Does unplugging appliances really save?

Yes but modestly. Standby power (set-top boxes, chargers, a clock-display microwave) is small but runs 24/7; across a home it can be tens of baht a month. A switched power strip makes it easy — but the effect is far smaller than cutting the AC.

Does setting the AC to 26°C really save?

Yes — each degree higher cuts the AC's consumption by roughly 5–10% as the compressor runs less. At 26°C with a fan you feel about as cool as 24°C but save more, and cleaning the filter regularly keeps it from overworking.

Do old fridges use more — should I replace it?

Old fridges usually use more than new label-No.5/inverter models, especially with a worn door seal or leaking refrigerant. But replacing purely to save may not pay off immediately; replace when the old one starts failing or cooling poorly, then pick high-star No.5. Meanwhile, cleaning the rear coils and checking the door seal helps.

Why is the summer bill higher every year?

In summer the AC works harder to reject more heat, so it uses more than other months even at the same setting; heavier use can also push you into pricier tiers (home rates cost more per unit as you use more), plus the Ft charge that adjusts each period. See why the bill is expensive.

How much does WFH add, and how to cut it?

It depends on how many hours the AC runs and what devices you use; the main add is all-day AC (not the computer). To cut it: cool only the workroom, set 26°C + a fan, close curtains, use a laptop over a desktop, and switch the AC off when you step out — focusing on the AC beats saving on the computer.

Electricity User Guide

How to Save on Your Home Bill — Worked Out in Real Baht

Name: CapSolar
Address: 429/44 Sukhonthasawat Rd, Lat Phrao, Bangkok, 10230, TH
Telephone: +66 2 124 5414
Price range: $$$$

Where to start saving, how many baht cutting the AC really saves, whether label-No.5 pays off, whether behaviour or new equipment helps more, and how to tame a summer/WFH spike — all worked out in baht, not just 'turn off the lights'.

9 min readLast updated: 23 Aug 2026Sources as of: MEA/PEA/EGAT, Aug 2026

The way to actually cut a home bill is to start with the biggest consumers first — air-con, water heater, fridge, washer/dryer — because trimming 10% off the AC beats switching off many lights all month. This page works out in baht roughly how much each change saves per month, using a round ~4 THB/unit for easy math (the real bill is tiered + Ft + VAT — see the latest rate at how many baht per unit).

Where should I start saving on my home bill?

Start with what draws the most power, not the light bulbs. In a typical AC-using home the big consumers usually rank AC > water heater > fridge > washer/dryer > water pump. The table below is an illustrative estimate (at ~4 THB/unit with assumed hours) so you can see where cutting pays off most — real figures depend on the model, hours used and the tiered rate.

Appliance	Typical power	Example usage	Est. baht/month
AC 12,000 BTU	~1,200 W (1.2 kW)	8 h/day	~1,150 THB
Water heater	~3,500–4,500 W	~15 min/person/day	~120–250 THB/person
Fridge	~70–150 W (runs 24 h)	24 h	~150–350 THB
Clothes dryer	~2,000–3,000 W	1 h × 8/month	~80–100 THB
Lighting (all-LED home)	~100–200 W total	5 h/day	~60–120 THB

Clearly the AC and water heater dominate, so cutting those two pays off more than chasing light bulbs. To compute the whole tiered bill see how to calculate your bill, and for per-appliance detail see electricity cost by appliance.

How do I save on air-con, and how much is it in baht?

The AC is the No.1 consumer in most homes. Free, effective moves: set 26°C instead of 22°C (each degree up saves roughly 5–10%), run a fan so you feel cool at a higher setpoint, clean the filter/unit regularly, and use the timer. Example: a 12,000 BTU AC costing ~1,150 THB/month, cut 15%, saves about 170 THB/month with no new equipment.

For the full AC calculation from BTU → watts → units → baht with a table for every size, see how much does AC cost; for the water heater (another top consumer) see water-heater running cost.

Is switching to label-No.5 appliances really worth it?

