Solar Power FAQ

Posting this here since we all should be monitoring our voltage. These make it the easiest I have found and fit ALL vehicles. ---


Full sized OEM Toyota switch blank -

SMALL SIZED switch blank toyota -

Carlin Full sized switch blank -

Now if they would just make it in a SPDT switch with the same wiring like the BLUE SEA ML-ACR accepts, we wouldn't need to take up an additional switch blank/

Something else useful and innovative.

DUAL USB VOLTMETER -!product/prd1/4503749651/double-usb-socket-and-voltmeter

Get them on EBAY and save on the conversion rate from AU to your respective currency. Shipping is free too.


OverCamping Specialist
I like the one for the FJ Cruiser, but the site says for 2010 and on up.
Mine is a 2007, not sure why it would not work.

I take it they are lit up all the time too when the key is off?
Probably no worries though with a low current draw, much like an alarm warning light that blinks all the time.
There are 3 wiring diagrams on their site on how to wire them to a switch. Yes, I believe they are lit all the time though. As you said, I feel that if they fit for one switch blank, they should fit for all of the toyotas. Personally am waiting for a response to my email before I order so I have a little more information.

worst case with the various sizes, you have to trim the monitor slightly to make them fit. - Facts though, all of the switch sizes are standard sizes across the board.

Here is the link to their install guides.

here are the 3 ways they recommend wiring them.,



OverCamping Specialist
Thanks Sky, I think I would go for this option with the simple switch on the ground side.

Seriously thinking of getting this.


OverCamping Specialist
I talked with a guy there, and he joined the forum after seeing the thread.
I still need to order the battery monitor.


OverCamping Specialist
If anyone is interested, the Toyota blank switch dual battery meter total came to $64.50 AUD, but in US currency I paid $49.70, just placed my order.
I think the exchange rate said it was $1.00 US to $1.29 AUD.
Will probably take around two weeks to get it, and after I install it I will have it in my build thread and post a link here to it.

Since this draws such a low voltage, I may just wire them direct.
You do have to add more wire to it, I forget the gauge in my email exchange with them last week, but it is in my email at home.

Question, I have a Blue Sea box in my passenger footwell that goes directly to my aux. battery.
Can I just run the hot lead from this gauges aux, battery side directly to my Blue Sea box since it goes to the battery, or should I run the wire and fuse directly the aux. battery instead?


OverCamping Specialist
Cool, thanks.
It would be just as easy to run it out the same hole that the wire comes in for the Blue Sea box as the battery is right behind the firewall.


Tail-End Charlie
I thought this sticky thread was supposed to be Solar Power FAQ.

You guys need to start a new thread.