When it comes to growing cannabis indoors in Thailand, one of your biggest ongoing expenses is electricity. Between lighting, air conditioning, fans, and dehumidifiers, your monthly power bill can add up quickly — especially in a 24/7 grow setup.
In this article, we’ll break down how much electricity a 30-plant indoor grow might use, how much that costs in Thailand, and what you can do to keep those bills under control.
Average Electricity Prices in Thailand (2025)
As of early 2025, the residential electricity rate in Thailand is approximately:
- ฿4.15 per kWh (kilowatt-hour)
- Around $0.12 USD per kWh
This rate can vary depending on location, time of day, and whether you’re classified as residential or commercial, but it provides a good baseline for calculations.
Estimating Power Use for a 30-Plant Grow
Let’s look at what’s typically running in a mid-sized grow room with 30 cannabis plants:
✅ Lighting
- 6 LED grow lights @ 300W each = 1.8 kW
- On for ~18 hours/day (veg) or 12 hours/day (flower)
- Daily usage: ~27 kWh/day
- Monthly: ~810 kWh
✅ Air Conditioning (24/7 cooling)
- 2 x 12,000 BTU inverter A/C units
- Average combined draw: 2.2 kW
- Daily usage: ~52.8 kWh/day
- Monthly: ~1,584 kWh
✅ Fans, Dehumidifier, Ventilation
- Combined load: ~600W average
- Daily usage: ~14.4 kWh/day
- Monthly: ~432 kWh
Total Monthly Energy Use
| Device | Estimated Monthly kWh |
| LED Grow Lights | 810 kWh |
| Air Conditioning | 1,584 kWh |
| Fans & Dehumidifiers | 432 kWh |
| Total | ~2,826 kWh |
Monthly Electricity Cost in THB and USD
| Usage | kWh Used | Cost (THB @ ฿4.15/kWh) | Cost (USD @ ฿33.5/USD) |
| Total Monthly | 2,826 kWh | ฿11,725 | ~$350.75 USD |
📌 Estimated Monthly Electricity Bill:
฿11,700–฿12,500 THB (~$340–$375 USD), depending on exact usage and efficiency.
Ways to Reduce Your Grow Room Power Bill
If that sounds steep, here are some energy-saving tips:
🌞 1. Use High-Efficiency LED Lighting
- Go for full-spectrum LEDs with good PAR ratings
- Avoid cheap fixtures with low energy efficiency
❄️ 2. Install Inverter Air Conditioners
- They use less power and run more consistently
- Proper insulation reduces how hard your A/C has to work
⏱️ 3. Automate Your Timing
- Use programmable timers to control lights, fans, and pumps
- Set schedules that align with cooler nighttime hours when possible
💨 4. Optimize Ventilation
- Use variable-speed fans
- Don’t over-ventilate your space (it wastes energy and humidity)
Want to Go Off-Grid?
If you’re considering using solar or wind energy to power your grow, stay tuned — our next post covers the cost of setting up an off-grid power system in Thailand and whether it’s worth the investment.
✅ Final Thoughts
Electricity is a major cost in indoor cannabis cultivation, especially in a hot climate like Thailand’s where cooling is non-negotiable. With a mid-sized grow (30 plants), expect to pay around ฿11,000–฿13,000 per month (or $330–$380 USD) just to keep things powered up — but with smart gear choices and automation, you can bring that down over time.