Collection: 400W Solar Panels Australia

Compare 400W solar panels in Australia for caravans, RVs, 4WDs, camping and off-grid battery systems. This is StarPower’s main 400W range, bringing fixed, TOPCon, shingled, bifacial, flexible and portable options together so you can choose by installation type, dimensions and electrical specifications.

A 400W-class panel can offer a practical balance between panel footprint and charging capacity. The right choice depends on the available mounting area, roof loading, battery capacity, controller limits and whether the panel will be permanently mounted or deployed at camp.

Compare 400W Solar Panel Types

Fixed framed panels: suitable for permanent caravan, RV, shed, cabin and ground-mount installations where structural support and rear airflow can be provided.
TOPCon panels: a fixed monocrystalline option using TOPCon cell construction; compare the exact voltage, current and dimensions with the rest of the range.
Shingled and half-cut panels: use alternative cell layouts designed to manage current paths and active panel area. Product specifications vary, so compare each model directly.
Bifacial panels: can collect light at the rear as well as the front, but rear-side contribution depends on mounting clearance and reflected light.
Flexible panels: prioritise low weight and profile for compatible surfaces where the permitted bend and mounting requirements can be followed.
Folding panels and blankets: provide portable solar that can be positioned in sunlight while the caravan or vehicle remains shaded.

For permanent mounting, browse the focused 400W fixed solar panel range. For portable charging, compare 400W solar blankets. Lightweight roof options are also available in the wider flexible solar panel range.

Popular 400W Fixed Panels

Compare the 400W TOPCon fixed solar panel, the 400W StarPower monocrystalline fixed panel and the 400W fixed shingled panel. Check the individual dimensions, weight, Voc, Isc, Vmp and Imp because panels with the same rated wattage can require different mounting space and controller capacity.

Is 400W Enough for a Caravan?

That depends on daily energy use, battery capacity, location, season and charging losses. List the watt-hours used by the fridge, lighting, pumps, fans, communications, device charging and inverter loads. A 400W panel can support many touring systems, but higher consumption or poor solar conditions may require additional panel and battery capacity.

If you are comparing adjacent sizes, see the 300W solar panel range and 500W solar panels.

Controller and Battery Compatibility

Check the panel’s open-circuit voltage and short-circuit current against the controller’s PV input limits. For multiple panels, series wiring increases array voltage and parallel wiring increases array current, so calculate the complete array rather than relying on one panel’s rating.

The controller’s charging profile must also suit the battery chemistry. Compare MPPT solar charge controllers and lithium batteries, or contact StarPower before ordering if you need help checking electrical compatibility.

Before You Buy

Measure the complete mounting area and allow for brackets, airflow and cable access.
Check panel weight against the roof structure and vehicle payload.
Verify Voc, Isc, Vmp and Imp against the controller or inverter limits.
Confirm whether the listing is panel-only or includes a regulator, leads, stands or mounting hardware.
Plan correctly rated cable, connectors, fuses and isolation.
Use qualified installation assistance where required.

400W Solar Panel FAQs

Can a 400W panel charge a lithium battery?

Yes, when connected through a compatible controller with the correct lithium charging profile and sufficient PV voltage and current capacity.

Does a 400W panel always produce 400W?

No. Rated wattage is measured under standard test conditions. Heat, shade, angle, weather, dirt, cabling and controller losses affect real-world output.

Should I choose fixed, flexible or portable?

Choose fixed for permanent mounting and conventional brackets, flexible where low weight or profile is important on a suitable surface, and portable when you need to move the panel into sunlight at camp.