thaipatanakitgirl

You can always start with no back up and see how it goes...and then if you need it it should be easy enough to install especially if you plan now put in an extra wire run or two if this would be a problem later etc. etc. If all 4 of the people are addicted to really hot showers you might consider a larger tank...but that can be done later too if the one you've got now proves to be too small so be sure to build the tank support/foundation a bit bigger and sturdier in the event......

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Chownah,I am fairly sure the system Steve is referring to is the non-electric self contained unit which mounts directly flat on the roof.

I was told from solar wave that their 300 liter is 70000 baht. They have a less expensive one but we have to have special structure on the roof and the less expensive one is not flat on the roof. It's lifted.

70 k sounded to expensive for me.

We're getting ready to build a house far enough away from other houses that we'll have to buy our own transformer. The local electric authority says the smallest transformer is 30 KVA single phase and wants an astonishing 170,000 baht for it and it's installation on a couple of poles. But in their price breakdown they list a 1,000 baht charge to check out the installation. This makes me think that they're not doing it themselves but are hiring a contractor and then going in behind him to check it out. If so, maybe it'd be possible, and cheaper, to try to find and hire a contractor directly and then pay the electric authority to connect it. Has anyone tried this or know of a company in Udon that could do this?