Solar panel question

A quick follow up on this as i am potentially looking at doing something similar with a bush hut i have.

I am looking at 250w panels and was thinking about getting 2 or 3 of these, but getting clarification if they are 24 or 12v panels.

IF they are 24v panels, do i need a converter to go from 24v to 12v before going through a Solar Charge controller or will the charge controller do this and accept the 24v with a 12v output to charge a battery etc.

Neddy,

If you establish that they are 24V panels, just get yourself a solar regulator that will accept the higher voltage input for a 12V output. They are common.

As always, there is a caution. If you get three of those, that would be 750 watts of solar. This exceeds the max solar WATTAGE input of many 12V controllers, even if they accept the higher input VOLTAGE.

To cope with both you will need something like this.

750 watts of solar could deliver in excess of 45 amps into the batteries. Make sure your battery setup can accept that sort of current. EG, Typical max charging current for AGM deep cycle batteries is 10 to 15% of the C20 amp hour rating. So a 100Ah battery should be charged at a max rate of 10 to 15 amps. You would need at least three and perhaps four such batteries in parallel in order to safely accept the output from 750 watts of solar.

There are other batteries that will accept high charge currents, so the above depends on your choice of battery.

I have a 30 amp version of that GSL for my hybrid camper. It is quite excellent, and I can recommend the brand. Talk to GSL about your system. (Usual disclaimer - no affiliation, just a satisfied customer.)

There are others, of course.

Cheers