Restaurants are one type of culinary business that requires an electricity supply to support daily operations. Electricity is needed to power various facilities, ranging from air conditioning (AC) systems, lighting, kitchen equipment, refrigerators, freezers, to cashier devices and digital ordering systems.
A restaurant's electricity consumption depends on its business scale, menu types, kitchen capacity, number of customers, and operating hours. Restaurants with commercial kitchens and large food storage facilities generally have higher energy requirements.
Electricity availability is essential because power outages can disrupt cooking processes, affect food storage, and interfere with customer service. These issues can significantly impact a restaurant's reputation.
On the other hand, electricity costs are one of the operational expenses that need to be managed effectively. One solution to improve energy efficiency while reducing dependence on the main electricity grid is installing a Solar Power Plant (PLTS).
By harnessing solar energy, restaurants can generate their own electricity to support various operational needs. Its implementation can be tailored to the building's capacity, electricity consumption patterns, and the restaurant's operational characteristics.
This article explores the implementation of solar power systems in restaurants, their benefits, available system types, and installation procedures. Here is the complete explanation!
What Is a Solar Power System for Restaurants?
A solar power system for restaurants is an electricity generation system that harnesses solar energy through solar panels to generate electricity for culinary business operations. This includes supporting kitchen operations, front-office activities, warehouses, and other facilities.
Solar panels can be installed in various locations, such as restaurant rooftops, parking canopies, or designated areas that meet technical and safety requirements.
The electricity generated by a solar power system can support various restaurant operations, including:
- Air conditioning (AC) systems.
- Lighting in dining areas and kitchens.
- Electric kitchen equipment.
- Refrigerators and freezers for food storage.
- Coffee machines and beverage preparation equipment.
- Cash registers and Point of Sale (POS) devices.
- Computers and digital ordering systems.
- Kitchen ventilation and exhaust systems.
- Other supporting electrical equipment.
The capacity and configuration of a solar power system must be adjusted to each restaurant's electricity requirements. A small restaurant with a few kitchen appliances has a different energy consumption profile compared to a large restaurant with a commercial kitchen, spacious dining areas, and multiple refrigeration units.
Solar power systems can serve as an additional energy source to help reduce electricity consumption from PLN. However, these systems do not automatically provide backup electricity during power outages. This capability requires a specific configuration, such as an inverter that supports backup operation and battery storage.
Why Should Restaurants Use Solar Power Systems?
Installing a solar power system offers several benefits for restaurants in terms of cost efficiency, energy resilience, and environmental management. Here are some reasons why this technology is worth considering.
1. Reducing Operational Costs
Restaurants require electricity to operate various facilities, ranging from kitchen equipment to air conditioning systems.
The use of AC units, refrigerators, freezers, coffee machines, lighting, and electric cooking appliances makes electricity one of the restaurant's recurring operational expenses.
By installing a solar power system, restaurants can utilize electricity generated by solar panels during the day to meet some of their energy requirements.
This can help reduce electricity purchases from PLN, particularly for restaurants that operate from morning until afternoon.
The better the alignment between solar power generation and the restaurant's electricity consumption profile, the greater the opportunity to utilize solar electricity directly.
The amount of potential savings depends on the solar system's capacity, electricity consumption patterns, electricity tariffs, investment costs, and applicable electricity export-import regulations.
2. Reducing Carbon Emissions
Restaurant operations require a certain amount of energy to run kitchens, cooling systems, and various supporting facilities.
Electricity generated from fossil fuel-based power plants also contributes to greenhouse gas emissions.
Solar power systems generate electricity without burning fuel during operation. Therefore, utilizing solar energy can help reduce indirect emissions associated with a restaurant's electricity consumption.
Installing solar power systems can also become part of a culinary business's efforts to implement the concept of a sustainable restaurant.
3. Supporting Restaurant Energy Resilience
Electricity availability is essential for maintaining smooth restaurant operations.
Power outages can interrupt kitchen equipment, disrupt cashier systems, and affect the performance of refrigerators and freezers used to store food ingredients.
