MPPT or PWM solar controller?

**austastar** · 23rd January 2019, 03:57 PM

Hi,
Yep, precision is wasted effort. 10 or 20 degrees out makes such little difference it is of academic interest only.
Even on a house it is cheaper to put in extra panels facing East or West to catch the lower sun than to put in the mechanics to track the sun.
Cheers

**p38arover** · 29th January 2019, 12:49 PM

Jaycar had a clearance sale on over the last weekend.

I dropped in to buy a simple voltage switch kit ($7.50 vs usual $25) and noticed they had an MPPT Controller kit marked down from $140 to $80. When I asked at the checkout, the priced was halved to $40 - so I bought it. It's a design from Silicon Chip magazine - meaning I can probably repair it should it fail.

**weeds** · 29th January 2019, 12:54 PM

Originally Posted by p38arover

Jaycar had a clearance sale on over the last weekend.

I dropped in to buy a simple voltage switch kit ($7.50 vs usual $25) and noticed they had an MPPT Controller kit marked down from $140 to $80. When I asked at the checkout, the priced was halved to $40 - so I bought it. It's a design from Silicon Chip magazine - meaning I can probably repair it should it fail.

I hope it doesn’t end up in your under thread as failed to work.

**p38arover** · 29th January 2019, 12:56 PM

Sshhhh!

**trout1105** · 24th March 2019, 04:57 AM

I have just bought a couple of MPPT controllers to replace the PWM controllers on my boat and on my Navara and I am wondering what the "Load" connection is used for.

**pop058** · 24th March 2019, 06:47 AM

Originally Posted by trout1105

I have just bought a couple of MPPT controllers to replace the PWM controllers on my boat and on my Navara and I am wondering what the "Load" connection is used for.

Fridge ??

**Red90** · 24th March 2019, 06:47 AM

The stuff using the power.

**trout1105** · 24th March 2019, 07:50 AM

So do i run the fridge/fridges from the batteries or from the load outlet on the MPPT controller?

**Red90** · 24th March 2019, 09:42 AM

Read the instructions.

**101RRS** · 24th March 2019, 10:02 AM

It is just a spot/outlet to run something direct from the solar panels/controller while the sun is still making enough power - is something that is there but never used it - simply easier to let all power from the panels go to the batteries and provide power for you gear from there. If the sky clouds over the batteries still provide a buffer where power at the load point will drop off.

Garry

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