Knowledge

Understand solar, from how it works to staying safe

See how solar panels, batteries, and the grid work together to power your home with a live interactive diagram, and why a standards-compliant install matters for safety.

How it works

How solar energy works, simulated

Solar with battery storage: use your own power on your schedule and keep essentials running during grid outages. Monitoring helps you improve self-consumption over time.

Switch on-grid and hybrid, day and night, or a simulated outage. Tap the sun or utility pole on the diagram. kW values are illustrative.

Reading the flow lines

Solar production
Grid import & export
Battery charge & backup

Safety

What goes wrong when solar is installed below standard

A rooftop system carries grid-level voltage and sits on your home for 20 years. Cut corners on wiring, grounding, or mounting and the failures show up later, when they are expensive and dangerous to fix.

Firefighters tackling a rooftop solar panel fire

Fire from DC arc faults

Loose connectors, undersized cable, and unprotected DC runs create high-energy arcs that can ignite the roof. Faults often stay hidden until heat or smoke appears.

Burnt photovoltaic DC cables after an electrical fire

Electric shock and bad grounding

Missing earth bonding and skipped isolation leave live metal exposed. A single wet-season fault can energise the frame, the rail, or the roof itself.

Fire brigade responding to a damaged rooftop solar installation

Roof damage and leaks

Wrong anchors and unsealed penetrations let water in and overload rafters. Damage spreads under the panels where you cannot see it until the ceiling stains.

Burnt electrical surge arresters from a solar system fire

Equipment failure and lost warranty

Low-grade parts and out-of-spec wiring burn out inverters and components early, while undocumented work gives the manufacturer a reason to reject the claim, leaving the replacement cost on you.

Photos: Chiswick Chap, Asurnipal / Wikimedia Commons (CC BY-SA 4.0)

Every L2 Energy install is surveyed and documented, with all equipment warranties kept on the cloud, done to certified installer standards, plus a 3-year workmanship warranty.

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Market & policy

Where rooftop solar stands, in Thailand and worldwide

The bigger picture behind a rooftop decision: how policy, prices, and technology are trending at home and abroad. Follow the reference links for the current details.

Thailand

Illustration of a home and the grid exchanging power both ways through a meter

Energy Regulatory Commission

Grid export rules for home solar are opening up

Residential rooftop programmes and the terms for sending surplus power back to the grid have been widening over successive rounds. What you can export, and at what value, depends on the scheme in force when you apply.

Reference

Illustration of an online form with a checkmark and a power plug

Provincial Electricity Authority

Utilities are moving connection approvals online

PEA and MEA have been shifting interconnection and metering requests onto online channels, which tends to shorten approval times. A compliant, well-documented install still moves through fastest.

Reference

Illustration of a rising bar chart with a sun

Ministry of Energy

National plans point to more solar and storage

Thailand's Power Development Plan has trended toward a larger share of solar and battery storage, with distributed rooftop generation a growing part of the mix alongside utility-scale projects.

Reference

Around the world

Illustration of a rising line chart with a bright sun

International Energy Agency

Solar leads new power capacity worldwide

Solar has been adding more new generating capacity each year than any other technology, led by China, the United States, and India. The IEA's renewables tracker keeps the running numbers.

Reference

BloombergNEF

Panel prices sit far below their past levels

A sustained manufacturing glut has kept module prices low, which improves payback maths for rooftop systems even where feed-in and export tariffs have been trimmed.

Reference

Illustration of a home with a charging battery pack

Reuters

New rooftop solar increasingly comes with a battery

In markets such as Europe and Australia, more households pair solar with storage as time-of-use pricing and lower export rates make using your own power more valuable than selling it.

Reference

Reference links point to third-party organisations. L2 Energy shares them for background and does not control their content. Check the source for the latest figures and rules.