Security Advice · CCTV
Do Solar Security Cameras Actually Work in NZ?
They arrive, they work, everyone is delighted. The question is never whether a solar camera works in January – it is what it is doing in its second July, and that is a different answer.
The short answer
- Solar cameras work well for the first summer and are usually still fine through the first winter.
- The problem is cumulative: the panel collects less each year while the battery holds less each year.
- It shows up in winter – least sun, longest nights, most infrared draw. The worst time to lose a camera.
- They are the right answer where there is genuinely no power: a rural gate, a paddock, a build in progress.
- For a house, getting power to the position usually costs less over five years than replacing cameras.
Why the first summer goes so well
Nothing here is a criticism of how a solar camera performs out of the box. Mount it in December, point it at the driveway, and it will do exactly what the box promised – it charges faster than it discharges, the battery sits at 100% all week, and the only maintenance is nothing at all.
That is a real result, and it is why these sell so well. It is also why the decline catches people out: there is no moment where the camera stops working. It gets slightly worse every month for two years, and the day you actually need footage is the day you find out what slightly worse adds up to.
What is actually degrading
The usual explanation – that the solar panel wears out – is the weakest version of the argument, and it is mostly wrong. A decent monocrystalline panel loses in the region of half a percent of its output a year. That is not what ends these cameras. Four other things do, and they compound.
1. The panel was sized with no margin
An all-in-one solar camera carries a panel roughly the size of a paperback. It is specified to break even on an average day, at an ideal angle, in clean air, with nothing shading it. There is no headroom in that number, so every real-world loss below comes straight off the top – and unlike a rooftop array, there is nothing in reserve to absorb it.
2. Soiling and shade, which matter more than they should
Pollen, dust, bird mess and – across most of Auckland – salt haze build a film on the laminate. Nobody cleans a camera panel three metres up a gable. Worse, these small panels wire their cells in series, so shading one corner does not cost you that corner’s share, it throttles the whole string. A branch that grew across the panel over a summer, or an eave shadow that only appears once the sun drops in April, can halve the day’s harvest without anything looking wrong.
3. The battery does a full cycle every single day
This is the big one. Small-format lithium cells of the type that fit inside a camera housing are commonly rated for a few hundred cycles before they are down to 80% of their original capacity. A security camera charges through the day and discharges through the night, which is one full cycle – so it spends 365 of them a year.
On that arithmetic a cell rated for 500 cycles reaches its 80% mark somewhere in year two, and falls away faster after that. Nothing has broken. The battery is doing what a daily-cycled battery does, and it was never going to do anything else.
4. Heat, which is the New Zealand-specific one
Lithium cells age roughly twice as fast for every 10 degrees hotter the cell runs. A sealed plastic housing in full Auckland summer sun, with a solar panel bonded to the same body soaking up heat all day, is not a gentle place to keep a battery. The irony is direct: the position that gives the panel the most sun is the position that cooks the cell fastest.
Further south the opposite problem appears. Lithium must not be charged below freezing – it plates the cell and does permanent damage. Good chargers refuse below zero, which costs you a frosty morning’s harvest. Cheaper ones charge anyway and quietly take capacity off the top. Auckland gets few frosts, so this is a Waikato, Central Plateau and South Island concern rather than ours.
Winter is when it shows, and winter is when you need it
Put those four together and you have a camera whose supply falls a little each year and whose storage falls a lot. Then apply the season. Auckland gets about nine hours and forty minutes of daylight at the June solstice against nearly fifteen in December, and that daylight arrives at a much lower angle through more cloud, so a fixed panel sees a fraction of its summer harvest.
At the same time the demand moves the other way:
- The nights are longer, so the infrared illuminator – the single biggest load on the camera – runs for fourteen hours instead of nine.
- Dark hours overlap with people being home and about, so there is more movement to detect, more recording and more uploading, in exactly the hours that cost the most power.
- Cold cells deliver less than the same cells at 20 degrees, so what capacity is left reads even lower than it is.
- Nothing recovers the following day, because that day is also short and grey. Deficits carry forward all week.
So the camera starts sleeping to protect itself. Clips get shorter, the wake-up gets lazier, and eventually it drops offline overnight and reappears mid-morning. The usual response is to turn the sensitivity down so it lasts the night, which works – by making the camera notice less. That is the point where it has stopped being a security camera and become a device that is technically still online.
The cruel part of the arithmetic: the busiest camera goes first. Every detection costs power, so the camera on the gate that sees the most traffic is the one working its battery hardest and ageing it fastest. The position you care most about is the position that fades soonest.
