solar panel regulator

I would go for the 30A model,just a bit more $

yer 120watt !! cheers for that .....

Grant , thats a big jump ??? 10A to 30A

we dont know what he's sucking out of the regulator on the output side.

you wont get a mppt regulator for $40, you'll find it's only labelled MPPT but has no MPPT electronics inside it

It's a 120W panel, it will unlikely to be a to supply 10A to the regulator, therefore you will not be able to draw more than 10A from the panel.

Granted if the regulator is also being used as a low voltage cutout then he will need to ensure the load doesn't exceed 10A but as it hasn't been a problem before why would it become one now?

I have a 120W panel and an MPPT controller at the battery end of a 10metre 8 gauge wire.
The most I have ever seen is 8 amps output through My ABR gauge.

So IMHO a 10 amp controller is plenty.

I have an Australian produced GSL MPPT and it works very well with the panels linked in series rather than parallel. The controller automatically detects the battery voltage and drops the 36 volts or so to around 14.
Regards Philip A

Hi
10A is about the MAX charging current that you would ever get out of a 120W panel ,with aMPPT reg.
MPPT reg ratings are based on output current
BUt if you are thinking of installing more panels, you should think about a higher rated reg

PeterQ

I think what Grant t1 was referring to above was the load current. For instance my Projecta solar control is also a battery manager. Standard setup, 20A solar controller, battery connected to the battery terminals, solar panels to the solar terminals, load to load terminals.

It monitors charge into and out of the battery, catch 22 is the controller is rated at 20A, if you try and draw more than 20 amps from the battery the overload protection trips and disconnects the battery, therefore in this case the controller not only needs to be dimensioned on the solar input but also on the peak demand.

+1 to 'quality is always the cheaper option'. Nicely put.

I've dealt with ABR Sidewinder too with good outcomes. No financial interest btw.

Everyone's making mountains out of molehills...Just get the 10amp...It will do the job easily..

cheers