Batteries dead in 18 months
1,500 cycles at 25 °C, half that at 35 °C — the temperature of a plant room in Cotonou. No spreadsheet computes this.
SolarVision X · Solar Engineering OS
Size it right, from the first panel to the last metre of cable.
Satellite worst month, battery life corrected for temperature (Arrhenius), cable sizes at 70 °C. A deterministic engine, not a spreadsheet.
3 free sizings•IEC 60364-7-712•Mobile Money UEMOA
SolarVision X Engine · Studio Live
v3.2 · Mode Déterministe Actif
Calcul Certifié
Station ClimatologiqueSource: PVGIS + NASA
Puissance Crête PV
12,65 kWc
23 modules 550 Wc · 0,0 % surdimensionnement forcé
Pire Mois (Août)
4,48 kWh/m²/j
Dimensionnement garanti toute l'année
Vie batterie à 36 °C (Local Cotonou)3,7 ans
Notice constructeur: 8 ans @ 25 °CArrhenius: -54% @ 36 °C
IEC 60364-7-712 · IEC 62548Worst-month resource : 4,48 kWh/m²/j
Quick estimate
Order of magnitude, on average irradiation
Total daily demand12 kWh / jour
2 kWh · maison25 kWh · clinique60 kWh · ferme
Battery autonomy2 jours
1 j2 j3 j4 j
Battery technology
Estimated result
Solar array
2.88 kWc
Battery bank
30 kWh
Suggested inverter
3.6 kVACreate the full project
These three figures are an estimate. Real sizing — worst month, battery ageing with temperature, cable sizes, protection, single-line diagram — requires an account. It stays free on screen; only the signed PDF report is paid (5 000 FCFA).
The problem
95 % of solar installations in West Africa are sized on a spreadsheet — or by gut feel.
Not for lack of skill: for lack of a tool that runs the code compliance checks.
Inverters that trip
A 180 W freezer draws 1,500 VA on start-up. Adding up nameplate watts does not protect against that.
Files rejected by lenders
A bank does not fund a spreadsheet quote — it funds a traceable file, referenced to IEC 60364-7-712, and verifiable.
The solution
An engineering engine that shows and proves its work.
Every result opens onto its formula, its values and the standard clause behind it. You no longer sign off a figure you cannot defend.
- Tilt optimised on the worst month — not on a misleading average.
- Open-circuit voltage at the site's minimum temperature (IEC 62548).
- Cable sizes taken as the worst of 3 criteria: voltage drop, current-carrying capacity at 70 °C, mechanical strength.
Excerpt from the technical reportCompliant with NF C 15-712
Battery-to-inverter cable size
50 mm²
dU = 2 x rho x L x I / S = 2 x 0,02063 x 2 m x 112 A / 50 = 0,18 V soit 0,39 % (limite 1 %) rho pris a 70 °C, temperature reelle d'un cable en goulotte sous toiture.
Standards referenced: NF C 15-100 § 525 · IEC 60364-5-52
Features
Everything a plain spreadsheet will never do.
Your site
Coordinates, solar resource, daily demand.
Sizing engine
Worst month, temperature, IEC/NF standards — a calculation, not a quote.
Signed PDF report
10 sections, HMAC-SHA256, verifiable online.
Diagrams & wiring
Single-line and multi-line diagrams generated, not drawn.
AI copilot
Knows the project, answers in context.
Separate load and surge analysis
Steady state and start-up surge computed separately: the inverter holds both.
Battery life corrected on site
Arrhenius correction at the room's temperature. The datasheet claims 8 years; we say 3.7.
Signed & verifiable report
PDF signed with HMAC-SHA256 plus a QR code, authenticable online by a third party.
Specialised AI copilot
An AI that knows your sizing and answers in context.
What can be verified
Nothing here asks you to take our word for it.
Every choice is sourced
IEC 60364-7-712, NF C 15-712-1, IEC 62548: the clause appears next to the result, not in an appendix.
Verifiable without trusting us
Every report carries a code and a QR, checkable on a public page.
Data from public sources
PVGIS (European Commission) and NASA POWER irradiation, at the site's coordinates. No in-house estimates.
Comparison
Why SolarVision X in the field.
PVsyst is a laboratory reference. SolarVision X aims for the same accuracy, usable on a phone at the job site.
| Technical criterion | SolarVision X | Spreadsheet | PVsyst |
|---|---|---|---|
| Works on phone & tablet | |||
| Sized on the worst month | |||
| Battery life corrected for temperature | |||
| Cable sizes & protection computed | |||
| Surge arrester based on local lightning density | |||
| Report signed and verifiable by a third party | |||
| Equipment catalogue & WAEMU Mobile Money |
Transparent pricing
Your first 3 complete sizings are free, for life. After that, you pay for the document, or for the tool.
Configure, compare, adjust: the first 3 complete results are free per account, for life, no card required. Beyond that, only two things are paid.
Standard
No commitment. You pay when you need the document, and not before.
5 000FCFAper sizing
3 000 FCFA for students, with code ETUDIANT.
- Sizings and on-screen results — 3 free per account, for life
- 10-section PDF report, ready to hand over
- System and single-line diagrams, priced bill of materials
- HMAC-SHA256 signature and public verification QR code
- Utility bill analysis — Entreprise Pro only
- Existing installation analysis — Entreprise Pro only
- Saving analyses — Entreprise Pro only
Recommended for installers
Entreprise Pro
For installers and engineering firms. Everything is unlimited, and both analysis modules open up.
30 00025 000FCFAper 30-day period · no automatic billing
Launch price with code LANCEMENT.
- Unlimited sizings and PDF reports
- Utility bill analysis
- Existing installation analysis
- Save and reopen your analyses
- Full price book and currency of your choice
- Public report verification
Payment by Mobile Money — Wave, Orange Money, MTN — or bank card. A subscription opens your access for 30 days then stops: no silent renewal, no dunning. An expired subscription never removes access to reports you already obtained. See full pricing details.
West Africa · WAEMU
Your next solar sizing deserves a file you can defend.
Create an account in 30 seconds, enter a real installation and compare the results with your spreadsheet. Sizing is free.