User manual

Firmware Update
STEP 1: Download MSLoad and v09 (or newer) Firmware Update
A) MSLoad is the utility used to upload new rmware les to Morningstar products. This
utility is included in the .zip le containing the v09 update (available in the Tech Support
section of the Morningstar website, www.morningstarcorp.com). Download and save the
v09 (or newer) update .zip le to your computer.
B) Extract the .zip le to your Desktop. The extraction folder should contain three items:
i) SSMPPT_Update_v09.msc (or newer)
ii) README.txt
iii) MSLoad.exe
STEP 2: Prepare SunSaver MPPT to Receive Update
A) Connect the PC to the serial (9 pin) input of the PC MeterBus Adapter (model: MSC)
using a direct serial connection or a USB/Serial adapter. Use the serial cable provided
with the MSC adapter.
B) Connect the MSC MeterBus output (RJ-11) to the METER port on the SunSaver MPPT
using the RJ-11 cable provided with the MSC adapter. Make sure the cable is pushed in
all the way to the METER port until you hear a ‘click’.
C) Using a battery or adjustable power supply (battery or supply voltage must be 8V-36V),
connect the battery/supply NEGATIVE to the Battery (-) terminal on the SunSaver MPPT.
D) DO NOT connect the battery/supply POSITIVE to the controller at this time. However,
have the cable close by and ready for connection to the controller.
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