NTM SMART CONSTRUCTION & TECHNOLOGY INTEGRATION
Building Smarter.
Building the Future.
Digital construction, AI-enabled analysis, automation, secure systems and integrated technology solutions that improve project visibility, efficiency and long-term performance.
Smart construction & technology integration
A smart home is only as reliable as its power.
NTM designs smart technology into the structure — cabling, conduit and panel positions fixed at drawing stage — and runs the critical parts of it off solar. So when the grid drops, your cameras, gate, lighting and internet don't drop with it.
- Load audit — every device, in watt-hours
- Solar array and battery sizing
- Cable routes fixed before plaster
- Surge protection and earthing
- Handover, training and support plan
The difference, measured in hours
What happens in your house when the power cuts
Two identical homes, same devices, same night. One draws everything from the grid. The other runs its critical circuits off a solar and battery core. This is the sequence.
Smart devices, mains power
Supply cuts. Lights, sockets and air conditioning stop instantly.
Router and fibre terminal lose power. Remote access to the house ends. The app shows the last known state and nothing more.
Cameras and recorder go dark. No footage is captured for the duration of the outage — precisely the window when the property is most exposed.
Electric gate has to be released and pushed by hand. Anyone arriving finds it open or has to leave it open.
Freezer contents at risk. Borehole pump idle, so the tank does not refill.
The surge on restoration is the real damage. Recorders, routers and control boards fail more often at the moment power comes back than during the cut itself.
Same devices, solar and battery
Grid input drops. The hybrid inverter transfers to battery. Nothing on the critical circuit notices.
Router, camera recorder and hub sit on a low-voltage bus fed straight from the battery. The house stays online and reachable from your phone.
Cameras keep recording. Motion alerts still reach you. Security floodlights still trigger.
Gate motor runs off the same core. It opens and closes normally, and stays locked when it should be.
Sunrise. The array starts recharging the bank while the house is still running from it.
The inverter absorbs the surge, not your equipment. Grid power is treated as one input among several, filtered before it reaches anything sensitive.
Designing for where we actually build
Why imported smart-home kit disappoints here
Most smart products are engineered for a stable 230V supply, dry air and permanent broadband. Cameroon offers none of those guarantees. Specifying around that gap is most of the job.
Interrupted supply
Load shedding and unplanned outages are routine in most towns, and worst in the dry season when hydro output falls and demand for cooling peaks.
Our response: critical loads are separated onto a solar and battery circuit at design stage, not bridged with an extension lead afterwards.
Unstable voltage
Sags, spikes and switching surges quietly destroy electronics. Recorders, routers and control boards usually die at the moment supply returns.
Our response: surge arrestors at the board, a proper earth electrode, and sensitive equipment fed through the inverter rather than raw mains.
Humidity, heat and dust
Coastal humidity corrodes contacts and connectors. Harmattan dust in the north coats panels and blocks vents. Both shorten equipment life sharply.
Our response: sealed enclosures rated for outdoor use, ventilated equipment cabinets, and a cleaning schedule written into the handover pack.
Patchy connectivity
Systems that only work while the internet is up fail exactly when you need them. Fibre and mobile data both drop, and often together with power.
Our response: local-first control, so automation and recording continue offline. Remote access is a convenience layer, never the dependency.
Theft and tampering
Panels, batteries, cabling and external cameras are all resale targets. Poorly mounted equipment becomes a liability rather than a protection.
Our response: security fixings and anti-theft mounting, batteries housed inside a locked plant space, and camera runs concealed in conduit.
No local support
Grey-market kit arrives with no warranty path, no spares and firmware written for another market. When it fails, nobody can service it.
Our response: equipment chosen for parts availability and serviceability in-country, with documentation and training handed to you.
The kit, up close
The devices we install
Every component below is specified for Cameroonian conditions — outdoor-rated where it needs to be, low-voltage where that keeps it alive during an outage, and serviceable with parts you can actually source in-country.
Solar panel array
Roof or ground-mounted, angled for both yield and rain runoff. Fitted with security bolts and anti-theft mounting.
Hybrid inverter and battery
Accepts solar, battery, grid and generator, switching automatically. Lithium iron phosphate tolerates this climate far better than lead-acid.
