Tag

Naval

12 min

Shade on Solar Panels: What a Coconut Tree Really Costs You and How to Fix It

A little shade can cost more than you'd think, because panels are wired in series. We explain bypass diodes and half-cut panels, then model a 15 m coconut palm next to a roof in Naval using 10 years of PVGIS hourly sun data. A palm 6 m to the east, west or south cuts the nearest panel's yearly sunlight by about 13–15%; at 15 m it's about 2%. Plus the fixes, in the order we'd try them, and what the coconut law says about cutting the tree.

BiliranLeyte
12 min

TOPCon vs PERC vs HJT Solar Panels: Which Cell Type Makes Sense for a Hot Leyte or Biliran Roof?

TOPCon (N-type) panels lose less power in the heat and degrade more slowly than older PERC (P-type) panels, and HJT goes a little further. In Naval's climate, that heat difference is worth about 1.2% more energy a year for TOPCon and about 1.9% for HJT. We compared three real datasheets, PVGIS weather for Naval, and Philippine seller prices, where TOPCon was not more expensive than PERC.

BiliranLeyte
13 min

Cracked or Hot-Spotted Solar Panel? Will It Still Work, What It Costs You, and When to Replace It

A cracked solar panel usually still produces power, but how much it loses depends on what cracked. Cracked cells under intact glass often cost only a few percent. Broken front glass is different: it lets water in, can trip your inverter and start hot spots, and manufacturers say replace it. Here's how to tell which one you have after a typhoon, what each costs at BILECO rates, and why warranties rarely cover storm damage.

BiliranBrownouts
10 min

Solar Panels Near the Sea: Salt-Mist Ratings, Corrosion and Mounting Tips for Coastal Leyte and Biliran Homes

Most panel makers allow homes near the sea, with conditions. LONGi voids the warranty within 50 m of the sea, Trina requires glass-glass panels from 50 to 500 m, and Canadian Solar wants anti-corrosion modules within 100 m. Huawei and Sungrow say not to put inverters outdoors within 500 m of the coast. Here's what those rules mean for a coastal Leyte or Biliran roof: distance, IEC 61701 salt-mist tests, bolts and clamps, connectors, inverter placement and rinsing.

BiliranLeyte
Solar Leyte title card: do solar panels work on rainy days? On light-rain days at Naval from 2001 to 2025, panels got about 83% of a dry day's sunlight; heavy-rain days about a third; at night, zero.
11 min

Do Solar Panels Work on Rainy Days? 7 Myths About Rain, Clouds and Night in Leyte and Biliran, Checked With 25 Years of Data

Solar panels keep working when it rains in Leyte and Biliran, just at a lower level. Using 25 years of NASA satellite data for Naval, a light-rain day still gave about 83% of a dry day's sunlight and a heavy-rain day about a third. At night they make nothing, and a grid-tie system without a battery shuts off in a brownout even at noon. Here are seven common myths, checked.

BiliranBrownouts
Solar Leyte title card: how to compute a submeter electric bill in Leyte and Biliran. kWh used times ₱18.93, BILECO's September 2026 residential rate. Under ERC rules, a submeter rate shouldn't be higher than the rate on the landlord's co-op bill.
12 min

How to Compute a Submeter Electric Bill in Leyte and Biliran (2026): The Formula, BILECO and LEYECO Examples, and the ERC Rules

A fair submeter bill is simple: this month's reading minus last month's, times the per-kWh rate on the landlord's own co-op bill. At BILECO's September 2026 rate of ₱18.93, a room that used 120 kWh owes ₱2,271.60 for electricity. Here's the formula, worked examples for a Naval boarding house and a LEYECO IV apartment, what to do about common areas, and what the ERC's redistribution rules say landlords can and can't charge.

