What power stations does the SP037 work with?

It suits power stations and charge controllers that accept a 37.4V solar input, typically larger MPPT models. Check your station's maximum solar voltage before connecting.

Does it really produce 400W?

400W is the rated peak under ideal direct sun. Expect lower output in clouds, shade or when the panel is not angled at the sun.

Can I charge a 12V battery directly?

Not safely without a charge controller rated for its voltage. Use an MPPT controller that accepts the panel's 37.4V input.

The panel is built for outdoor use and light weather, but the junction box and connectors should be kept dry. Do not leave it out in heavy rain.

How does it compare with rigid 400W panels?

Rigid panels cost less per watt and last longer in fixed mounts. The SP037 wins on folding, carrying and setup for temporary use.

The panel, built-in kickstands and a cable to connect to a power station. Check the connector type matches your station.

Where is the ALLPOWERS SP037 400W Foldable Solar Panel cheapest?

At Allpowers US, for $299.00, as of our latest check.

What do buyers say about the ALLPOWERS SP037 400W Foldable Solar Panel?

Rated 4.5 out of 5 from 53 ratings.

Where can I buy the ALLPOWERS SP037 400W Foldable Solar Panel?

3 stores we checked sell it, including Allpowers, Allpowers US, eBay.

ALLPOWERS SP037 400W Foldable Solar Panel

Best price now

$299.00at Allpowers USChecked Nov 9

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit Allpowers US

ALLPOWERS SP037 400W Foldable Solar Panel

Best price now

$299.00at Allpowers USChecked Nov 9

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit Allpowers US

ALLPOWERS discount codes →

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Price facts

Last seen at $299.00 at Allpowers US on Nov 9.
Checked at 3 stores.

Our take on the ALLPOWERS SP037 400W Foldable Solar Panel

The ALLPOWERS SP037 is a 400W foldable solar panel aimed at portable power stations and off-grid charging. It runs at a high 37.4V open-circuit voltage, so it pairs with charge controllers and power stations that accept high input voltage rather than small 12V-only setups. The folding design and carry handle make it packable for camping, van life and emergency backup. Against rigid 400W panels it trades peak efficiency for portability, and owners say output drops in shade, clouds and off-angle sun as with any folding panel.

Best forCampers and van lifers charging a portable power stationEmergency home backup for a large power stationOff-grid cabin and shed chargingOverlanders who need a packable high-wattage panel

Pros

400W rating gives fast charging for large power stations
Folds down with a handle for transport and storage
High 37.4V output suits many MPPT power stations
Adjustable kickstands let you angle it toward the sun
Works for camping, RV and backup use

Cons

High voltage means it needs a compatible power station or charge controller
Folding panels lose output in shade, clouds and off-angle sun
Large unfolded footprint needs open space and steady wind protection
Heavier and bulkier than smaller folding panels

ALLPOWERS SP037 400W Foldable Solar Panel prices at every store

Allpowers USNew
In stock
$299.00Checked Nov 9
Visit Allpowers US
eBayNew
Availability unknown
$414.88Checked Nov 2
Visit eBay
AllpowersNew
Out of stock
$299.00Checked Nov 9
Visit Allpowers

Store links may earn us a commission. Some prices via Klarna.

ALLPOWERS SP037 400W Foldable Solar Panel price history

$299.00$299.00

Nov 2Nov 9

Lowest price we've seen: $299.00 on Nov 2 at Allpowers US. Tracked across 3 stores since Nov 2.

What reviewers say

4.5 / 553 ratings

Owners rate it well overall, praising the charging speed for large power stations and the foldable build. Complaints center on output falling short of 400W in real sun and on the panel's size and weight when set up.

What people mention

Charging speedPraisedOwners say it refills large power stations noticeably faster than smaller folding panels in direct sun.
Real outputCriticisedSome buyers report output well under 400W in real conditions, especially with clouds or partial shade.
PortabilityMixedIt folds and carries well for its wattage, but owners call it heavy and awkward once unfolded.
Voltage compatibilityMixedThe 37.4V output works with many MPPT power stations but not with 12V-only setups.
BuildPraisedOwners describe the panel and kickstands as sturdy enough for regular outdoor use.

Specifications

Maximum Output: 37.4 volts
Voltage: 37.4V
Wattage: 400W
Type: Solar PanelsSource
Power (W): 400.0Source

Questions and answers

What power stations does the SP037 work with?: It suits power stations and charge controllers that accept a 37.4V solar input, typically larger MPPT models. Check your station's maximum solar voltage before connecting.
Does it really produce 400W?: 400W is the rated peak under ideal direct sun. Expect lower output in clouds, shade or when the panel is not angled at the sun.
Can I charge a 12V battery directly?: Not safely without a charge controller rated for its voltage. Use an MPPT controller that accepts the panel's 37.4V input.
Is it waterproof?: The panel is built for outdoor use and light weather, but the junction box and connectors should be kept dry. Do not leave it out in heavy rain.
How does it compare with rigid 400W panels?: Rigid panels cost less per watt and last longer in fixed mounts. The SP037 wins on folding, carrying and setup for temporary use.
What is in the box?: The panel, built-in kickstands and a cable to connect to a power station. Check the connector type matches your station.
Where is the ALLPOWERS SP037 400W Foldable Solar Panel cheapest?: At Allpowers US, for $299.00, as of our latest check.
What do buyers say about the ALLPOWERS SP037 400W Foldable Solar Panel?: Rated 4.5 out of 5 from 53 ratings.
Where can I buy the ALLPOWERS SP037 400W Foldable Solar Panel?: 3 stores we checked sell it, including Allpowers, Allpowers US, eBay.