I'm thinking of having solar panels fitted onto the roof of my small house build, how many panels for a smallish build like a 1 bedroom, lounge Bathroom/shower outside kitchen ( some power points ) cost ? installation details. thanks Barramarra.

Got me beat why anyone would want solar heating in Thailand. It does get a bit cool around Christmas in the north , granted.

17 minutes ago, emptypockets said:

Got me beat why anyone would want solar heating in Thailand. It does get a bit cool around Christmas in the north , granted.

Hot water for cleaning?

I don't know anything about solar heating i thought it was a power source for powering the home.

2 hours ago, emptypockets said:

Got me beat why anyone would want solar heating in Thailand. It does get a bit cool around Christmas in the north , granted.

For coffee

3 hours ago, BarraMarra said:

how many panels for a smallish build like a 1 bedroom, lounge Bathroom/shower outside kitchen ( some power points ) cost ?

One A/C running at a time .

Five 600w panels .

3Kw inverter .

All the railings, breakers etc installed and signed off by a certified electrician, less than 100,000 THB .

Adding a battery ? Double the price .

Yeah, not a million miles off.

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And it's worth noting: -

On 6/14/2026 at 10:29 PM, Packer said:

One A/C running at a time .

Five 600w panels .

3Kw inverter .

All the railings, breakers etc installed and signed off by a certified electrician, less than 100,000 THB .

Adding a battery ? Double the price .

At Bht 4 per unit, how long would the a/c need to be used to warrant Bht 100,000 investment?

Size the system by your current MEA/PEA bill, usage. Usage history will be on the bottom of the bill. 5 kW system should be a nice supplement for those no using much electric.

We have an 8kW system, and handles 1000+kWh a month with no problem. Are you home during the day ?

Our usage overnight is minimal, 14 hrs of no real production, and we only use 6-8kWh, and that's with 1 AC running all night. 55" TV would be the other heavy use appliance, but only 100w / hr.

If you want hot water for cleaning buy a black water storage tank and put it in a sunny area. By 10 am it should be plenty hot.

On 6/14/2026 at 6:24 PM, BarraMarra said:

I'm thinking of having solar panels fitted onto the roof of my small house build, how many panels for a smallish build like a 1 bedroom, lounge Bathroom/shower outside kitchen ( some power points ) cost ? installation details. thanks Barramarra.

Depends on your location as factoring Solar requires location, orientation, shading, estimated usage and load requirements and maybe calculations if trying to cool an older house with no ceiling insulation and poorly insulated windows, doors.

Quick method is like someone mentioned take your power and look at peak months usage. If your going to be staying long term than calculate a system that harvests 25% to 35% more energy for runs of cloudy rainy days.

Understand it is an investment. At 4 baht per KWH it will take you a long time to break even

On 6/14/2026 at 10:29 PM, Packer said:

One A/C running at a time .

Five 600w panels .

3Kw inverter .

All the railings, breakers etc installed and signed off by a certified electrician, less than 100,000 THB .

Adding a battery ? Double the price .

Or 20,000bht if you do it yourself.

Setting the break even point at around 18 months.

Edited 25 minutes ago25 min by BritManToo

40 minutes ago, KhunLA said:

Our usage overnight is minimal, 14 hrs of no real production, and we only use 6-8kWh, and that's with 1 AC running all night. 55" TV would be the other heavy use appliance, but only 100w / hr.

No refrigerator at your house?