BILECOBiliran
Solar Leyte title card: Bank solar loans in the Philippines, BPI, BDO, Security Bank, RCBC and Landbank. Minimum bank solar loans run ₱200,000 to ₱1,000,000 at BPI and Security Bank, versus ₱168,000 to ₱330,000 for listed 3 to 5 kW solar packages.
17 min

Bank Solar Loans in the Philippines (2026): BPI, BDO, Security Bank, RCBC and Landbank Compared With Pag-IBIG

We read each bank's own pages on 17 October 2026. BPI and Security Bank have a named Solar Mortgage, BDO and RCBC finance solar through home loans, personal loans or card instalments, and Landbank has no solar loan for individual homeowners. Minimums start at ₱200,000 to ₱1,000,000 and most need a house or car as collateral, which is more than many 3–5 kW systems in Leyte and Biliran cost. Terms, fees, worked examples and when Pag-IBIG is the better fit.

BiliranLeyte
Solar Leyte title card: Best tilt and direction for solar panels in Leyte and Biliran. 10 to 12 degrees facing south is the best fixed angle in Naval, Tacloban and Ormoc according to PVGIS 5.3; east-facing roofs lose 2 to 4 percent and steep north-facing roofs up to about 20 percent.
15 min

Best Tilt and Direction for Solar Panels in Leyte and Biliran: PVGIS Numbers for Flat, East-West and North-Facing Roofs

We ran the European Commission's PVGIS model for Naval, Tacloban and Ormoc at every tilt from flat to 35° and eight roof directions. The best angle is only about 10–12°, facing south (a little east of south). A flat or east-facing roof loses just 1–4% a year, a west roof 3–6%, but a steep north-facing roof can lose up to about 20%, and half its output in December. Tables, three worked examples and what to ask your installer.

BiliranLeyte
Solar Leyte title card: Lifeline rate and senior citizen electricity discounts 2026. 100 percent off most charges for qualified 4Ps and low-income households using 0 to 50 kWh a month, under the ERC's January 2026 uniform threshold; seniors get 5 percent in months of 100 kWh or less.
13 min

Lifeline Rate and Senior Citizen Electricity Discounts (2026): Who Qualifies and How to Apply at BILECO and LEYECO

Two electricity discounts are written into Philippine law. The lifeline rate gives qualified 4Ps and low-income households a 100% discount on most bill charges if they use 50 kWh or less a month, and since 2026 most 4Ps homes are enrolled automatically. The senior citizen discount takes 5% off main charges for a senior whose meter is in their own name, in months when the household uses 100 kWh or less. Here are the rules, the papers to bring to BILECO or your LEYECO co-op, and worked examples at September 2026 rates.

BILECOBiliran
Solar Leyte title card: Solar attic fans in the Philippines. About 6 percent air-conditioning cut in the Florida Solar Energy Center case study of two solar attic fans; attic air much cooler, bill savings modest. Solar Hub PH prices from ₱10,800 on 16 October 2026.
13 min

Solar Attic Fans and Roof Ventilators in the Philippines: Prices, Real Cooling Effect and Typhoon Fit

On 16 October 2026, Philippine sellers listed solar roof and wall ventilators from about ₱10,800 (Solar Hub 30 W wall) to ₱23,800 (Kool Vents 40 W). A Florida Solar Energy Center case study found two solar attic fans cut peak attic heat by over 20°F and air-con use by about 6% — useful, but not a huge bill cut. For Leyte and Biliran metal roofs and typhoon season, the bigger questions are roof sealing and whether insulation or a radiant barrier would do more. Prices, research and install notes below.

BiliranBrownouts
Solar Leyte title card: Do you pay tax on solar panels in the Philippines? 10.7 percent is the VAT share of a VAT-inclusive solar price at 12 percent VAT; buyers who aren't VAT-registered may claim it back as an income tax credit under BIR RR No. 7-2022.
13 min

Do You Pay Tax on Solar Panels in the Philippines? VAT, Real Property Tax and What RA 9513 Really Gives Homeowners

Yes, you usually pay 12% VAT when you buy solar panels from a VAT-registered seller. A 2022 BIR regulation says a buyer who isn't VAT-registered can claim that VAT back as a credit against the same year's income tax. Your town or province may also put the system on a tax declaration for real property tax. The big RA 9513 incentives (tax holidays, 0% VAT, special realty rates) are for DOE-registered RE developers, not ordinary homeowners. Here are the laws, a worked example and who to ask in Biliran and Leyte.

BiliranLeyte

Free quote · Leyte & Biliran

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