PoE camera and recorder
Data and power over a single cable, recording locally so footage survives an internet drop. Runs straight off the battery bus.
Biometric lock and keypad
Fingerprint or code entry with time-limited codes for staff and visitors. Revoke access instantly — no key to chase down.
Automation hub and app
One local hub holding the logic, one app for lighting, climate, cameras and gate. Automation keeps running with the internet down.
Inverter air conditioning
Variable-speed compressors draw a fraction of the current of older fixed-speed units — which is what makes solar-assisted cooling realistic.
Motion security floodlight
Removes the cover intrusion depends on. LED draw is low enough to sit on the protected circuit without straining the battery.
Tank level sensor and pump control
Automatic pump start, low-level alerts to your phone, and leak detection. You stop discovering an empty tank at the worst moment.
What goes into the building
The smart technologies we install, and what each one is for
Not every system suits every project. These are the components we specify from, each judged on what it actually changes for a household in Douala, Yaoundé, Bamenda or Garoua — not on the brochure.
Solar array, hybrid inverter and battery
Panels, an MPPT charge controller, a lithium iron phosphate bank and a hybrid inverter that accepts solar, battery, grid and generator, and switches between them automatically.
Why it matters hereThis is the foundation the rest of the page depends on. Every other system below is only as available as the power behind it.
IP cameras and network recorder
Power-over-Ethernet cameras on a single cable for data and power, recording locally to a network video recorder with motion detection and mobile playback.
Why it matters hereLocal recording means footage survives an internet outage. PoE means the whole camera network can run from one protected low-voltage source.
Gate automation, smart locks and intercom
Automated sliding or swing gates, biometric or code entry at the main door, video intercom, and time-limited access codes for staff and visitors.
Why it matters hereYou can let a delivery or a relative in from anywhere, and revoke a code the moment someone leaves your employment — no key to recover.
Motion floodlights, alarms and sensors
Fence-line detection, motion-triggered LED floodlighting, door and window contacts, glass-break sensors, sirens and panic buttons tied into one alarm panel.
Why it matters hereDetection at the boundary buys time. A lit compound with an audible siren deters most opportunistic intrusion before it reaches the building.
Intelligent LED lighting and scenes
Efficient LED throughout, zoned switching, dimming, occupancy sensing in circulation areas, and away-mode patterns that make an empty house look occupied.
Why it matters hereLighting is the cheapest load to move onto solar, and the one that most changes how a house feels during an outage.
Centralised and inverter air conditioning
Zoned cooling sized to the building rather than the room, inverter-driven compressors, programmable set points, and ceiling-fan integration to reduce cooling demand.
Why it matters hereInverter units draw a fraction of the current of older fixed-speed units, which is what makes any solar-assisted cooling realistic at all.
Pump automation, tank levels and leak detection
Automatic borehole or booster pump control, tank level sensors with low-level alerts, leak detection on wet areas, and rainwater harvesting where the roof and site allow.
Why it matters hereWater supply is as intermittent as power in many neighbourhoods. Automated storage management means you rarely discover an empty tank at the worst moment.
Automation hub and mobile app
One local hub that holds the automation logic, with a single app for lighting, climate, cameras, gate and energy — instead of six apps that don't talk to each other.
Why it matters hereEspecially valuable for owners abroad: you can see and control the property in real time, and give a caretaker limited access without handing over everything.
IoT sensors for building health
Moisture and leak sensors in slabs and wet areas, temperature and humidity logging, energy metering per circuit, and structural movement sensors on larger structures.
Why it matters hereHeavy rainfall makes water ingress the most common cause of avoidable damage. Catching it as a sensor alert costs far less than catching it as a stain.
Smoke, gas and fire detection
Interlinked smoke alarms, LPG leak detection at the kitchen, and heat detection in plant and generator spaces, all reporting to the same hub and to your phone.
Why it matters hereBottled gas is standard in most kitchens, and emergency response times vary widely. Early detection is the part you control.
Structured cabling and failover internet
Cat6 to every room and camera position, a central patch and equipment cabinet, fibre as primary connection with automatic failover to mobile data.
