01
Bill analysis
Study usage patterns to size the right system
Home | Shop | SME | Factory
Turn monthly electricity bills into a long-term investment
Design and install solar rooftop for homes and businesses, sized from real usage for a system that is right, worthwhile, and safe.
Nexa Energy
National-grade solar rooftop
Homes · Shops · SMEs · Factories
What's your monthly bill?
Let us calculate a solar system for free
Find the right solar size in minutes
Enter your current bill to estimate system size, savings, and simple payback.
End-to-end solar, in one place
02
Site survey
Inspect roof, electrical system, and site constraints
03
System design
Design solar size, inverter, and protection
04
Equipment sourcing
Select certified-brand components
05
Installation
Installed by a vetted team
06
Inspection & handover
Commissioning checks before go-live
07
Documentation
Support paperwork in the agreed scope
08
After sales
Warranty and ongoing care
Solar Home
For homes that want lower bills and more energy security
View detailsSolar Business
Shops, restaurants, offices and SMEs with daytime loads
View detailsSolar Factory
For factories and businesses with high electricity costs
View detailsSolar Hybrid
Solar + battery for backup power
View detailsPackages
PackagesSolar 5 kW
บ้านและธุรกิจขนาดเล็ก
From 225,000 THB
Request a quotationSolar 10 kW
บ้านใหญ่ / ร้านค้า
From 430,000 THB
Request a quotationSolar 20 kW
สำนักงาน / SME
From 820,000 THB
Request a quotationSolar 30 kW
โกดัง / โรงแรมขนาดเล็ก
From 1,180,000 THB
Request a quotationSolar 50 kW
โรงงานขนาดกลาง
From 1,850,000 THB
Request a quotationCustom System
Designed around your actual load
Priced after design
Request a quotationHow it works
- 1
Send your bill
- 2
Usage analysis
- 3
Solar assessment
- 4
Site survey
- 5
Design and quotation
- 6
Installation
- 7
System check
- 8
Handover and after-sales
Why Nexa Energy
- Designed from real electricity usage
- Transparent pricing
- Certified equipment brands
- Vetted installation teams
- Quality inspection process
- Warranty coverage
- After-sales support
- From homes to factories
Let us help with solar paperwork
We help prepare and track documents related to installation and interconnection, within the agreed service scope.
More than installation
Tools that help you decide, install, and look after a solar system.
01
Smart Solar Calculator
Estimate system size and payback from your electricity bill.
Try the calculator02
Document Assistance
Track required documents and status in one place.
View document service03
Equipment Comparison
Compare panels, inverters, and batteries before you decide.
Compare equipment04
Smart Monitoring
See production, savings, and system alerts after install.
View sample dashboardRestaurant 30 kW case
Before: 30,000 THB/month
After: 18,000
Savings: 12,000 / 144,000 THB
Projects
คุณอารยา
เชียงใหม่ · Solar Home 10 kW
“The team sized from our real bill so we did not overbuy.”
คุณสมชาย
ชลบุรี · Solar Factory 50 kW
“Installation was structured with a proper handover check.”
FAQ
How much can solar reduce my bill?
It depends on your bill, roof, and usage. A well-sized system typically cuts daytime costs.
How many years to pay back?
Typically around 4–8 years depending on size and tariff.
Can I use solar at night?
On-grid systems use the grid at night. Batteries can cover backup needs.
Does solar work during an outage?
Standard on-grid systems shut down for safety. Hybrid + battery can backup.
What is on-grid solar?
A grid-tied system that uses solar first, then the utility.
What is hybrid?
Solar combined with battery storage.