PWM vs MPPT

[simonfraser]

120W for two 110Ah lead acid batteries
I use the boat during the winter, that's when I am most concerned about charging obviously
Small fridge and 2kw Eber diesel heater used 20hrs a week max winter time

The MPPT is more efficient when its cold ?
not bothered about the extra cost, I want to avoid running the engine to charge, no shore power

 

[Richard10002]

You won't be getting any power worth speaking about in winter, PWM or MPPT, and definitely not with only 120W panel.

I have 100W into a PWM controller, which doesn't to do much even in summer, so I'm going to add 2x245W panels into a 40A Tracer MPPT controller, in the hope of getting something meaningful.

 

[Sneds]

Now I'm getting a little nearer understanding what this thread is about ��.
;-)

 

[Bigplumbs]

Quite. I think it is better to have a SIWATAB that would do the job