Wattstanding
FOSSiBOT SP420 Solar Panel

Product image: Fossibot

Solar panel · Fossibot

FOSSiBOT SP420 Solar Panel

Fossibot · 420 W solar panel

The short answer

The FOSSiBOT SP420 Solar Panel is a 420 W solar panel panel. By our calculation it can add roughly 1,638 Wh on an average Florida/Gulf Coast day and 1,323 Wh in the Northeast. Fossibot lists it at $429, about $1.02 per watt.

Rated power
420 W
Type
Solar Panel
Voc
38.4 V
Weight
30.79 lb
Price seen
$429

Good fit if

  • You want to recharge a power station from sunlight during a multi-day outage
  • Your station's solar input accepts this panel's voltage, current and connector

Look elsewhere if

  • You have not checked your station's solar input limits
  • You need guaranteed charging in winter or under heavy cloud
$429Fossibot listed price (base model) · seen 30 Sep 2026
View at FossibotCheck price on Amazon

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

How much energy it adds

A 420 W panel produces its rated power only in ideal conditions. Heat, sun angle and cable losses reduce real output; we assume 75% of rating.

Estimated energy per average day, by region
RegionPeak sun hours (approx.)Estimated energy
Florida and the Gulf Coast5.21,638 Wh/day
Texas5.01,575 Wh/day
California5.51,732 Wh/day
Southeast (GA, SC, NC)4.71,480 Wh/day
Mid-Atlantic and Northeast4.21,323 Wh/day
Midwest and Great Lakes4.21,323 Wh/day
Mountain West5.41,701 Wh/day
Pacific Northwest3.61,134 Wh/day
Wattstanding calculationWattstanding calculation — Wh/day = panel watts × 75% × peak sun hours. For example 420 W × 0.75 × 5.2 h = 1,638 Wh. Sun-hour figures are approximate annual averages; winter and cloudy days are much lower.

Pairing it with a power station

A power station accepts solar input only within its own voltage and current limits. Compare this panel's figures with the station's stated solar input before connecting anything.

  • Voc 38.4 V
  • Vmp 32 V
  • Isc 15.7 A
  • Imp 13.1 A
Seller or manufacturer claimConnector as listed: Standard MC4 Connector

Use the solar recharge calculator to see how many sunny days a station needs.

Fit check before you buy

Checks to make against the power station you plan to charge.

✓ Required? Check firsti Good to know
  • ✓Station solar input limitsVoltage, current and watt limits of the station's solar port.
  • ?ConnectorStandard MC4 Connector
  • iSpace and anglePanels need open sun and an angle toward it; shade on part of a panel can cut output sharply.

Specifications

Each figure is labelled with where it comes from. Numbered references link to the source list below.

Manufacturer storeRetailer listingWattstanding calculationNot verified

Published specifications

Rated power420 W[S1]Manufacturer store
Cell typeMonoCell[S1]Manufacturer store
Open-circuit voltage (Voc)38.4 V[S1]Manufacturer store
Voltage at max power (Vmp)32 V[S1]Manufacturer store
Short-circuit current (Isc)15.7 A[S1]Manufacturer store
Current at max power (Imp)13.1 A[S1]Manufacturer store
Stated efficiency23.4%[S1]Manufacturer store
Output connectorStandard MC4 Connector[S1]Manufacturer store
Weight30.79 lb[S1]Manufacturer store
Dimensions87.83*40.79inch (2231*1036mm)[S1]Manufacturer store
Warranty12 Months[S1]Manufacturer store

Wattstanding calculations

Energy per day — Florida and the Gulf Coast1,638 WhWattstanding calculation
Energy per day — Texas1,575 WhWattstanding calculation
Energy per day — California1,732 WhWattstanding calculation
Price per watt$1.02Wattstanding calculation

Limitations to weigh

  • Specifications are the maker's or seller's; Wattstanding has not tested this product.
  • Energy figures are calculations from approximate sun-hour averages, not measurements.
  • Prices change; confirm the price and what is included.

Alternatives worth comparing

VTOMAN 400W Foldable Portable Solar Panel400 W; $29 less
Renogy 220/400W Portable Solar Panel Suitcase400 W; $67 more
Zendure 500W Bifacial Solar Panels500 W; $69 less
Dabbsson 420W Portable Solar Panel420 W; $170 more

Where to buy

Our link opens this exact product page. Prices and stock change; check before you order.

$429Fossibot listed price (base model) · seen 30 Sep 2026
View at FossibotCheck price on Amazon

Every link opens the product page for this exact model. We may earn a commission; it never changes what we publish. Disclosure

Questions buyers ask

How much power does the FOSSiBOT SP420 Solar Panel produce?
It is rated 420 W. Real output is usually lower; we estimate about 1,638 Wh on an average Gulf Coast day.
Where can I buy the FOSSiBOT SP420 Solar Panel?
1 seller list it: Fossibot.

Sources and verification

  1. Fossibot — FOSSiBOT SP420 Solar Panel — product page and specifications Retrieved 30 Sep 2026

Wattstanding has not tested this product hands-on. This reference is compiled from the sources above; our calculations are labelled and show their working. Electrical work belongs to a licensed electrician. Last verified 30 Sep 2026. How we work