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Solar Charge Controller NV-12V010

Click here to see instructions for the 20A Charge Controller

10A Charge controller wiring schematic  

How to connect the controller

Pay careful attention to the polarity of connections. Always attach + to + and - to -

Step 1 Connect the battery to the controller via the two central connections on the controller (+ve to +ve, -ve to -ve). Once you have done this you can use the "push button" on the right of the controller to change the mode and the "BAT" light will light up to show the controller is correctly connected to the battery.
Step 2 Connect the solar panel to the controller, (again connect +ve to +ve and -ve to -ve). The "SUN" LED will now light if the panel is in sunlight.
Step 3 Connect your 12V appliances either directly to the battery (if the load is over 10A) or to the right hand terminals (the "load" output) if the load is under 10A. If you connect to the "load" output then the controller will protect your battery from over-discharging by cutting out when the battery nears zero charge. Using these terminals you can also use the optional "night timer" function on the controller. The optional "night timer"function means your appliances (such as lighting) only turn on at night.
Step 4 Finally, if you are using the "load" output on the controller, set the mode of the output on the controller to the desired number (16 for normal use or 0-15 for various night timer settings). See below for how to set the mode of the controller.

 

Designing your system

Adding to an existing system: In many cases where you simply add your panel and controller to an existing system (e.g. in a caravan or canal boat) all loads will be already wired to the battery and there is no need to change this. In this case just connect the panel and controller to your battery and leave the original system in place.
Making a new system or adding to an existing system: For a new system you may also wish to wire loads to the "load" output and use mode 16 for permanent use or modes 0-15 if you want the output only to be on at night. This output will turn off when the battery is discharged in order to protect the life of the battery (over-discharging reduces the life of lead acid batteries). Because this cuts out when the battery is discharged, essential loads like emergency lighting and fire alarms should be run directly from the battery. Also, loads of over 10A should be run from the battery as the "load" output is limited to giving 10A.
It is essential to connect the panel and the "load" (if using the "load" output) to the controller terminals shown in the diagram In particular, some existing circuits may use a common -ve for the battery connected circuits. This should not be connected in any way to the panel -ve input, nor to the "load" -ve output.

10A Charge Controller Indicator Lights
 

Indicator lights

"SUN" indicator light Green means the panel is charging the battery. Green flashing rapidly means there is excessive voltage coming from the battery and indicates a fault. This shuts down the controller's outputs.
"BAT" indicator light Green means the battery is well charged. Green slowly flashing means the battery is fully charged. Orange means the battery is low. Red means the battery is discharged and the controller will turn off the "load" output until the battery recovers.
"LOAD" indicator light Yellow means the "load" output is on. Yellow slowly flashing means the output is overloaded - i.e. over 10A. Yellow rapidly flashing indicates short circuit in the load.

 

Mode

Battery output The controller will always charge the battery whenever there is sufficient power generated by the solar panel.
Load output For the "load" output, the controller also has an optional "night timer" function. If you want, you can set this to have the "load" output from the controller on only at night. This "load" output also has over-discharge protection which means the controller will shut off this output if the battery is over-discharged to prevent damaging your battery.

 

Setting the mode and optional "night timer"

Press the button and hold until the display starts flashing. Subsequent presses advance the number on the display. Leaving the button unpressed for 30 seconds sets the mode to the last number on the display. Output mode 16 turns the night timer function off. Subsequent presses of the button, once the mode is set, switches the "load" output to being permanently on or permanently off. The following table shows how the controller behaves in different modes.

00 Load output on from 10 minutes after panel stops producing electricity (night fall) until 10 minutes after panel starts producing electricity (sun rise) 09 Load output on from 10 minutes after night falls for 9 hours or until sun rises
01 Load output on from 10 minutes after night falls for 1 hour or until 10 minutes after sun rises 10 Load output on from 10 minutes after night falls for 10 hours or until sun rises
02 Load output on from 10 minutes after night falls for 2 hours or until sun rises 11 Load output on from 10 minutes after night falls for 11 hours or until sun rises
03 Load output on from 10 minutes after night falls for 3 hours or until sun rises 12 Load output on from 10 minutes after night falls for 12 hours or until sun rises
04 Load output on from 10 minutes after night falls for 4 hours or until sun rises 13 Load output on from 10 minutes after night falls for 13 hours or until sun rises
05 Load output on from 10 minutes after night falls for 5 hours or until sun rises 14 Load output on from 10 minutes after night falls for 14 hours or until sun rises
06 Load output on from 10 minutes after night falls for 6 hours or until sun rises 15 Load output on from 10 minutes after night falls for 15 hours or until sun rises
07 Load output on from 10 minutes after night falls for 7 hours or until sun rises 16 Load output will be on or off permanently (pressing the button once quickly turns between on and off)
08 Load output on from 10 minutes after night falls for 8 hours or until sun rises 17 Test - Load output will be on with no power from the panel and off with power from the panel. As mode0 without delays