How can restaurants reduce fuel costs?

The most effective approach is a hybrid kitchen: use rocket stoves for bulk cooking (rice, sambar, curries) and keep LPG only for quick frying. This cuts total fuel costs by 50 to 70 percent.

Are rocket stoves energy efficient enough for a restaurant?

Yes. SGE Fabs rocket stoves achieve 35 to 50 percent thermal efficiency, 3 to 4 times better than traditional firewood stoves. They deliver heat comparable to gas burners at a fraction of the fuel cost.

What is the cheapest way to cook in a restaurant?

Firewood in a rocket stove is the cheapest fuel per meal in most of India. A rocket stove extracts maximum heat from minimum fuel, making it more economical than LPG, kerosene or electricity for bulk cooking.

Energy Efficient Cooking Solutions for Restaurants

For most restaurants, fuel is the third or fourth largest expense after rent, raw materials and staff. It is also the expense that owners pay the least attention to. The gas cylinder gets delivered, the bill gets paid, and nobody tracks how much fuel is actually going into each dish versus being wasted.

We have worked with restaurant owners across Tamil Nadu who have cut their fuel costs by 40 to 60 percent without changing their menu, reducing their output, or compromising food quality. Here is what works.

Understand Where Your Fuel Goes

In a typical south Indian restaurant, fuel consumption breaks down roughly like this:

40-50%: Rice and grain cooking (boiling large volumes of water)
20-30%: Sambar, rasam, dal and curries (sustained simmering)
15-20%: Frying, tadka and tava work (quick, high-heat bursts)
5-10%: Water heating, tea/coffee and miscellaneous

The first two categories, rice and curries, account for 60 to 80 percent of fuel use. They also happen to be the categories where a rocket stove outperforms or matches gas at a fraction of the cost.

Strategy 1: The Hybrid Kitchen

Move rice, sambar, rasam, dal and bulk curries to a rocket stove. Keep LPG for dosa tava, quick frying and dishes that need instant flame control. This is the single highest-impact change you can make.

A restaurant owner in RS Puram, Coimbatore made this switch with one SGE Fabs 15 kg rocket stove. His monthly LPG consumption dropped from 5 cylinders to 2 cylinders. Monthly fuel cost went from Rs 9,000 to about Rs 5,500 (including firewood).

Strategy 2: Fuel Quality Control

Whether you use gas or firewood, fuel quality matters. For firewood users:

Use only properly dried wood. Wet wood wastes 30 to 40 percent of its energy evaporating water instead of producing cooking heat.
Store firewood in a dry, covered area. Moisture from rain or humidity reduces efficiency.
Cut wood to the right size for your stove's fuel feed opening. Pieces that are too large waste fuel because they do not burn completely.

Strategy 3: Right-Size Your Equipment

Using a large burner for a small pot wastes fuel. Heat escapes around the sides of the vessel. Match your stove size to your vessel size. If you are heating a 5-litre pot, you do not need a burner designed for a 40-litre vessel.

Strategy 4: Batch Cooking

Heating up a stove takes fuel. Keeping it at operating temperature takes less. If you can batch your cooking so the stove stays hot for one extended session rather than heating up and cooling down multiple times, you save fuel.

Our restaurant customers who plan their cooking schedule around the rocket stove report better fuel efficiency than those who fire it up and shut it down multiple times a day.

The Numbers That Matter

Here is a realistic monthly fuel cost comparison for a small restaurant serving 100 to 150 meals per day:

All LPG: Rs 10,000 to Rs 15,000 per month
Hybrid (rocket stove + reduced LPG): Rs 4,000 to Rs 7,000 per month
Annual savings: Rs 50,000 to Rs 90,000

The SGE Fabs rocket stove costs Rs 6,500. It pays for itself within the first month. Every month after that is pure savings.