I am trying to improve the setup of a remote weather station that I am responsible for.
It is a Onset U30 data logger. The factory supplies a small 4-volt (10Ahr) sealed battery that has trouble maintaining the unit during the winter. I want to upgrade the system to use a 12-V deep cycle marine battery.
The Onset technician says that their U30 needs 3.5 volts to operate, 4-5 volts optimally, and can tolerate up to 8 volts input. It sips power and can run quite a long time on just a battery.
I found a unit that looks like this in one of our labs.
http://www.amazon.com/Docooler-Cont...462814151&sr=8-11&keywords=voltage+controller
It behaves strangely though. When I hook it up to a 12V supply on the solar terminals, the battery terminals show a few millivolts less, but theload terminals show no voltage. Stranger if I meter the negative battery terminal to the positive load terminal I get 12V, and if I meter the negative battery terminal and the negative load terminal I get 9V. If I meter the two load terminals I get 0.1V.
I also got something similar to one of these.
http://www.amazon.com/dp/B00CBCGAL8..._m=ATVPDKIKX0DER&pf_rd_r=03JQVXZT51D8T7MGMDTC
But the manufacturer says it needs _exactly 12V_ all the time to work. Would not discuss <12V or >12V with me.
So. I'm looking for another solution.
I want to supply between 4-6 DC Volts to the weather station.
I want to use a 12 V deep cycle
I want to charge the battery with the solar panel. The one I have I think is 12V... output varies between 10 and 14 or so I think.
A weather resistant would be desirable, but the electronics are contained in a weather-proof box.
A better made solar controller may be all I need, but given the one I found and that seeming to be such a prevalent model I don't know what to shop for.
I could consider getting a different battery, but we have lots of these marine batteries lying around unused... so it would be good to at least try to use one of these.
It is a Onset U30 data logger. The factory supplies a small 4-volt (10Ahr) sealed battery that has trouble maintaining the unit during the winter. I want to upgrade the system to use a 12-V deep cycle marine battery.
The Onset technician says that their U30 needs 3.5 volts to operate, 4-5 volts optimally, and can tolerate up to 8 volts input. It sips power and can run quite a long time on just a battery.
I found a unit that looks like this in one of our labs.
http://www.amazon.com/Docooler-Cont...462814151&sr=8-11&keywords=voltage+controller
It behaves strangely though. When I hook it up to a 12V supply on the solar terminals, the battery terminals show a few millivolts less, but theload terminals show no voltage. Stranger if I meter the negative battery terminal to the positive load terminal I get 12V, and if I meter the negative battery terminal and the negative load terminal I get 9V. If I meter the two load terminals I get 0.1V.
I also got something similar to one of these.
http://www.amazon.com/dp/B00CBCGAL8..._m=ATVPDKIKX0DER&pf_rd_r=03JQVXZT51D8T7MGMDTC
But the manufacturer says it needs _exactly 12V_ all the time to work. Would not discuss <12V or >12V with me.
So. I'm looking for another solution.
I want to supply between 4-6 DC Volts to the weather station.
I want to use a 12 V deep cycle
I want to charge the battery with the solar panel. The one I have I think is 12V... output varies between 10 and 14 or so I think.
A weather resistant would be desirable, but the electronics are contained in a weather-proof box.
A better made solar controller may be all I need, but given the one I found and that seeming to be such a prevalent model I don't know what to shop for.
I could consider getting a different battery, but we have lots of these marine batteries lying around unused... so it would be good to at least try to use one of these.