I have an earlier 300w version of your inverter but not sure if it is soft start. How would I find that out and what's the difference? I assume the inverter is on permanently when the fridge in use? I looked at a Subcold Eco 100 which will fit if suitable, any suggestions.
It will say so on the front, soft start means it wont kick out on start up with the fridges motor load, I have a switch 12v heavy duty in line and can turn the inverter off when not required, all my gear is a permanent fix.
You will require the soft start for electric motors, I to have a 300 soft start but fitted the 600 as I have a plug socket of it to run a small tube heater in winter at the back of the van under where the beds are, you do not require a soft start for them, you could do this mod.
This reply may be far too late for the ordinal poster but may be useful for people finding this post at a later date.That's great an exactly as I suspected and the 'Dual leisure battery input' on your Kigass is basically BS! Your 2 leisure batteries are connected in parallel at the Kigass so your 2 leisure batteries can be viewed as simply 1 large leisure battery from now on.
As mentioned in the previous post ignore the solar input at the Kigass.
Connect your solar panel to your new MPPT controller and take the output of the MPPT to your 'large leisure battery' wherever it's most convenient. I'm thinking this will probably be at the leisure battery input to the Kigass but connecting directly to either of your leisure batteries will work and in this case I suggest you tie the 2 leisure batteries together in parallel directly at the batteries with some heavy-ish cable around 10mm sq which will be simple enough if they are close together. This will reduce voltage level differences between the 2 batteries due to resistance in the wiring between the batteries and Kigass.
A word of warning, a lot of cheap solar controllers advertised as MPPT are not MPPT and are cheap PWM designs and hence wont give you any benefit over the inbuilt solar controller in your Kigass. Double check the advert description and manual and if it mentions 'PWM' anywhere then avoid it, this won't give 100% guarantee of being MPPT unfortunately but it will go a long way in sorting out the wheat from the chaff.
Not sure about anything just ask
Merl
It will say soft on it or in booklet, you will require a bigger unit, i had to go to 600w which in fact is a true 450 constant, must are way over rated.
That's interesting, looks like they superseded your Mk1 with a simpler device!
Adam Welch has done a ton of videos on MPPT controllers. The one that springs to mind that someone in the comments said was badged Spark looked like the image below.
