These are the best charge controllers on the market, they are solid, reliable and what we use for The Bimble Inn.
The FLEXmax family of charge controllers is the latest innovation in Maximum Power Point Tracking (MPPT) charge controllers from OutBack Power Technologies. The innovative FLEXmax MPPT software algorithm is both continuous and active, increasing your photovoltaic array power yield up to 30% compared to non-MPPT controllers. Thanks to active cooling and intelligent thermal management cooling, both FLEXmax charge controllers can operate at their full maximum current rating, 60 Amps or 80 Amps respectively, in ambient temperatures as high as 104°F (40°C).
Included in all of the FLEXmax Charge Controllers are the revolutionary features first developed by OutBack Power, including support for a wide range of nominal battery voltages and the ability to step-down a higher voltage solar array to recharge a lower voltage battery bank. A built-in, backlit 80 character display shows the current status and logged system performance data for the last 128 days at the touch of a button. The integrated OutBack network communications allows FLEXmax series Charge Controllers to be remotely programmed and monitored via a MATE system display and provides unrivaled system integration.
FLEXmax MPPT Charge Controllers are the only choice when you demand a high performance, efficient and versatile charge controller for your advanced power system.
A note on Outback and lithium: Outback MPPT's can't be controlled by a Lithium battery BMS that needs comms, so you can't use e.g. Pylontech with them. But, you can set up certain charging profiles that are suitable for lithium batteries that have a dumb BMS that doesn't need communication. With Outback systems we sell and recommend Gcell batteries.
Using an Outback controller would invalidate any Pylon battery warranty, as the Pylons need to be able to control the charging voltage and current.
Recommended PV Max
FLEXmax 60 Specifications
Nominal Battery Voltages
12, 24, 36, 48, or 60 VDC (Single model - selectable via field programming at start-up)
Maximum Output Current
60 amps @ 104° F (40°C) with adjustable current limit
Maximum Solar Array STC Nameplate
12 VDC systems 900 Watts / 24 VDC systems 1800 Watts / 48 VDC systems 3600 Watts / 60 VDC Systems 4500 Watts
NEC Recommended Solar Array STC Nameplate
12 VDC systems 750 Watts / 24 VDC systems 1500 Watts / 48 VDC systems 3000 Watts / 60 VDC Systems 3750 Watts
PV Open Circuit Voltage (VOC)
150 VDC absolute maximum coldest conditions / 145 VDC start-up and operating maximum
Standby Power Consumption
Less than 1 Watt typical
Power Conversion Efficiency
98.1% @ 60 Amps in at 48 VDC System voltage - Typical
Five Stages: Bulk, Absorption, Float, Silent and Equalization
Voltage Regulation Set points
10 to 80 VDC user adjustable with password protection
Programmable Voltage Setpoint and Duration - Automatic Termination when completed
Battery Temperature Compensation
Automatic with optional RTS installed / 5.0 mV per °C per 2V battery cell
Voltage Step-Down Capability
Can charge a lower voltage battery from a higher voltage PV array - Max 150 VDC input
Programmable Auxilary Control Output
12 VDC output signal which can be programmed for different control applications
(Maximum of 0.2 amps DC)
3.1" (8 cm) backlit LCD screen - 4 lines with 80 alphanumeric characters total
Remote Display and Controller
Optional Mate or Mate2 with RS232 Serial Communications Port
Proprietary network system using RJ 45 Modular Connectors with CAT 5e Cable (8 wires)
Last 128 days of Operation - Amp Hours, Watt Hours, Time in Float , Peak Watts, Amps, Solar Array Voltage, Max Battery Voltage Min Battery Voltage and Absorb for each day along with total Accumulated Amp Hours, and kW Hours of production
Hydro Turbine Applications
Consult factory for approved Turbines
Positive Ground Applications
Requires two Pole Breakers for switching both positive and Negative Conductors on both Solar Array and Battery Connections (HUB-4 and HUB-10 can not be used for use in positive ground applications)
Operating Temperature Range
Minimum -40° to maximum 60° C
(Power capacity of the controller is automatically derated when operated above 40° C)
Indoor Type 1
One 1" (35mm)on the back; One 1" (35mm) on the left side; Two 1" (35mm) on the bottom