Page 1 of 1

Average power consumption indoor module

Posted: 30 Jul 2014, 12:09
by Grinch
Hi,

I've learned that the indoor module requires too much power to use batteries. Anyway I have no other option in my garden, so I'm planning to run it with a solar panel (together with a 3G Router). To get the right dimensions for the systems and batteries I need to know the average power consumption of the module. I already did some measurements with a multimeter and found out on idle it drains 10-30mA and during a measurement peaks up to 200mA. But unfortunately I don't own better tools to get an average of an hour or so. Has anyone done this or more information? Would be very appreciated.

Thanks

Re: Average power consumption indoor module

Posted: 30 Jul 2014, 15:29
by Hache-eLle
Leave the indoor module connected to a power point and purchase an additional indoor module instead?

Re: Average power consumption indoor module

Posted: 30 Jul 2014, 20:41
by Grinch
My garden is 8km off, so an additional indoor module is not really an option ;)

Re: Average power consumption indoor module

Posted: 01 Aug 2014, 10:41
by falkio
Your 3G router will definitely drain more power than the weather station!
Or get a big 12v car battery p.e. 120 Ah and attach a USB car charger to it. So you have a 5V USB power source.

With a mean power consumption of 100mA@5V=0,5W this battery should last 120 days.

Re: Average power consumption indoor module

Posted: 01 Aug 2014, 12:34
by Grinch
The 3G Router drains ~100mA on 5V on idle, so yes more, but compared to the 10-30mA of the weather station it's still not dramatically more, or in other words it makes a difference whether its average is closer to 10 or closer to 30mA on idle :)
Anyway, I guess I'll just size the system to be heavily overpowered (thinking of a 30Wp panel and a 30Ah/12V battery) to be on the safe side.
A big car battery has 2 downsides: I need 2 of them to exchange, which costs as much as the whole solar system and there is no street, so you have to walk and carry the battery the last 500m :|
I also tried an external battery for charging mobiles and tablets. You can get them with up to 22.4Ah on 3.7V which should last for a few days, but the problem is they have an auto-power-off and it seems Router+Weatherstation when on idle do not trigger the "systems attached" mechanism so the battery cuts voltage after a few seconds and goes to standby.

Re: Average power consumption indoor module

Posted: 24 Aug 2014, 10:43
by Matze
Grinch,

Have already found a solition on this?

Thanks

Re: Average power consumption indoor module

Posted: 25 Aug 2014, 16:17
by Grinch
Well, as I posted earlier, I got a 30Wp solar panel, a solar charge controller, a 30Ah 12V AGM battery, a 5V voltage regulator with 2 USB Outputs and a Huawei E5220 UMTS Router. Already did a short test with a smaller battery at home to test the router and power supply. I will mount the solar panel after my vacation end of september. The solar charger counts the Ah of the attached systems, so when it runs for a while it should be easy to tell the average system power consumption. But that then includes voltage regulator and umts router. For the station alone I have no option to measure average power consumption.