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Solar Savings
Calculator

Enter your monthly electricity bill and get an instant estimate of system size, panels needed, projected savings, and payback period.

Powered by Race-Conz IT Solutions — Your Trusted Solar Partner in Bicol

4.3h Avg Peak Sun Hours (Bicol)
₱50k Baseline cost per kWp
5–8yr Typical payback period
0.7kg CO₂ per kWh (PH grid)

Estimate Your Solar System

Fill in your electricity details below. All figures are estimates based on standard Philippine solar parameters. Contact us for a site-specific assessment.

Your Details

Cost Parameters

Check your Meralco or CASURECO bill for your latest amount due.

?The all-in price you pay per kilowatt-hour, including generation, transmission, and taxes. Found on your monthly bill as the effective rate.

Default: ₱13.82 (Meralco March 2026). Update to your local rate (e.g., CASURECO) for a closer estimate.

Load Profile
?How much of your current bill you want solar to cover. 80% is a practical target; 100% means a larger, fully off-grid-capable system.
80%

100% = fully off-grid. 80% is a common practical target that keeps system cost manageable.

System Specs
?The rated power of one panel under standard test conditions. Higher wattage means fewer panels for the same system size. 550W is a common 2026 monocrystalline spec.

Default: 550W monocrystalline (standard 2026 spec). Adjust if you have a specific panel in mind.

Add battery backup sizing?
?How many days the battery should power your backup load with no sun or grid. 1 day is typical for brownout cover; 2+ for off-grid reliability.

For brownout backup of essential loads, 1 day is a sensible default.

?The portion of your daily energy use you want the battery to cover (lights, fans, fridge, router). Backing up everything is far more expensive.
40%

40% covers most essential-load backup scenarios.

?The nominal DC voltage of the battery bank. 48V is standard for most residential and commercial hybrid systems; 24V for small setups.

48V is the common choice for hybrid inverters in 2026.

?How much of the battery's capacity you can safely use per cycle. Lithium (LiFePO4) allows ~80–90%; lead-acid only ~50%. Higher DOD means a smaller battery for the same usable energy.

Default: 80% for LiFePO4 lithium. Use 50% for lead-acid.

Results

Results Ready
Est. Monthly Usage
Enter your details
Recommended System Size
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Panels Needed
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Inverter Size
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Payback Period
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Est. Monthly Savings
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Est. Annual Savings
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Est. System Cost
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CO₂ Offset
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All estimates are indicative only. Actual results depend on site conditions, shading, local utility rates, and equipment specification. Contact Race-Conz for a site assessment.

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Solar in the Philippines — FAQ

Answers to the questions we get most from homeowners and businesses in Bicol considering solar.

A residential solar system typically ranges from ₱150,000 to ₱400,000 depending on size. A useful baseline is ₱50,000 per kilowatt-peak (kWp). A 3kWp system, which suits most homes spending ₱3,000–₱5,000 per month on electricity, runs around ₱150,000 before any government incentives or net metering credits. Commercial and industrial systems cost more upfront but benefit from faster payback due to higher daytime consumption.
Most residential systems pay back in 5 to 8 years. Commercial systems with higher consumption patterns often achieve returns in 4 to 6 years. Meralco and CASURECO rates have increased year-on-year, which shortens payback periods compared to prior estimates. After payback, the system continues generating free electricity for 20–25 years.
The Bicol region, including Naga City and surrounding areas, averages around 4.3 peak sun hours (PSH) per day. PSH is not total daylight — it represents the equivalent hours at full 1,000 W/m² irradiance. Our calculator uses this figure. Coastal areas with less cloud cover may see higher values; heavily shaded or typhoon-track locations may see lower effective output.
Yes. Under the Net Metering Program regulated by the Energy Regulatory Commission (ERC), grid-tied system owners with capacity up to 100kWp can export surplus electricity and receive bill credits from their distribution utility. In Bicol, this means filing with CASURECO or your local DISCO. The application process requires a certified installer, metering equipment, and ERC-approved documentation. Race-Conz handles this as part of full-service solar installation.
A standard grid-tied system automatically shuts down during an outage as a safety measure to protect linemen working on the grid. To maintain power during brownouts, you need either a battery storage system or a hybrid inverter with battery backup. Race-Conz assesses your critical load requirements and recommends the right configuration, whether that's a basic battery bank or a full hybrid setup with generator backup.
For a typical rooftop system, you generally need a Building Permit from your local government unit, an Electrical Permit and sign-off from a licensed Professional Electrical Engineer (PEE), and a Grid Connection Agreement from your distribution utility if you plan to export power. Large-scale systems may require additional clearances from the DOE. Race-Conz manages the full permitting process as part of project delivery, so you don't have to deal with the paperwork yourself.

Ready to go solar?

Get a free site assessment from Race-Conz. We'll check your roof, load profile, and local utility connection, then give you an accurate system proposal at no cost.

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This calculator provides estimates only. Actual system size, cost, and savings depend on site conditions, shading, equipment, and utility tariffs. Race-Conz IT Solutions is not liable for decisions made solely on this tool's output. Always get a professional site assessment before purchasing.