PicoCell 3500

SunTech offers you the ability to upgrade a hard starting DOL single- or three-phase motor system to a soft start Variable Frequency Drive Technology running on solar power. The PicoCell 3500 universal controller can power motors, pumps, compressors or other inductive loads regardless of whether it is 50HZ or 60HZ, 120Vac or 240Vac. Now you can retrofit single-phase 2HP – and up to three-phase 3HP – pumps, fans and compressor motors. Designed for remote off-grid installations, the weather proof all aluminum chassis/heat sink is IP65 rated for harsh outdoor environments and can operate in high temperatures, humidity and corrosive environments.

SunTech Drive engineers have improved on the functions and features of traditional solar controllers to run inductive motor loads by replacing old electromagnetic designs with high voltage silicon components intelligently controlled by our patented adaptive firmware. The PicoCell 3500 integrates the functions of an inverter, VFD, MPPT controller, phase initiator and voltage boost with automatic control.





  • Run installed or new A/C
  • motor/pump/compressor with free solar power up to 3HP
  • Universal controller for 1.5HP-3HP motors – Single/Three Phase, 50/60Hz, 120V/240Vac
  • Smart technology that is easy to deploy, and can provide significant cost savings
  • Small sized box, simple hook up, weather proof, durable and automatic starting capacity
  • Maximizes solar panel efficiency allowing fewer panels to supply the needed power
  • Changes a 1 or 2 speed A/C motor into a soft start, VFD (Variable Frequency Drive)
  • VFD extends useful pump time by running motor during lower solar output
  • Solar Projects for homes and business can qualify for Tax Credits, Grants, State and Local Rebates and incentive programs
  • WiFi communication/control modules available as optional accessories
  • Patented, Engineered and Manufactured in the USA
  • PicoCell supports up to 2 digital and 2 analog inputs
  • Integrated DC Disconnect and PV Parallel Junction



MPPT operating voltage: 100-380Vdc

PV panels open circuit voltage: 400Vdc

Minimum operating PV voltage: 100Vdc

Maximum PV panel current: 15A

Single phase AC motor power: 12A

Three phase AC motor power: 10A       

Dual Solar Array Input

Protections: Over current, over-voltage and over temperature

Optional: WiFi communication module, GFCI protections 


Degree of protection: NEMA3/IP65

Enclosure material: Aluminum

Operating temperature: -40°C to 50°C

Dimensions:  18″x10″x5″

Solar terminal: AWG#10-14

Motor terminal: AWG#8-14

Sensor terminal: AWG#14-18

Cooling: passive – no fan




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