Why it matters hereCabling is the one element that genuinely cannot be retrofitted cheaply. Running it during construction costs a fraction of chasing walls later.
Energy-efficient materials
Insulated roofing and wall panels, low-emissivity glazing, cross-ventilation designed into the plan, shading on the western elevation, and reflective roof finishes.
Why it matters hereEvery watt of cooling you design out is a watt you never have to generate. The envelope is the cheapest energy system in the building.
Securing the home
Five layers, working inward
Security is not a camera. It is a sequence of layers, each buying time for the next, with power and network treated as part of the system rather than an afterthought.
Stop it at the fence line
Detection and deterrence before anyone reaches the building. Motion-triggered floodlighting removes the cover intrusion depends on, and boundary detection gives you warning rather than evidence.
Fence sensors · motion floodlights · boundary cameras · automated gate · intercom at the entrance
Harden every opening
Doors and windows monitored individually, so the alarm panel knows precisely which opening was breached and reports it that way — not as a generic alert you learn to ignore.
Door and window contacts · glass-break sensors · smart locks · video doorbell · security grilles
Cover the inside, quietly
Internal detection for the case where the outer layers are bypassed, with panic buttons in the bedrooms and a siren loud enough to matter to the neighbours.
Interior motion sensors · panic buttons · internal siren · safe-room door hardware
Secure the system itself
An unsecured camera network is an open window. Cameras sit on their own isolated network segment, default passwords are replaced at commissioning, firmware is kept current, and remote access is encrypted.
Network segmentation · unique credentials per device · firmware policy · encrypted remote access · local-only recording option
Keep all four layers alive
The layer most often forgotten, and the one that decides whether the other four exist during an outage. Every security component sits on the protected solar circuit, sized to run through the longest outage the area realistically sees.
Battery-backed security circuit · low-voltage camera bus · surge protection · tamper-resistant equipment housing
The core argument
Replacing grid-dependent smart technology with solar-native smart technology
Almost every smart product on the market assumes a wall socket that is always live. In Cameroon that assumption is the single biggest cause of disappointment — the technology is fine, the supply behind it is not.
The fix is not a bigger generator. It is to design the system so the parts that matter never depended on the grid in the first place.
How the power actually flows
Solar array
Roof or ground-mounted panels, oriented and tilted for the site. Tilt also matters for rain runoff, which does much of the cleaning in the south.
MPPT controller
Extracts the most usable power from the array across changing cloud cover, and charges the battery correctly to protect its lifespan.
Lithium battery bank
The buffer that carries the house through the night and through outages. Sized from your measured load, not from a round number.
Two output paths
A low-voltage bus feeding security and network gear directly, plus a hybrid inverter producing mains-standard power for everything else.
Grid and generator connect as inputs to the hybrid inverter, not as the primary supply. The house runs from solar and battery by default and draws from the grid only to top up. That inversion — grid as backup rather than backbone — is the whole design principle.
Why the low-voltage path matters more than it sounds
Cameras, routers, network recorders, alarm panels and automation hubs are all natively low-voltage devices. On a conventional installation, battery power is converted up to 230V by the inverter, then converted straight back down by each device's own adaptor. Two conversions, two sets of losses, and a dependency on the inverter staying awake all night to run a handful of small devices.
| Device | Native supply | Runs direct from battery bus | What that changes |
|---|---|---|---|
| PoE security cameras | Low voltage | Yes | Recording continues even with the inverter idle |
| Network video recorder | Low voltage | Yes | Footage is never interrupted by a supply gap |
| Router and fibre terminal | Low voltage | Yes | House stays reachable remotely throughout |
| Automation hub, alarm panel | Low voltage | Yes | Automation and alerts keep running |
| LED lighting | Either | Yes | Lighting circuits can be specified low-voltage from the outset |
| Gate motor | Low voltage | Yes | Gate operates normally during an outage |
| Ceiling fans | Either | Yes | DC fans draw a fraction of conventional fans |
| Refrigeration | Mains | Via inverter | Works well on solar with an efficient inverter unit |
| Air conditioning | Mains | Via inverter | Feasible with inverter-type units and adequate array sizing |
| Water heater, iron, kettle | Mains | Poor fit | Pure heating loads — better served by solar thermal or grid timing |
The pattern is consistent: everything that makes a home smart and secure is naturally low-voltage and cheap to keep running. Everything expensive to run on solar is a heating or heavy motor load, which was never smart technology in the first place.
