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Decisions, decisions - New aircon or more solar?


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6 hours ago, Crossy said:

The cheapest 24 SEER I can find with a quick search is 34k Baht (DAIKIN FTKZ12VV2S) the 22k Baht units are around 17-18 SEER.

Be sure to check the SEER for your particular model, as they often quote the best SEER for the entire size range.

 

6 hours ago, Crossy said:

 

So with an assumed saving of 1,500 units per annum (6,750 Baht @ 4.5 per unit). That's a payback of 5 years on energy usage.

In a perfect world, using data provided but the marketing department.

 

6 hours ago, Crossy said:

Adding 330W solar panels at 2,890 Baht a piece (I already have the inverter) would generate roughly 400 units (1,800 Baht @ 4.5 per unit) per year per panel. Payback of 1.6 years on energy generation.

Given your experience this is a reliable number.

 

6 hours ago, Crossy said:

Purely on energy savings there's only one winner, but ...

But at ten years old, the air-con can last another ten years or ten minutes. Probably last another five anyway. bot

 

Combine both in a single project and you can get the payback for both down to three years....

 

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