38898 SunSaver MPPT 15 A Charge Controller for 12 or 24 V Batteries
A Charge Controller Designed for Large Solar Panels
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The 38898 consists of a Morningstar 15 A charge regulator that has been re-configured by Campbell Scientific and includes the mounting hardware to mount it to a 2.54 cm (1 in.) grid back panel. This charge controller is well suited for large power supplies, which includes an AGM battery (BP84 84 Ah 12 V Sealed Rechargeable Battery) and a large solar panel (SP370-L 370 W Solar Panel). As an additional benefit, Campbell Scientific provides full support of the SunSaver MPPT.

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Benefits and Features

  • Preconfigured to work with AGM battery types and to prioritize data collection over long-term battery health
  • 12 V or 24 V battery charging
  • 60 Vdc maximum input compared with the 50 Vdc on the CH201 and 40 Vdc on the CH150
  • Selectable battery type: gel, sealed, AGM, flooded
  • Programmable low voltage disconnect (LVD)
  • Auto-equalization feature for AGM battery types
  • Terminals for remote temperature sensor (RTS) to compensate charging based on battery temperature; use pn 38899
  • Built-in temperature sensor for use when no RTS is provided
  • Battery status LEDs to provide battery state of charge and indicate fault condition
  • RS-232 communication with pn 34540


Front view
Back view
Left view
Right view
Bottom view

Detailed Description

The 38898 uses maximum power point tracking. While the 38898 is capable of RS-232, Modbus, and USB communications, only RS-232 communication is supported through the hardware. Note: When reading parameters off the 38898 using a data logger, you must use the CPI/RS-232 port. This functionality does not work when using the control ports.

The 38898 offers the ability to select the battery type: gel, sealed, AGM, or flooded. To set the battery type, use a jumper and switch #1.

The 38898 offers programmable low voltage disconnect (LVD). From the manufacturer, the 38898 comes with an 11 V LVD when switch #2 is on and an 11.5 V LVD when switch #2 is off. At Campbell Scientific, we prioritize data over battery health and reconfigure the LVD to 8.5 V and the LVR to 10.0 V. Caution: Draining a battery below 11.5 V will shorten the life of the battery. 


Operational Temperature -40° to +60°C
Storage Temperature -55° to +100°C
Battery Voltage Range 7 to 36 V (power out)
Maximum Input Voltage 60 V
Quiescent Current 35 mA
  • CE and RoHS
  • IEC 62109
  • ETL Listed (UL-1741 and Canadian CSA C22.2 No.107.1.01)
  • FCC Class B Part 15 compliant
  • Manufactured in a certified ISO 9001 facility.
  • 6.43 x 16.89 x 7.26 cm (2.53 x 6.65 x 2.86 in.) without mount foot
  • 6.43 x 19.1 x 7.26 cm (2.53 x 7.52 x 2.86 in.) with mount foot
Weight 589.67 g (1.3 lb)


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Data Loggers

Product Compatible Note
CR1000 (retired) The CR1000 is not compatible in terms of communication.
CR1000X The CR1000X is compatible in terms of communication.
CR300 The CR300 is compatible in terms of communication.
CR310 The CR310 is compatible in terms of communication.
CR350 The CR350 is compatible in terms of communication.
CR6 The CR6 is compatible in terms of communication.

Power Supplies

Product Compatible Note
SP10R-L (retired)
SP20R-L (retired)

Additional Compatibility Information

The 38898 can be used to power any 12 V device. Refer to the Compatibility information on the web page regarding communication compatibility with data loggers.

Listed Under

Common Accessory for the following products:

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