Solar Panels / SP20R-L
This product is no longer available.
SP20R-L 20 W Solar Panel with Regulator
Services Available
Repair Yes
Free Support Yes


The SP20R is 20-W photovoltaic power source capable of recharging batteries. It has an on-board voltage regulator, and a 6.1 m (20 ft) cable with stripped and tinned leads that connect directly to a user-supplied deep-cycle battery.

The SP20R is often used for system configurations that have higher-than-average power requirements, or in higher elevation and latitude locations. It allows unattended operation of systems in remote locations, far from AC electrical sources.

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Benefits and Features

  • Supplies electrical power in locations where ac power is unreliable, expensive, or not available
  • On-board voltage regulator allows direct connection to a user-supplied external battery


Detailed Description

The SP20R includes mounting hardware consisting of the the pn 17492 U-bolt and Matching Nuts. The pn 17492 U-bolt provides a 2.125" (5.398 cm) space between the U-bolt legs. This hardware allows the solar panel to be mounted to a 0.75" to 1.5" IPS pipe (1" to 2" OD).

Please note that the SP20R has a 2-mA continuous current drain (meaning that it consumes a small amount of power from the connected battery at night).


-NOTE- Solar panel characteristics assume 1 kW m-2 illumination and 25°C solar panel temperature. Individual panels may vary up to 10%. The output panel voltage increases as the panel temperature decreases.
Maximum Peak Power 20 W
Current at Peak 1.19 A
Maximum Allowable Wind Gust Speed
  • Note: The wind ratings are for solar panels with the indicated mounts and do not account for strength of tower or tripod.
  • 44 m s-1 (99 mph) Standard mount
  • 58 m s-1 (130 mph) Extended mount
Voltage at Peak 16.8 V
Current Drain 2 mA (continuous)
Guaranteed Minimum Peak Power 18 W
On-board Regulator Included Yes
Dimensions 50.0 x 42.2 x 5.1 cm (19.7 x 16.6 x 2 in.)
Weight 6.2 kg (13.6 lb)



The solar panel includes an onboard regulator for direct connection to a user-supplied flooded battery.


The SP20R-L is compatible with user-supplied, flooded, 12 Vdc batteries, such as deep-cycle marine or RV batteries.


  • Flooded batteries should be charged with the 18529 MorningStar SunSaver regulator or the SP20R.
  • The SP20R draws a continuous 2 mA current drain. The 18529 MorningStar SunSaver draws a continuous 8 mA current drain. 

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