Solar power systems can support energy resilience by providing an additional electricity source and reducing dependence on the main grid at certain times.
When equipped with batteries and an appropriate energy management system, solar power systems can also be designed to supply selected electrical loads during PLN grid outages.
For example, a backup system can be designed to support emergency lighting, cashier devices, or specific refrigeration equipment, depending on battery and inverter capacity.
However, this capability must be ensured through proper system planning. Standard on-grid solar power systems do not automatically continue operating when the PLN grid experiences a power outage.
4. Supporting the Sustainable Restaurant Concept
The concept of a sustainable restaurant is becoming increasingly relevant in the culinary industry. This concept encompasses various efforts to minimize the environmental impact of restaurant operations.
Implementation can include improving energy efficiency, managing food waste, reducing single-use plastic consumption, and utilizing renewable energy sources.
Installing a solar power system can be one practical step toward achieving these goals.
In addition to environmental benefits, utilizing solar energy can become part of a restaurant's brand identity, demonstrating its commitment to sustainability.
5. Improving Restaurant Image and Appeal
Adopting environmentally friendly technology can provide added value when building a restaurant's image among customers.
Restaurants that demonstrate a commitment to energy efficiency and sustainability can establish a unique selling point amid competition in the culinary industry.
This commitment can also be communicated through marketing materials, social media, and information displayed within the restaurant.
Nevertheless, solar power utilization should be part of a broader sustainability initiative rather than merely a branding strategy.
Types of Solar Power Systems Suitable for Restaurants
There are three types of solar power systems that restaurants can consider: on-grid, off-grid, and hybrid systems. The selection should take into account energy requirements, operating hours, electricity grid conditions, and the existing electrical installation.
1. On-Grid Solar Power System
An on-grid solar power system is a solar electricity generation system connected to the main electricity grid, such as the PLN network.
During the day, solar panels generate electricity that can be used directly to meet the restaurant's operational needs. If solar power generation is insufficient, the remaining electricity demand is supplied by PLN.
Meanwhile, if solar power generation exceeds instantaneous consumption, the utilization of excess electricity depends on the system configuration and applicable regulations.
On-grid solar power systems generally do not provide backup electricity when the PLN grid experiences an outage. Standard grid-connected inverters typically stop operating during power outages for safety and grid protection purposes.
This system is suitable for restaurants looking to reduce electricity consumption from PLN, particularly during the daytime, without using batteries as part of the solar installation.
2. Off-Grid Solar Power System
An off-grid solar power system is a solar electricity generation system that operates independently without being connected to the main electricity grid.
The electricity generated by solar panels can be used directly and stored in batteries for later use when solar power generation is insufficient, such as at night.
This system can be considered for restaurants located in areas with limited access to electricity grids or locations where grid connections are unavailable.
However, implementing an off-grid system requires careful planning of solar panel capacity, battery storage, and backup power sources.
Restaurants operate various energy-intensive appliances, including AC units, freezers, refrigerators, and kitchen equipment. Therefore, system capacity must be calculated based on total energy consumption and peak power requirements.
3. Hybrid Solar Power System
A hybrid solar power system combines solar power generation, the PLN electricity grid, and battery storage in one integrated system.
During the day, electricity generated by solar panels can be used to meet the building's energy requirements. Excess energy that meets charging conditions can be stored in batteries and utilized when solar power generation decreases or when the system requires additional power from the batteries.
Hybrid systems offer greater flexibility in energy management because they can regulate electricity consumption from multiple sources based on system configuration and operational requirements.
For restaurants, this system can be considered as part of an energy-saving strategy while improving electricity supply resilience.
For example, batteries can be configured to support cashier equipment, lighting, administrative systems, or specific refrigeration units during PLN grid outages.
However, the ability to provide electricity during a PLN outage must be ensured through a system design that supports backup operation. This includes load separation, inverter capacity, and appropriate power transfer equipment.
Steps for Installing Solar Power Systems in Restaurants
Installing a solar power system in a restaurant requires structured planning and implementation. The objective is to ensure that the system operates optimally without disrupting business activities and customer services.
