Solar Regulator for 120W array.

If you have the two panels without a regulator then you definitely require one as the panels will fry the batteries as you thought.
In theory your panels indicate a 10amp flow of amps, however you will never get that much and a 10amp regulator mounted as close to the batteries as possible would do the job ok.
If you ever need/require to increase the panel wattage then a 20 amp reg may be in order and not much dearer anyway.

Ross M

Hi rkc47,

Here is a link to a solar controller on ebay. It is a PWM unit with a 30 amp capacity which will more than do your job and accommodate any future upgrade so long as you do not exceed the 30 amp input limit.

PWM 30amp solar regulator

Understand that MPPT is the best but these PWM regulators are pretty good none the less. It is also the same as the unit in my van.

If I find a suitable MPPT I will put it into a follow up.

Cheers, Bruce

rkc47
I just bought a Morningstar 15A MPPT reg at a really good price $289 to the door. they are a top brand designed in USA. I bought it from Apolloenergy in Melbourne but they have an office in WA. They were about $100 cheaper than anybody else, even buying it from the STATES.

Best of luck Matt

Hi rkc47

I have just been reading this post re PWM vs MPPT and thought it may be of interest to you - some good robust discussion that may be worth while given you are looking to buy a controller.

MPPT vs PWM