III. Confi gure Remote Access
Confi gure remote access to allow communication with your TriStar MPPT from any computer or
device on the internet. Use MSView or a web browser to view your solar system’s real-time oper-
ating information.
NOTE:
Before proceeding, make sure the TriStar MPPT is correctly confi gured and connected to your home/
business network per the directions in Section II.
NOTE:
Because there are many different types and manufacturers of network routers, the exact steps required
cannot be fully documented here. However, details are provided on where to get further information.
!
CAUTION:
All incoming requests addressed to controllers and devices that are connected (bridged) to the EIA-485
port on the TriStar MPPT will be passed both READ and WRITE modbus requests without exception.
Setting switch #8 on the TriStar MPPT only prevents WRITE requests to the local controller. For this
reason, we do not recommend enabling remote access to systems with bridged EIA-485 networks unless
extra network security measures are implemented.
Is this secure?
The vast majority of viruses, malware, scripts, etc are designed to exploit security fl aws in ma-
jor operating systems and their software. Malicious attackers wishing to do harm will only have
access to the TriStar MPPT. The TriStar does not have an operating system or web browser to
exploit. It only accepts and responds to properly structured MODBUS TCP requests. If setting
switch #8 is in the OFF position, the controller will only allow requests to read information and will
not allow requests to write data. While anything is possible, it is unlikely that this confi guration
poses a signifi cant security risk.
It is also worth noting that the networking and charge controller functions of the TriStar MPPT
are separate and executed by two (2) separate processors. If the network processor crashes for
any reason, the charge controller functionality will continue unaffected.
Part A - Confi gure the Network Router and TriStar MPPT
A router provides a gateway between the internet and your private local network. A router is usu-
ally provided to DSL, cable, fi ber, and satellite customers by their internet service provider (ISP).
The router connects to the incoming phone line, cable coax, or fi ber line and provides one (1) or
more Ethernet ports for your home/business computers.
Most network routers have a web interface for confi guration. This interface is usually protected
by password. If your router was supplied by your ISP (Cable, DSL, satellite company), they can
provide you with the login/password needed to access the router confi guration. If you purchased
and installed your own router, the factory default password should be provided in the router docu-
mentation.
Step 1 - Retrieve the Current TriStar MPPT Network Settings
Open a web browser on any computer on your local networka.
Open the TriStar MPPT live view webpageb.
Click the “Network” link at the top of the pagec.
Write down all the information in the Current Network Settings sectiond.
Also note under the “Settings” section if “Obtain IP address from DHCP server” is selected.e.
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