Here are the general steps involved in installing a solar power system in a restaurant.
1. Site Assessment and Energy Audit
The technical team conducts a site survey and evaluates the restaurant's energy requirements. This process includes analyzing electricity bills, energy consumption patterns, rooftop or land conditions, electrical panel capacity, and potential solar energy generation.
At this stage, the electricity requirements of each facility must be identified, including kitchen equipment, AC units, refrigerators, freezers, and cashier devices.
2. System Design and Planning
The survey results are used to determine the solar power system's capacity, system type, inverter configuration, battery requirements if necessary, and integration with the existing electrical installation.
At this stage, the restaurant's energy consumption profile must be considered, including differences in electricity demand during food preparation, lunch hours, and dinner hours.
3. Permits and Approvals
The project manager reviews licensing requirements, solar power system technical regulations, necessary approvals, and coordination with the electricity grid operator based on the selected installation scheme.
4. Procurement and Delivery
Solar panels, inverters, mounting systems, cables, protection devices, batteries, and other components are prepared according to the design specifications.
Component selection should consider product quality, technical compatibility, warranty availability, and ease of maintenance.
5. Mounting System Installation
The panel support structure is installed on the designated rooftop or land area. The installation must consider structural strength, weather resistance, and building safety.
6. Solar Panel Installation
Solar panels are installed according to the planned layout to ensure optimal sunlight exposure while allowing sufficient access for maintenance activities.
7. Electrical Wiring and Inverter Setup
Solar panels are connected to the inverter and electrical installation through appropriate protection devices.
If the system uses batteries, the installation also includes the energy storage system and battery management components.
8. System Testing and Commissioning
The technical team conducts tests to evaluate panel performance, inverter operation, protection systems, electrical connections, and integration with the grid and batteries, if available.
The testing process must also ensure that the system operates according to the planned configuration.
9. Final Inspection
Once the system has passed the required testing procedures, a final inspection, documentation, and handover process are conducted.
At this stage, restaurant management must also receive information regarding system operation, safety procedures, and troubleshooting guidelines.
10. Monitoring and Solar Power System Maintenance
Electricity generation monitoring and routine maintenance are carried out to maintain system performance.
Inspections include checking solar panel cleanliness, cable conditions, inverters, batteries, and protection devices. Monitoring also helps detect reduced energy production or installation issues.
All installation stages must be coordinated with restaurant management. If the restaurant continues operating during installation, the work schedule should be arranged to avoid disrupting kitchen activities and customer services.
Examples of Solar Power System Applications in Restaurants
Solar power systems can be implemented in restaurants through several approaches, depending on available space and electricity requirements.
1. Rooftop Solar Power Systems
Restaurant rooftops are one of the areas that can be utilized for solar panel installation. This area can generate electricity without requiring additional land.
Before installation, the rooftop structure, potential shading from surrounding buildings, maintenance access, and measures to prevent roof leakage must be evaluated.
This application is suitable for restaurants with sufficient rooftop space and adequate sunlight exposure.
2. Solar Power Systems on Parking Canopies
Parking canopies equipped with solar panels can function as vehicle shelters while generating electricity.
This approach can be considered by restaurants with relatively large parking areas. The electricity generated can help meet the building's energy requirements or support electric vehicle charging facilities if the system is specifically designed for that purpose.
3. Solar Power Systems with Battery Storage
Restaurants that require greater flexibility in energy management can consider solar power systems equipped with batteries.
Battery storage allows solar energy generated during the day to be used at a different time.
In systems designed for backup operation, batteries can also support selected electrical loads when the main grid experiences an outage.
For example, stored energy can be allocated to support lighting, cashier equipment, administrative systems, or specific refrigeration units, depending on system capacity and design.
However, storage capacity and backup duration must be calculated based on electrical load requirements, the targeted backup period, and system capabilities. Using batteries does not automatically guarantee that all restaurant facilities will continue receiving electricity during a power outage.
