Request a Quote!

" is the best! They are such a pleasure to work with! Great brands at the best prices. Special thanks to Renée who always answered my questions on the spot, and giving thoughtful advice." Serge (Tahiti, French Polynesia)
"The experience I had with my purchase was very good. The items I ordered arrived when I expected & were packaged well. My overall purchasing experience was very positive."

- Thank you,
"I recently found EcoDirect & have been extremely happy with their service. They have had all the PV modules, inverters, optimizers and accessories I needed. They provide excellent customer service & turn orders around very quickly. I have switched to EcoDirect for all my parts & materials orders. Highly recommended."

- Zeno
"I wanted to let you know I am very pleased with the service you gave & the quality & condition of the solar panels I received from EcoDirect. I will purchase more items in the future from EcoDirect and will be sure to tell others about your fine operation."

"Thanks EcoDirect! My solar system is up and running; waiting for City and San Diego Gas & Electric inspections this week; so far so good!"

- J.L.,
Oceanside, CA
"I enjoyed ordering what I needed. It was simple and fast, no issues what so ever. If I need something else and its at a good price, I will defiantly order from here again. Also the shipping is at a good price."

- Simon
My shipment arrived on time, as predicted. Very, very good performance by EcoDirect. What more could you ask for from an online material supplier? Looks like the quantity from Quick Mount is spot on & the rails were bundled safely. EcoDirect will be my recommended source to my friends & neighbors for solar.
- Thank you, Jim Lake
Escondido, CA
"Over the past couple of years, I have purchased several items from Ecodirect and I have always been happy with their customer service and prompt delivery of products."

- Chris
"I am very satisfied, everything was as expected."

- Anon

  Home >

Blue Sky SB50L > 50 Amp 12/24 Volt MPPT Charge Controller
Blue Sky 50 Amp 12/24 Volt MPPT Charge Controller - SB50L

Warranty: 5 Years

Availability: This product has been discontinued.

Description Datasheet

Blue Sky 50 Amp 12 / 24 VDC MPPT Charge Controller

Blue Sky's Solar Boost controllers are the "original" MPPT charge controllers. They feature ultra-precise voltage tracking to ensure higher solar yield and better battery life. This model does not include the optional display.


Model SB50L
Series Solar Boost MPPT
Manufacturer Blue Sky Energy


Dimensions (W x H x D) 10" x 8-3/4" x 3-1/2"
Weight 9 lbs

Input (DC)

Rated Current 50 A
Charging Voltage 12 V / 24 V


Data Sheet Blue Sky SB3048 + SB50
Product Manual Blue Sky SB50
Warranty Blue Sky

Manufacturer's Description

Patented Maximum Power Point Tracking (MPPT) technology allows Solar Boost 50 and Solar Boost 3048 to increase charge current up to 30% or more compared to conventional charge controllers. Donít waste money by throwing PV power away! Get the power you paid for with a Solar Boost charge controller.

Solar Boost controllers also provide an advanced fully automatic three stage charge control system to ensure the battery is properly and fully charged, resulting in enhanced battery performance with less battery maintenance. An equalize function is also included to periodically condition liquid electrolyte lead-acid batteries.

An optional user friendly digital display is available to monitor PV charge performance. Optional temperature compensation of charge voltage is also available to further improve charge control and battery performance.

  • Patented MPPT technology increases charge current up to 30% or more!
  • 50A/24V or 30A/48V ratings support large solar module arrays
  • Three stage PWM charge control optimizes charge parameters to battery size and type
  • MPPT power converter can charge lower voltage battery from higher voltage array
  • Electronic current limit prevents overload or nuisance fuse blow
  • Available digital display monitors PV charge performance
  • Durable powder coat finish and conformal coated electronics resist corrosion
  • Fully protected against excess current, temperature, transient voltage and polarity
  • Full 5 year limited warranty
  • ETL listed to UL STD. 1741, certified to CAN/CSA STD. E335-1/2E, CE labelled

Solar Boost controllers increase charge current by operating the PV module in a manner that allows the module to produce all the power it is capable of. A conventional charge controller simply connects the module to the battery when the battery is discharged. When the 75W module in this example is connected directly to a battery charging at 12 volts its power production is artificially limited to about 53 watts. This wastes a whopping 22 watts or nearly 30% of the available power!

Patented MPPT technology used in Solar Boost controllers operates in a very different fashion. The Solar Boost controller continually calculates the module's maximum power voltage, in this case 17 volts. It then operates the module at its maximum power voltage to extract maximum power. The higher power extracted from the module is then provided to the battery in the form of increased charge current. In conditions where extra PV power is not available, Solar Boost controllers will operate as a conventional controller with very low voltage drop.

The actual charge current increase you will see varies primarily with module temperature and battery voltage. In comfortable temperatures, current increase typically varies between 10 to 25%, with 30% or more easily achieved with a discharged battery and cooler temperatures. What you can be sure of is that Solar Boost charge controllers will deliver the highest charge current possible for a given set of operating conditions.

Solar Boost 3048 is a 30 amp 24/48 volt Maximum Power Point Tracking (MPPT) photovoltaic (PV) battery charge controller. Through the use of patented MPPT technology, Solar Boost 3048 can increase charge current up to 30% or more compared to conventional controllers. Solar Boost 3048ís sophisticated three stage charge control system can be configured to optimize charge parameters to precise battery requirements based on battery electrolyte type, battery size in amp-hours, and battery temperature. The unit is fully protected against voltage transients, over temperature, over current, and reverse battery and reverse PV connections. A manual equalize function is provided to periodically condition flooded lead-acid batteries. Solar Boost 3048 also includes an automatic current limit feature which allows use of the full 30 amp capability without worrying about overload or nuisance fuse blow from excessive current.

Solar Boost 3048 employs series pass Pulse Width Modulation (PWM) charge voltage control. The multi-stage charge control system combined with precise PWM voltage control leads to superior charging and enhanced battery performance. To provide optimum charge control on installations where battery load varies widely during charge, Solar Boost 3048 can interface to an external current shunt to provide optimal charge control. The PWM control system uses highly efficient and reliable power MOSFET transistors. The MOSFETís are turned on and off at high frequency to precisely control charge voltage and MPPT. Environmentally sealed high current high reliability relays are used to disconnect the PV array at night to prevent unwanted current drain. Relays are used rather than blocking diodes for improved power conversion efficiency, current boost performance, and true reverse battery polarity protection in an MPPT controller. The relays are not stressed by functioning as part of the voltage control system and continually turning on and off as with other PV controllers. They simply turn on in the morning and off in the evening, and in this application have a life expectancy in excess of 105 operations.

Blue Sky 930-0022-20 > Battery Temperature Sensor
Our Price: $31.25

Blue Sky Battery Temperature Sensor - 930-0022-20

Share your knowledge of this product with other customers... Be the first to write a review