Articles and FAQs
Solar know-how, answers to common questions before installation, and a guide to caring for your system afterwards.
Solar Articles
Know-how for homeowners and businesses before deciding to install, written and reviewed by our engineering team.
Bills and value
Is home solar worth it? Check your electricity bill
How to read your bill, split daytime and night-time usage, and estimate your savings
Choosing a system size
3, 5 or 10 kW solar: which suits your home?
Matching system size to household size, appliances and roof area
Basics
On-grid, hybrid and battery systems: what’s the difference?
How each system works by day, at night and during power cuts
Installation
Permit steps for home solar installation
Documents, agencies involved, and what our team handles for homeowners
Benefits
THB 200,000 solar tax deduction: how to claim
Eligibility conditions and the e-Tax invoice you need
Maintenance
How to care for solar panels after installation for maximum output
What homeowners can do themselves, and what to leave to technicians
What permits do I need for home solar?
You need to notify or apply to your local electricity authority and other relevant agencies. Our team handles all the paperwork for you, and we will explain the steps after the site survey.
How many kW can a single-phase home install?
It depends on your local electricity authority’s requirements. Our engineers will check your meter and electrical panel, then recommend the right size, or an upgrade to three-phase if needed.
How do I use the tax deduction of up to THB 200,000?
It is a government measure for home solar installation. You need an electronic tax invoice (e-Tax), which we can issue. Conditions and timelines follow the latest announcement.
Will my roof leak after installation?
Our engineers inspect your roof type and condition before installation, then choose the right mounting method for each roof type. Installation work comes with a 2-year warranty.
Does solar still supply power during an outage?
On-grid systems stop supplying power during outages for the safety of electricity authority workers. To have power during an outage, you need to add a battery system.
Which cards can I use for 0% installments over 10 months?
Eligible cards and installment terms will be provided with your quote.
Post-Installation Maintenance Guide
Solar systems need little upkeep. What homeowners can do is observe and notify our service team. Any work on the roof or electrical equipment should be left to our technicians.
For your safety, never climb onto the roof or hose down the panels yourself while the system is running.
- Check output in the app regularlyCompare units generated each month and contact the service team if output drops unusually
- Watch for dust and dirt on panelsThick dust, leaves or bird droppings reduce output. Contact our cleaning team rather than climbing onto the roof yourself.
- Check the inverter status lightsNote any message or code on the screen, then send a photo to the service team via LINE
- Don’t switch system equipment on or off yourselfIf unsure, always call the service team first
- Notify us before roof extensions or repairsso our team can remove and reinstall the panels correctly
Get a Free Engineer Assessment for Your Home
Fill in a short form and the SCAN EARTH POWER team will contact you to book a site survey, or message us on LINE and send a photo of your power bill right away.