Factors to Consider Before Installing Solar Power Systems in Restaurants
Before deciding to install a solar power system, restaurant owners should consider several important factors.
1. Electricity Consumption Profile
Every restaurant has a different electricity consumption pattern.
Restaurants with commercial kitchens, multiple refrigerators, and extensive AC usage have different energy requirements compared to small cafés or restaurants with outdoor dining concepts.
Therefore, evaluating the electricity consumption profile is essential for determining the appropriate solar power system capacity.
2. Restaurant Operating Hours
Operating hours are one of the important factors in determining the type and capacity of a solar power system.
Restaurants operating from morning until afternoon have greater opportunities to utilize solar electricity directly because their operating hours coincide with peak solar power generation periods.
Meanwhile, restaurants that are busier at night may need to consider energy storage or a combination with PLN electricity supply.
3. Electrical System Reliability
Power outages can affect various restaurant activities, from cooking processes to food storage.
Refrigerators and freezers require particular attention because prolonged power interruptions can affect food quality and potentially cause financial losses due to spoiled food and beverages.
Solar power system integration must be designed according to priority load requirements. Standard on-grid systems should not be relied upon as backup electricity sources during PLN outages.
4. Available Installation Space
Rooftop area, building structural conditions, parking spaces, and potential shading determine the number of solar panels that can be installed.
A technical survey is necessary to ensure that the designated area is suitable for installation and will not interfere with the building's functions.
For restaurants located in shophouses or shopping centers, permission to use rooftops and installation areas must also be considered.
5. Investment and Savings Calculations
Solar power investment should be evaluated based on installation costs, estimated energy generation, maintenance expenses, component lifespans, and potential electricity bill savings.
With realistic calculations, restaurant owners can estimate the investment payback period and determine the most suitable procurement scheme.
6. Kitchen Equipment Characteristics
Not all kitchen appliances have the same electricity requirements. Some equipment has relatively high power consumption and starting power requirements.
Therefore, solar power system planning must consider the types of equipment used, total installed power, and the possibility of multiple appliances operating simultaneously.
This evaluation is important for determining inverter capacity and preventing mismatches between system capabilities and restaurant operational requirements.
Examples of Solar Power System Applications in the Restaurant and Culinary Industry
Solar energy utilization in the food and beverage industry can be implemented through various approaches, ranging from rooftop solar panel installations to integration with energy storage systems.
Restaurants with large building areas, high electricity consumption, and daytime operations have opportunities to utilize solar power generation directly.
Meanwhile, restaurants operating until nighttime can consider hybrid systems if they require greater energy management flexibility.
Solar power systems can also be adapted to various business scales, ranging from independent restaurants, cafés, and local eateries to restaurant chains with multiple branches.
By conducting energy audits and site surveys, business owners can identify the potential for solar panel utilization and determine the system capacity that best suits each location's requirements.
Examples of Solar Power System Installations in Restaurants in Indonesia
One example of solar power system implementation in the Indonesian restaurant industry is Kopi Kenangan. (Reference: https://www.tribunnews.com/bisnis/2022/05/29/usung-konsep-hijau-perusahaan-startup-implementasikan-instalasi-plts-atap)
Consult Batari Energy for Solar Power System Installation in Your Restaurants!
Installing a solar power system in a restaurant requires careful planning because it involves energy efficiency, operational costs, and the smooth running of culinary business activities.
By conducting a site survey and electricity consumption analysis beforehand, restaurant owners can determine the most suitable system capacity and type based on building conditions and operational patterns.
Batari Energy provides consultation and site survey services to assist with solar power system installation planning based on project requirements. The planning stage can be used to evaluate solar panel installation potential, system capacity requirements, and potential energy savings.
Batari Energy also provides on-grid, off-grid, and hybrid solar power system installation services, including solutions for restaurants.
For more information about solar power system installation for restaurants, you can contact the Batari Energy team via WhatsApp. Batari Energy provides solar power installation services for various building and facility requirements, including restaurants.
Click this link to consult with Batari Energy about your restaurant's solar power requirements!