What are bonnet solar panels?

Bonnet solar panels are solar panels mounted on the bonnet (hood) of a 4×4 or off-road vehicle. They harness sunlight to generate power while driving or parked, helping to run accessories like fridges, lights, or charge batteries, without needing roof rack space or external panels.

Why choose bonnet panels over roof racks or canopy panels?

• Saves roof-rack or canopy space for gear or reducing aerodynamic drag

• Less exposed to damage (branches, low clearances)

• Integrated look and often easier wiring

• Can still be high output if matched well to vehicle bonnet shape and tilt

What types of vehicles are suitable for bonnet solar panels?

Most modern 4×4 utes, SUVs, and dual-cab trucks can accommodate bonnet panels, provided the bonnet is relatively flat or has a gentle curve. Panel shape and wattage will vary by make/model. We offer vehicle-specific panels for common rigs in NZ.

What materials and tech are used in Fourby’s bonnet panels?

Our panels use high efficiency, monocrystalline PERC solar cells, encased with durable tempered glass or ETFE (if offered), in a rugged, UV-resistant frame or flexible casing. Designed for heat, vibration, moisture, and off-road abuse.

How much power (watts) can I expect from a bonnet panel?

Depends on the panel size, mounting angle, sun exposure, and shading. As a ballpark: small bonnet panels might provide 60-80W, medium ones 100-120W, larger ones up to 150W+, under peak sun. In typical NZ conditions (sun angle, cloud cover), expect somewhat less.

Will bonnet solar panels interfere with bonnet access, airflow, or engine cooling?

When correctly sized and installed, bonnet panels are designed to minimise obstruction. We ensure vents, defrosters, or other hood features are not blocked. Good cabling routing and panel placement are critical. If in doubt, we review vehicle specifics.

How do bonnet panels perform when driving vs when parked?

While driving, the panel gets more airflow but angle to sun is sub-optimal; still generates useful power. When parked and oriented better (or during midday), performance improves. The panel works in both cases; for stationary use, performance is often better.

Can I install a bonnet solar panel myself, or do I need a professional?

Many people can do self-install if comfortable with wiring, mounting, and vehicle access. We supply templates, mounting hardware, wiring instructions. For those unsure, we recommend professional installation, especially where engine bay routing, battery safety, or waterproofing are concerned.

What electrical system do I need to pair with a bonnet panel?

At minimum:

• Solar charge controller (preferably MPPT)

• An auxiliary battery (lead acid or better, lithium)

• Proper fusing and isolation (to protect your starter battery)

• Wiring rated for current load

Can bonnet panels help maintain or charge a lithium battery?

Yes. A correctly sized panel plus controller can supply charge to a lithium battery. Because lithium batteries have more flexible charge profiles, matching controller output and ensuring safe charging (temperature, voltage) is key.

How do bonnet panels stand up to NZ’s weather (rain, snow, UV)?

Our panels are sealed weatherproof, UV resistant, and built for harsh conditions. ETFE surfaces (if included) resist dirt, minimise discoloration, and tolerate heat. Frames and fixings are corrosion resistant (stainless bolts, aluminium frames, etc.).

What about vibration, wind, or off-road impacts?

The panels are designed to handle vibration and off-road use. Mounts and adhesives are heavy-duty, but it’s important to use the correct installation method and check the system periodically.

What warranty is offered?

Panels are backed by a warranty covering materials, workmanship, and long-term output performance. Details vary by product, but typically include multi-year coverage and an output guarantee.

How do I maximise the efficiency of bonnet solar panels?

Keep panels clean, park in sunny spots, use an MPPT controller, minimise shading, and ensure wiring is secure and corrosion-free.

What happens if part of the panel is shaded?

Shading reduces output, but panels with bypass diodes allow some cells to keep working even if others are shaded. This helps maintain performance in real-world conditions.

Are there any legal or safety issues in New Zealand with bonnet solar panels?

There are generally no restrictions, but wiring should comply with NZ automotive standards and installations must not obstruct visibility or bonnet vents.

Do bonnet panels affect vehicle paint or bonnet materials?

With proper installation, including protective gaskets and non-abrasive fixings, there is minimal risk of damage.

How do bonnet panels compare to portable solar blankets or roof-mounted panels?

They are more durable and weather resistant than blankets, and don’t take up roof space like traditional panels. Roof panels can provide higher wattage, but bonnet panels balance power with practicality and vehicle clearance.

What size panel do I need for a fridge or camping setup?

A 100–150W panel is generally enough for a 12V fridge and light charging needs. Larger systems may be needed for long stays or higher-draw devices.

Where can I buy bonnet solar panels in New Zealand?

Fourby offers vehicle-specific bonnet solar panels and complete kits shipped NZ-wide, with support for both DIY and professional installations.