What it actually takes to keep the smart layer alive
Indicative daily consumption for a typical villa. Figures are realistic planning estimates for specification purposes — your actual numbers come from a metered survey of your own equipment.
| Tier | Typical loads | Indicative daily energy | Practical implication |
|---|---|---|---|
| Security & connectivity core | 4–6 cameras, recorder, router, hub, alarm panel, gate motor | Roughly 1.5–2.5 kWh | A modest array and battery keeps this running continuously, through the night and through multi-day outages |
| Essential living | Core above, plus full LED lighting, ceiling fans, efficient refrigerator, phone and laptop charging | Roughly 4–7 kWh | The realistic target for most households — comfortable, fully solar, no generator |
| Full comfort | Essential above, plus one or two inverter air conditioners and a borehole pump | Roughly 10–18 kWh | Achievable, but array and battery cost rise steeply — worth phasing over time |
| Heating loads | Electric water heater, iron, kettle, electric cooker | Highly variable, often very large | Poor candidates for battery power — better addressed with solar water heating, gas, or scheduling to grid hours |
| The security tier is the point. Protecting your home around the clock costs remarkably little energy — it is cooling and heating that make solar expensive, not the smart technology. | |||
Sizing changes significantly across the country
Cameroon spans several climate zones, and solar yield differs sharply between them. A system sized for Garoua will underperform badly in Douala. We size for the worst month of the year, not the annual average — a system that only works in the dry season is not a system.
| Region | Typical conditions | Design consideration |
|---|---|---|
| Far North & North Maroua, Garoua |
Strong, consistent sunshine; long dry season; heavy harmattan dust | Highest yield per panel in the country. Dust accumulation is the main loss factor, so cleaning access and schedule matter more than extra capacity |
| Adamawa & Centre Ngaoundéré, Yaoundé |
Good year-round sun with a defined wet season | Balanced conditions. Moderate oversizing plus a battery sized for consecutive overcast days covers the wet months comfortably |
| West & North-West Bafoussam, Bamenda |
Highland cloud and mist; cooler temperatures | Cloud cover reduces yield, but cooler panels run more efficiently and cooling demand is far lower — which reduces the load you need to serve |
| Littoral & South-West Douala, Limbe, Kribi |
Very high rainfall and extended cloud cover, particularly mid-year | The most demanding zone. Expect meaningfully lower yield than the north and size the array and battery against the wettest months, not the annual mean |
| Site conditions matter as much as region — roof orientation, tree shade, neighbouring buildings and dust exposure all change the outcome. We measure on site before specifying anything. | ||
Honest limits
Solar handles this well
- Cameras, recorders, alarms and access control, continuously
- Networking and remote monitoring, including from abroad
- LED lighting throughout the property
- Fans, and efficient refrigeration
- Gate motors, pumps and other short-duty motors
- Inverter air conditioning, given adequate array and battery
- Absorbing grid surges before they reach your equipment
Where it needs help
- Electric water heating — use solar thermal or gas instead
- Electric cooking, irons and kettles — short but very heavy draws
- Older fixed-speed air conditioners with high startup current
- Consecutive heavily overcast days on an undersized battery
- Batteries are the cost driver, and are a replaceable item over time
- Panels need periodic cleaning — more often in the dusty north
- Shaded or poorly oriented roofs may need ground-mounted arrays
We would rather tell you a load is a poor fit for solar than sell you a battery bank that cannot carry it. Where a hybrid approach makes better sense — solar for the smart and security layer, grid or gas for heating — that is what we will specify.
Sequence matters
How the technology gets into the building
The single biggest cost difference between a good smart installation and an expensive one is when the decision is made. Cable in conduit before plastering costs a fraction of chasing finished walls afterwards — and looks considerably better.
Audit
We list every intended device and its consumption, and record your outage pattern and site conditions. This produces the number everything else is sized from.
Design
Cable routes, camera positions, panel locations, equipment cabinet and battery space are added to the drawings and the bill of quantities.
