Panel) 9 405
45 M black 4 sq.mm. Cable (Solar Panel) 9 405
3 MWP Charge Controler 95 285
6 DC 20 A breaker 75 450
9 M Red 6 sq.mm. Cable (Charge Battery) 12 108
9 M Black 6 sq.mm. Cable (Charge Battery) 12 108
3 Lead acid batteries 85Ah (1020 Watt) 2500 7500
6 Battery cabelconector 45 270
2 M Black 36 sq.mm. battery cable 50 100
3 M black 50 sq.mm. inverter cable 89 267
1 Inverter 2000W 5000 5000
       
  Total price   27.948

 
 

This system safe me for 2/3 part of my electric bill every month
So I save 850 baht every month.
If I double up our system I will be 100% free for city electricity.
27.948 x 2 = 55.896
55.896 baht / 850 baht per month = 43,84 (44) Month ~ 3,66 Years ~ 3Y 7M
will our amount be 0,-

The batteries in both systems do not have eternal life.
then we give it 5 years to live in should an additional 7500 baht be used for new battetier.
but since we now save 100% of our electricity bill,
we have a savings of 1275 baht every month.

Again I have never setup that system before ,
So I can NOT give a price example SORRY!!