Getting a solar quotation but not sure what everything means? Here's a plain-language breakdown of every component on a typical Philippine solar BOM (Bill of Materials).
Listed by: brand, model, wattage, quantity, and price per panel.
What to check: Is the wattage STC-rated? (All proper specs are STC). Is the brand Tier-1? Does the warranty cover 25 years product + 30 years performance?
Example: JA Solar DeepBlue 4.0 550W × 10 panels = 5,500 Wp ≈ 5.5 kW system
Listed by: brand, model, rated output power (kW), and price.
What to check: Is the output kW matched to your panel total Wp? (inverter output should be 80-110% of panel Wp). Hybrid or grid-tied? How many MPPTs?
Listed by: brand, model, voltage, capacity in kWh or Ah, and price.
What to check: Is it LiFePO4 (lithium iron phosphate) — the safest lithium chemistry? What is the usable capacity vs. rated capacity? Depth of Discharge (DoD) should be 80-90%.
Listed by: rail type (aluminum profile), roof hook or L-foot type, clamps.
What to check: Is it aluminum (rust-proof) or galvanized steel? Is the hardware rated for your roof type (clay tile, metal corrugated, concrete)?
Listed by: cable size (4mm² or 6mm²), length in meters, MC4 connector pairs.
What to check: DC cables should be solar-rated, UV resistant, double-insulated (TUV/UL certified). MC4 connectors should be from Staubli or compatible brand — not cheap knockoffs.
Listed by: THHN/THWN cable size and length, conduit (flexible or rigid), distribution board.
What to check: AC cable size should match the inverter output current. Conduit should be used for all exposed runs.
These should appear on every proper quotation:
Should include: installation labor, commissioning and testing, permit assistance, net metering application assistance.
What to check: Is travel cost included? Is there a post-installation warranty on workmanship (at least 1 year)?
| Item | Spec | Qty | Unit Price | Total |
|---|---|---|---|---|
| JA Solar 550W Panel | 550W PERC Mono | 10 | ₱6,250 | ₱62,500 |
| Deye Hybrid Inverter | 5kW, 2 MPPT | 1 | ₱35,000 | ₱35,000 |
| Pylontech US5000C | 4.8 kWh LiFePO4 | 1 | ₱62,500 | ₱62,500 |
| Aluminum Mounting | Rooftop kit | 1 set | ₱18,000 | ₱18,000 |
| DC/AC Wiring | 4mm², 6mm² solar cable | 1 lot | ₱12,000 | ₱12,000 |
| Protection Devices | SPD, breakers, enclosure | 1 set | ₱8,500 | ₱8,500 |
| Labor & Commission | Installation + testing | 1 | ₱25,000 | ₱25,000 |
| TOTAL | ₱223,500 | |||
Red flag: A quotation that only lists "5kW solar system — ₱280,000" with no itemization. You have no idea what you're getting.
Generate your own professional BOM for free using our Solar Quotation Tool. Use it to verify and compare quotes from installers line by line.
Engr. Jason Morales — Founder, SolarEnergyPH