Worth it for appliances used hard and long (AC, fridge, washer), because the daily saving repays the price gap. EGAT's new label-No.5 shows 1–5 stars — more stars, more saving. But replacing a still-good old unit just to save power may not pay off if it's lightly used. Best rule: upgrade when you'd be buying anyway, and pick high stars in the heavy-use categories.

The 'baht saved per year' figure is printed on each unit's EGAT label — compare model-to-model when buying. For the per-unit rate used in the real math see how many baht per unit.

Behaviour or new equipment — which helps more?

Do both, but start with behaviour because it's free and shows up in next month's bill (26°C, unplug idle devices, line-dry instead of tumble-dry, iron in one batch). Equipment (label-No.5, LED, inverter AC) is an investment with a longer payback. The best route: squeeze behaviour fully first, then invest in replacing only the heavy consumers when they're due.

Summer / work-from-home bill spiking — how do I cut it?

In summer the AC works harder to reject more heat, and heavier use pushes you into pricier tiers; WFH means AC + devices all day. To cut it: cool only the room you use, close curtains against the sun, set 26°C + a fan, clean the AC before the hot season, and use a laptop over a desktop when you can. If you're in a dorm/condo charged above the utility rate, saving units pays even more — see how dorm bills are calculated.

Cut your home bill in 7 steps (checklist)

Ordered from biggest impact to smallest; most cost nothing and start now.

1) Tackle the AC first
Set 26°C, add a fan, switch off when you leave, use the timer, and clean the filter — the No.1 consumer, so this pays most.
2) Trim water-heating
Shorter showers, a sensible temperature, switch off when unused — a water heater draws a lot per hour.
3) Ease the fridge's load
Give it a gap from the wall, open it less, don't overpack it, set a sensible temperature, and check the door seal.
4) Line-dry instead of tumble-dry
Dryers and irons draw a lot; line-dry when you can and iron in one batch to avoid repeated warm-ups.
5) Unplug idle devices
Set-top boxes, chargers, a microwave showing a clock draw a little standby power around the clock; a switched power strip helps.
6) Switch to LED bulbs
LEDs use far less than incandescent/halogen and last longer; swap the longest-on bulbs first for a quick payback.
7) Measure against the real bill
Record the units each month and compare; if the bill suddenly jumps, check for leakage or a meter error at why the bill is abnormally high.

How much can rooftop solar cut a home bill?

Once behaviour and equipment are maxed out but the bill is still high (especially daytime-heavy homes), rooftop solar generates power for you during the day to cut the units you buy from the grid. The payback depends on your usage pattern and system size, and surplus can be sold back under the program — see selling power back / Solar Phak Prachachon. If heavy load also trips your breaker, see breaker keeps tripping.

About this guide

Written by the CapSolar team, a commercial-solar provider in Thailand, reviewed by Frank Lee (Founder). Saving advice follows the tips pages of the MEA, SafeSaveThai (PEA) and EGAT's label-No.5, access-verified as of Aug 2026 (links below). The baht figures here are estimates using a round ~4 THB/unit for clarity; the real rate is tiered and changes each period — see the latest on the per-unit page.

FAQ

Tackle the biggest consumers first — in an AC home that's the air-con and water heater. Setting 26°C + a fan and trimming water-heating move the bill far more than switching off lights, because those two dominate a home's usage.

Saved all you can but the bill's still high?

For daytime-heavy homes, buildings and factories, CapSolar assesses free whether solar pays off — a quick chat on LINE.

Talk to CapSolar (free)or call +66 2 124 5414

How to Save on Your Home Bill — Worked Out in Real Baht

Where should I start saving on my home bill?

How do I save on air-con, and how much is it in baht?

Is switching to label-No.5 appliances really worth it?

Behaviour or new equipment — which helps more?

Summer / work-from-home bill spiking — how do I cut it?

Cut your home bill in 7 steps (checklist)

1) Tackle the AC first

2) Trim water-heating

3) Ease the fridge's load

4) Line-dry instead of tumble-dry

5) Unplug idle devices

6) Switch to LED bulbs

7) Measure against the real bill

How much can rooftop solar cut a home bill?

About this guide

FAQ

Related articles

How much does AC cost

Cost by appliance

Calculate your bill

Why the bill is high

Saved all you can but the bill's still high?