Lagos solar is broken. NEPA is unreliable, diesel costs ₦1,500/litre, and every other rooftop has a salesman on it. Demand is up, real engineering capacity is down — and almost every quote landing in your inbox contains at least one of the six lies below.
I'm an engineer at PhotoSynergy Technology. We don't sell solar panels. We engineer, install, and audit them — which means we see what real systems cost, and we see the patterns when a quote is written to close a sale instead of to power a building. This is what we look for first.
Lie 1: "These are Tier-1 panels"
Every quote says Tier-1. It is the most over-used phrase in the Lagos solar market. The problem: Tier-1 is not a quality rating. It is BNEF's financial classification — it means the manufacturer is bankable, nothing about whether the panel survives Lagos heat for ten years.
How to spot it: ask the seller for the BNEF Tier-1 list URL and the panel's IEC 61215 + IEC 61730 certification numbers. A real Tier-1 panel comes with a downloadable IEC certificate from the manufacturer's portal. If the seller cannot produce both within a day, the "Tier-1" claim is decoration.
Lie 2: "5kVA inverter handles everything in your home"
An inverter rated in kVA without context is a red flag. Inverters have two ratings that matter: continuous output (kW, sustained) and surge rating (kW, for 3–5 seconds when a motor starts). Your fridge, freezer, AC compressor, and water pump pull 3–5× their running wattage in the first instant they switch on. A 5kVA inverter with a weak surge rating will trip every time the AC compressor cycles.
How to spot it: demand the manufacturer's spec sheet PDF. Look for "continuous AC output" and "surge rating" as separate numbers. If the seller only shows you the kVA model name, they're hoping you don't ask.
Not sure what your loads actually pull? The free Lagos Solar Buyer's Course includes a sizing calculator that walks you through every appliance — appliance by appliance, surge included.
Lie 3: "Lithium batteries last forever"
They don't. Lithium chemistry is better than lead-acid for solar, but "lithium" is not one thing. LiFePO4 (lithium iron phosphate) is what you want for a solar system in Lagos: stable at high temperature, 3,000–6,000 cycles, safer if punctured. Li-NMC (the other common lithium chemistry) packs more energy per kg but degrades faster in heat and has a fire profile that does not belong on a Lagos rooftop.
Even with the right chemistry, cycle life depends on three things: depth-of-discharge (running a battery to empty halves its life), operating temperature (every 10°C above 25°C cuts life by roughly half), and the BMS (battery management system — protects against over-charge, over-discharge, and cell imbalance).
How to spot it: ask three questions in writing. (1) Exact chemistry — LiFePO4 or Li-NMC? (2) Cycle life at 80% depth-of-discharge? (3) BMS make and model? If the answer to any is "lithium is lithium," walk away.
Lie 4: "Installation is included free"
Nothing is included free. Real installation labor for a 5kVA residential system runs ₦200,000 to ₦500,000 depending on roof, cable run, mounting structure, and earthing requirements. When the quote says "free installation," that labor has been folded into the panel and inverter prices — usually with 30–50% padding.
The reason this matters is not whether the install is "free." The reason is that without an itemized quote you cannot compare two sellers fairly. Seller A quoting ₦4.2M with "free install" and Seller B quoting ₦3.4M + ₦400k labor are not actually different prices — but they look very different on paper, and the second is honest about what you're paying for.
How to spot it: insist on an itemized bill of materials (BOM). Panels, inverter, batteries, balance-of-system (cables, breakers, mounting, earthing), and installation labor — each as a separate line. Any seller who refuses is hiding margin somewhere you cannot see.
Lie 5: "Free site survey, no obligation"
A real site survey takes four to six hours. The engineer measures your roof orientation and shading, audits your existing electrical panel and earthing, profiles your load over a 24-hour cycle, and inspects the cable route from roof to inverter to battery bank. That is between ₦20,000 and ₦50,000 of engineering labor.
If somebody offers it free, what you get is a 15-minute drop-in by a salesperson trying to close. They will eyeball your roof, write you a quote based on a guess, and the guess will be optimistic in the seller's favor.
This is the lie that hurts the most because it sets up every lie above it. A real survey catches the wrong inverter sizing, the wrong battery chemistry, the bad mounting plan — before you sign anything. A free "survey" catches none of them.
We charge ₦25,000 for a proper Lagos site survey, fully refunded if you install with us. If you install with someone else, you keep the survey report and walk into their quote knowing what your building actually needs. Book a real site survey →
Lie 6: "2-year warranty covers everything"
"Warranty" on a solar system is not one document. It is at least three:
- Panel manufacturer warranty — typically 10–12 years on workmanship + 25 years on power output. Honored by the panel brand, not the installer.
- Inverter manufacturer warranty — typically 5–10 years. Honored by the inverter brand.
- Installer workmanship warranty — typically 1–5 years on the install itself (cabling, mounting, connections). Honored only by the installer.
The trap: the installer often disappears within two or three years. The panels and inverters stay. So if your installer's workmanship warranty was the only thing covering your wiring, and the installer is gone, you have a working panel above a roof that's slowly burning through bad terminations.
How to spot it: demand each of the three warranty documents in writing, separately, with the warranty issuer named on each. Then verify the installer's CAC registration (corporateaffairscommission.gov.ng) and ask how long they've operated. A two-year-old company offering a five-year workmanship warranty is making a promise they may not be around to keep.
What to do instead
None of this means solar is a bad investment for Lagos — it is one of the best engineering decisions a home or business owner can make in 2026, especially with diesel where it is. But you have to buy it like an engineer, not like a customer.
- Get at least three quotes. If they are not itemized, send them back.
- Walk into every survey with our 12-point hand-over checklist — it lists what a real installer must demonstrate before you sign off on the system. Download the checklist (PDF, free).
- Take 30 minutes and go through the free Lagos Solar Buyer's Course — seven lessons, no sign-up to start, no panel brand pays us a commission.
- If you want a real engineering survey before you commit, book the ₦25,000 site survey. We refund it on install.
PhotoSynergy Technology does not sell solar panels. We engineer, install, and audit complete solar systems for Lagos homes and businesses. That difference is the whole point of this post: when you read a quote from a panel reseller and a quote from an engineering firm, the incentives are not the same. Now you know what to look for.