First fix
Conduit and cabling installed while walls are open. This is the irreversible step — miss it and every later addition means breaking finished surfaces.
Install
Array, battery, inverter and devices fitted, earthing and surge protection tested, credentials set, and every circuit verified under load.
Handover
You get as-built drawings, equipment documentation, a maintenance schedule, training for the household, and an agreed support arrangement.
Already building, or already built? Retrofitting is entirely possible — surface trunking, wireless sensors and solar-mounted cameras all avoid breaking walls. It simply costs more and constrains where things can go, so the earlier you involve us the better the result.
What you get out of it
The practical difference
01. Continuity
Security, lighting and connectivity carry on through outages rather than stopping with them.
02. Lower running cost
Less drawn from the grid, less spent on fuel, and far less equipment lost to voltage damage.
03. Remote oversight
See and control the property from anywhere — built for owners who are not always in the country.
04. Real evidence
Footage that exists when it matters, because the cameras were still powered during the incident.
05. Quieter, cooler homes
Efficient cooling and a better envelope, without a generator running under the bedroom window.
06. Higher asset value
Documented, serviceable systems that a future buyer or tenant can verify and maintain.
Elsewhere at NTM
Where this fits in a project
Consulting & advisory
Verify the land and test the budget before commissioning drawings or specifying systems.
Home plan & design
Where cable routes, panel positions and equipment spaces get fixed on the drawings.
Construction & building
Execution on site to the approved drawings, with the first-fix cabling done at the right moment.
Before you write to us
Questions we are asked most
Can solar really replace the grid entirely for a smart home?
For the smart and security layer, yes — comfortably. Cameras, recorders, networking, alarms, access control and lighting draw very little energy, and a modest system runs them continuously. Full independence including air conditioning and electric heating is technically possible but the cost climbs steeply, so most clients start with a solar-native security and lighting core and extend it in phases.
What happens on a long stretch of rainy, overcast days?
This is exactly what battery sizing is for. We design around consecutive low-yield days rather than average conditions, which matters most on the coast. The hybrid inverter can also top up from grid or generator when it is available, so the battery is never the only line of defence.
Do I still need a generator?
Many clients find they no longer run one day to day. We usually keep the generator connection in place as a third input for heavy or unusual loads, but the point of the design is that it stops being the thing you depend on every week.
Can this be added to a house that is already finished?
Yes. Solar, battery, cameras, alarms and access control all retrofit well. The harder part is concealed cabling — in a finished house that means surface trunking or wireless devices, which works but constrains placement. Retrofits typically cost more than the same work done at first-fix stage.
I live abroad. Can I monitor and manage the property remotely?
That is one of the strongest arguments for this approach. You get live camera views, motion alerts, gate control, energy monitoring and system health from your phone wherever you are — and because the core runs on solar, it does not go dark every time the local supply does. You can also grant a caretaker limited access without handing over full control.
Are the panels and batteries at risk of theft?
It is a real consideration and we design for it. Panels are fitted with security fixings and anti-theft mounting, batteries and inverters live inside a locked plant space rather than outdoors, cabling runs in conduit, and the cameras cover the array itself.
How long do the batteries last?
Battery lifespan depends on chemistry, depth of discharge, temperature and how well the system is sized. Lithium iron phosphate banks are the current standard for this climate because they tolerate heat better and cycle far more times than lead-acid. Batteries are a replaceable component with a finite service life, and we tell you the expected replacement window up front rather than leaving it as a surprise.
What does a system like this cost?
It depends almost entirely on the load you want to carry, which is why we start with an audit rather than a price list. A security and lighting core is an accessible investment for most households; full comfort including air conditioning is a much larger one. After the survey you get an itemised specification and a bill of quantities, so you can see exactly what each tier adds and phase the work if you prefer.
Start with the numbers
Every good system starts with a load audit.
Tell us where you are building, what you want to run, and how bad the supply is in your area. We will come back with a specification sized to that — not a package off a shelf.
- Phone
- 653 404 742
- Start a chat
- Office
- Carrefour BP Cite, Ndokoti, Douala
- Coverage
- Douala, Yaoundé and nationwide
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