Where a solar camera is genuinely the right call
None of that means do not buy one. It means buy one for the job it is good at, which is anywhere running power is unreasonable or pointless. On those jobs it is not a compromise, it is the correct product:
- A rural gate, or the far end of a long driveway, where a trench is hundreds of metres and thousands of dollars.
- A site that is temporary by definition – a build in progress, a subdivision, plant left in a paddock for the duration of a job.
- Lifestyle-block positions: a woolshed, a water trough, a hive site, a boundary gate nobody drives past for a fortnight.
- Somewhere you want covered for a season and will take down again.
- A rental, where a permanent install is not yours to make. The same logic covers consumer battery cameras generally, and we go through that in which cameras are actually worth buying.
The honest framing for all of these is that the battery is a consumable, not a component. Budget to replace it every two to three years, the way you would a smoke alarm battery, and a solar camera on a remote gate will serve you for a decade.
What we would fit instead, by situation
| Situation | What we would do | Why |
|---|---|---|
| House, camera position under an eave | PoE, cable back to the recorder | One cable carries power and data. Nothing to charge, nothing that fades with the season |
| House, no realistic cable path | Run power only, fit a mains WiFi camera | Takes the battery out of the equation – the panel was never the point |
| Detached garage or sleepout | PoE, or a mains camera off the shed circuit | Almost always has power already, or is a short run from a board |
| Rural gate, no power within 100m | Solar, with a replaceable battery | The job solar is genuinely for. Treat the cell as a consumable |
| Build site, six to nine months | Solar, 4G model | Temporary by definition, and there is no recorder to cable back to yet |
| Rental property | Consumer battery or solar camera | No permanent install, and it moves with you |
The pattern in that table is that the fix is nearly always power, not data. People assume a camera position with no cable path needs a battery, when what it usually needs is a socket – and an electrician adding one outdoor circuit while already on site is a far smaller job than most people expect. We do the electrical work as well as the security work, so on our quotes that is the same visit. what CCTV costs installed covers where the money actually goes on a system.
If you are buying one anyway, buy it properly
Plenty of the solar cameras we get asked about are going onto jobs where they are the right answer. If that is you, four things separate the ones still working in year four from the ones in a drawer:
- A replaceable battery. Non-negotiable. If the cell is sealed in, the camera’s life is the cell’s life, and you already know roughly what that is.
- A separate panel on its own bracket, rather than bonded to the camera body. You can aim it north at a proper tilt, keep it clear of the eave shadow, wipe it down, and it is not heating the battery.
- Local recording to a card, not cloud-only. Cloud upload is a power cost on every event and a subscription on top – and it means an offline camera has recorded nothing at all. Same reasoning as how long footage actually lasts.
- Somewhere you can actually reach. You will be cleaning that panel and swapping that battery. If it needs a ladder and a second person, it will not happen.
Then set the expectation deliberately: a solar camera is an outpost, not coverage. It answers one question at one point. If you want a property covered – several angles, continuous recording, weeks of footage you can scrub back through – that is CCTV installation in Auckland, and it is a different class of system. how many cameras you need is the place to start on that, and wired versus wireless cameras covers why the cabled version keeps winning.
Common questions
Do solar security cameras work in winter in New Zealand?
For the first winter, usually yes. The trouble is cumulative – by the second or third winter the panel is dirtier and the battery holds less, while the nights are long and the infrared runs for fourteen hours. That combination is what puts them offline overnight.
How long does a solar camera battery last?
The cells used in camera housings are commonly rated a few hundred charge cycles to 80% capacity, and a solar camera does a full cycle every day. Two to three years before it is noticeably short is realistic, and sooner on a busy position or a hot wall.
Can I just add a bigger solar panel?
Often yes, and if the camera takes an external panel it is the best single upgrade – it fixes the supply side and lets you mount the panel where the sun actually is. It does nothing about the battery ageing, so it delays the problem rather than removing it.
Are solar cameras better than battery cameras?
A solar camera is a battery camera that recharges itself, so it inherits every battery limitation – the wake-up delay, the shorter clips, the cold-weather capacity drop. What it removes is you taking the camera down to charge it. That is a real convenience rather than a change in class.
Where should I point a solar camera panel in NZ?
North, tilted up at roughly the site’s latitude, with nothing shading it at any time of day in any season. Check it in winter rather than summer – an eave or fence shadow that clears the panel in January can sit across it all morning in June.
Do you install solar cameras?
On the jobs they suit – rural gates, long driveways, temporary sites – yes. On a house we will normally quote getting power to the position instead, because over five years that costs less than replacing cameras and it removes the failure mode altogether.
Not sure whether that position needs a battery or a cable?
We do the electrical work and the security work, so getting power to an awkward camera position is one job and one quote. Free site assessment.