I have a solar cell charging a 12v battery via a maplin TPS 1230 solar charge regulator. By using some basic instrumentation and some simple maths (i.e. measuring the current and voltage on the input & output and multiplying to produce a figure for power) I determined that I wasn't getting as much power out of the system as I thought I should.
Having read-up on the subject, I believe this might be due to the solar charger being a PWM type - not very efficient. I've just ordered what claims to be a MPPT solar charge regulator (much more efficient). listing here
After placing the order I did a little more reading (yes, I know, I got this the wrong way round!) and discovered that apparently many cheap MPPT charge regulators from china aren't really MPPT after all - just PWM chargers with a different label.
When my order arrives, is there any way of telling if it really is MPPT or not?