Solar Controller Wiring ?

Thanks, MrWizard!!! You answered my loosey-goosey question.

you must use all 4 wires
you can not run just one battery wire .. the plus with out the negative
it will not be a complete circuit

many controllers are constructed using either common negative or common positive
what that means is the other side the "NON-common" connection is the one that is used to control the charging

a controller with common negative controls the PLUS side output
a controller with common positive controls the negative side output

in most solar installs using all (4) connections two for the panels , two for the batteries, the results are the same the batteries are charged as needed and the solar is isolated from the batteries by the "controlled connection"

common neg does NOT mean only (3) terminal connections
i have NOT seen that on any controller

Sorry for confusing ya'll!! Yes, I am asking aboot a controller with 2 connecs for the panel, and 2 connects for the battery. This is just a info question, no particular controller in mind. And I have seen some out there with common negatives (yes, 3 connecs!!).

So, why or how does it differ if you have the 4 connecs vs connecting the negatives together??? I guess I should ask a mfg since even install instructions don't answer the question.

Generally you list the model and brand of controller, then you go online to see if they have installation instructions, if it didn't come with them.

assuming you mean 10 amp MPPT
the 60w aka 4amps panel is No problem

but your electrical terminal description leaves something to be desired

how many screws / connections are available 4 or 3 or 6

if there are only 3, one place for both battery and panel negatives
yes it will work, as long as you are not connecting another controller that is built differently to the same battery

but if there are 4 connections, you need to utilize all 4, using 4 different wires
i have not seen a controller with only 3 connection points

Yes about any controller can handle a 60 watt panel.

Assume the '10 watt MPPT controller' was a typo.

List the specs of the panel and controller model for best answers.

If the controller is set up to do it that way, you will be fine. If they don't have a common negative and you connect them, you may be buying a new controller. I have one of each but it's my lower watt controller that separates the negatives.