Sunpro Power 440W TOPCon Bifacial Solar Panel – SPDG440-N108M
36x ZnShine 440W Bifacial Solar Panel 108-Cell N-Type Monocrystalline | ZXM7-UHLDD108-440
Hyundai 440W Bifacial Solar Panel | Black On Black N-Type TOPCon | HiN-T440NF(BK)
JA Solar 440W Bifacial PV Module 1200mm | JAM54D41-110
Shop the Premier Selection of 400 Watt Solar Panels For Sale Online
Your search for 400W solar panels for sale ends here at The Solar Store, where you’ll discover the best selection from the most trusted brands in the entire industry - ZnShine, Hyundai, Philadelphia Solar, and JA Solar. All backed by 25-30 year warranties.
All the solar panels for sale on this page use N-type monocrystalline cells with bifacial construction. They’re capable of generating power from both sides to maximize the return from your investment.
You can’t beat the efficiency of monocrystalline solar panels, ranging from 22.54% to 23.02%. You’re also getting the best value for your money with prices starting at only $167 per panel, with hassle-free financing available.
Whether you’re building an off-grid solar system or trying to replace the panels on your roof, get in touch with our team for one-on-one support choosing the right 400 watt solar panel for your project.
Frequently asked questions
How much power will a 400 watt solar panel produce?
You should get 1.6-2.0kWh per panel (assuming 4-5 hours of peak sun). Bifacial panels maximize efficiency because they pull in light from the back side as well. It also depends on your mounting surface, though.
How do I know if this is the right solar panel wattage?
This is the sweet spot for most homeowners. However, a 300 watt solar panel might be a better fit for a shed or RV. On the other end of the spectrum, you may need a 500 watt solar panel array if you want fewer panels overall to complete your project. We have all the different wattages in store for you at The Solar Store and can guide you towards the optimal fit.
How many batteries do I need for 400 watts of solar?
Let’s work through it together - one panel can produce around 2,000 Wh per day (at 5 hours of peak sun). A 100Ah 12V LiFePO4 battery stores about 1,200 Wh of usable energy. One battery is enough for a lighter load, but you may want to double with a second battery to fully capture all the energy your panels produce.
How much do 400 watt solar panels cost?
Prices start at only $167 here at The Solar Store, but the more premium 400 watt solar panel models in our lineup cost over $212. There’s something for your budget here in this collection. In general, you can expect to pay between $0.38-$0.48 per watt. We do sell bulk solar panels by the pallet if you want the best possible deal.
How many 400 watt solar panels does my array call for?
You’ll have to figure out your daily energy usage first (in watt-hours). Then, divide that number by your expected daily output per panel. For example, a small off-grid cabin that needs 10kWh daily needs around 6 panels. The average US residence uses as much as 30kWh daily, though, which works out to around 15-17 panels. We always advocate for a roughly 20% buffer for cloudy days and conversion losses.
How long does a 400W solar panel last?
A long time. These 400W solar panels are backed by 25-30 year warranties so you can place your order with peace of mind. It’s normal to lose around 0.4% of performance every year - so even 30 years later, these panels should produce at around 87% of rated output.
How efficient are these 400W panels?
22.53% to 23.02%. That’s much higher than the average PV solar panel because N-type monocrystalline cells deliver higher efficiency and lower degradation AND because these panels generate energy from the rear side simultaneously.