72 in-depth solar energy articles for homeowners & installers
How much you can actually save — and how fast it pays for itself.
The simple bill-to-kW formula every Filipino homeowner should know.
JA Solar vs Trina vs LONGi vs Jinko — which one is right for you?
When a hybrid system makes sense, and when you're wasting ₱80,000+
Your electric meter can literally run backwards. Here's how.
How to avoid getting scammed or overcharged on your solar installation.
The component most people overlook — and why it matters more than the panels.
Solar is low-maintenance — but "low" is not "zero." Here's what to do each year.
Businesses pay ₱14-18/kWh. Here's why going solar is a no-brainer for commercial users.
The Philippines gets 20 typhoons a year. Here's how to make sure your solar survives.
Before you sign anything, make sure you understand what you're paying for.
Don't have ₱300,000 cash? You still have options. Here's how to go solar without breaking the bank.
Stop using Excel. Here's how to generate a complete, branded solar proposal in minutes.
The document Meralco requires for net metering — auto-generated from your system config.
Never lose a hot prospect again. Here's how to track every lead from inquiry to installation.
Prices change every month. Here's how to keep your BOM always current without rebuilding from scratch.
The average installer wastes 45 minutes per quote. Here's how to do it in under 5 minutes.
Before a homeowner calls you, they've already judged you based on what they see online. Is your profile ready?
The rules governing every solar installation in the Philippines — and the violations inspectors catch most often.
Undersized cables cause fires. Oversized cables waste money. Here's the exact calculation.
The panel technology landscape has changed dramatically. Here's what each actually means for your roof.
Not all lithium batteries are equal. One is dramatically safer for home use in a tropical climate.
A good installer surveys your roof before quoting. Here's exactly what they're looking for.
If your installer is quoting you a standalone charge controller for a new system, ask questions.
Proper grounding is the difference between a lightning strike that damages your inverter and one that burns down your house.
Get this wrong and your inverter underperforms — or shuts down completely.
The counterintuitive design principle that maximizes your system's annual energy production.
Meralco's peak hours cost more. A smart hybrid system automatically avoids them.
The technology works. But on most Philippine rooftops, you're paying extra for very little gain.
Your family is home alone, the electric bill keeps climbing, and you can't supervise the installation. Here's how to do it right from abroad.
Most people don't think about this — and end up with the wrong solar system.
The real answer — with actual watt numbers and daily kWh for each appliance.
It's not how many hours the sun is up. It's a specific calculation that installers use.
Year 1 you're down ₱169,000. Year 3 you're even. Year 25 you're up ₱3.3 million.
It's not just about your bill. Solar physically reduces how much power you draw from the grid.
In 5 minutes you'll know your system size, cost, payback period, and 25-year cashflow — all for free.
Undersized cables are the #1 cause of solar fires. Here's how to get it right.
The exact calculation method used by licensed electrical engineers to design stand-alone solar systems.
Philippine climate is among the harshest for solar panels. Here's exactly how much output you lose — and how to recover it.
Net metering lets Meralco pay you for excess solar. Here's exactly how to apply.
Salesperson says microinverters are always better. Engineer says: it depends. Here's the honest analysis.
You don't own the roof — but you can still go solar. Here are your real options.
Your inverter app shows dozens of numbers. Here are the 7 that actually matter.
Lightning surge destroyed a ₱180,000 inverter in Cavite last typhoon season. An ₱8,000 SPD would have prevented it.
Most solar quotes show optimistic payback numbers. Here's how to calculate the honest one yourself.
Your 550W panel won't produce 550W in year 20. Here's exactly how much it degrades — and how warranties protect you.
Not every roof is solar-ready. Here's the 8-point checklist engineers use before recommending a system.
A 22% efficient panel isn't always better than a 20% panel. Here's what efficiency actually means for your roof.
Two quotes for "5kW solar" can differ by ₱120,000 — and both are technically correct. Here's how to compare them properly.
Every hybrid system uses one of two coupling methods. The wrong choice costs you 10-15% in efficiency losses.
Connecting your solar system to the Meralco grid requires specific technical compliance. Here's exactly what's required.
Commercial electricity rates are higher than residential. That makes the solar business case even stronger.
A battery without a BMS is like driving a car without a dashboard — eventually something catches fire.
The racking holds your panels for 25 years through typhoons, heat, and rain. Don't let your installer cheap out on it.
Your solar system stops working during a Meralco blackout — intentionally. Here's the safety reason why.
One shaded panel can cut your entire string's output by 30%. Here's how to solve it properly.
Your car park can generate electricity while shading your vehicles. Here's what a solar carport costs and produces.
There are over 500 solar installers registered in the Philippines. Here's how to separate the good from the dangerous.
Commercial Meralco customers pay for kVAR — reactive power. Here's how solar inverters interact with power factor charges.
An EPC contract is your legal protection for a ₱200,000+ investment. Most homeowners sign without reading these 6 critical clauses.
DepEd schools pay millions in electricity annually. Here's how government buildings can go solar — and who pays for it.
The average Philippine home wastes ₱800–1,500/month on appliances that are "off" but still drawing power.
You don't need ₱280,000 cash to go solar. Here are the financing options available in 2026.
Improper earthing is the hidden defect in most Philippine solar installations. Here's what's required by code.
The first wave of Philippine solar panels will reach end-of-life by 2030. What happens to them?
A 3kW solar system can eliminate 60-80% of a sari-sari store's electricity bill. Here's how to size it correctly.
Most homes use single-phase 220V. But if your Meralco connection is 3-phase, your solar system and breakers must match — here's the difference.
Connect too many panels in series and you blow the inverter. Too few and it never turns on. Here's the exact calculation — with Philippine temperatures.
A 3% voltage drop on a 5kW solar system wastes 150W every hour the sun shines. Here's how to calculate it and choose the right cable size.
Solar panels can produce more current than their rated Isc under fault conditions. NEC 690.8 requires your DC wire to handle 1.56× panel short-circuit current — here's why and how.
A 5kW inverter connected to a 20A breaker will trip under full load. A 50A breaker on a 5kW inverter is oversized and a code violation. Here's the right calculation.
An undersized earth wire won't protect you during a fault. Philippine wire sizes like 3.5mm² and 5.5mm² don't appear in the code tables — here's how to size correctly.
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