Mensejahterakan Rakyat dengan Listrik?

Seberapa besar konsumsi listrik mempengaruhi pertumbuhan ekonomi?

Pertumbuhan listrik mendorong pertumbuhan ekonomi untuk negara maju, menengah, dan berkembang.

Jadi kita bisa ambil 2 kesimpulan, yaitu

Satu, data ini menunjukkan bahwa Indonesia sebagai negara berkembang sebaiknya memperbesar suplai listrik, karena efeknya ke pertumbuhan ekonomi hampir 4x lipat daripada negara maju.

Dua, seiring dengan adanya listrik, industri dapat menghasilkan lebih banyak produk dalam negeri, sehingga ini memutar roda ekonomi bagi rakyat.

Apalagi ini adalah kausalitas dua arah, yang artinya pertumbuhan ekonomi juga menaikkan konsumsi listrik, yang kemudian akan kembali menumbuhkan ekonomi itu sendiri.

Kausalitas dua arah, pertumbuhan listrik dan pertumbuhan ekonomi.

Jadi, saya kira strategi pemerintah dengan program 35 gigawatt nya sudah sangat tepat, dan kita tunggu hari, dimana masyarakat kita kuat, dimana masyarakat kita bahagia, dimana masyarakat kita sejahtera.

Salam tenaga surya.

Cafe | What If Tenaga Surya? EP #1

Setiap bulan, seorang pemilik cafe pusing melihat besarnya tagihan PLN dari coffee maker, AC, chiller, speaker, dan lighting.

Tapi di sisi lain, seorang pemilik cafe tidak bisa mematikan coffee maker begitu saja karena masih ada pesanan customer, tidak bisa mematikan AC karena customer bisa pergi karena kepanasan, dan tidak bisa mematikan chiller karena susu dan frozen food akan basi.

Apakah tidak ada cara lain untuk menghemat biaya listrik, tanpa menolak customer?

Bagaimana jika biaya listrik bisa dihemat sebesar 40% dengan panel surya?

Pasang panel surya untuk menghemat biaya listrik sebesar 40%

Atap cafe cukup untuk pasang panel surya 13400 Wp

Apalagi, bukankah ini era milenial dimana publik semakin anti dengan produk yang tidak ramah lingkungan seperti kantong plastik? Kenapa tidak memberikan sebuah experience baru untuk customer?

Misalnya, customer itu melihat di dinding ada sebuah angka digital yang bertambah setiap detiknya. Ternyata, itu adalah polusi karbon yang berhasil dicegah sebagai kontribusi cafe terhadap lingkungan. Sembari menunggu kopi, jari jempol bergerak ke TikTok dan Instagram untuk memposting experience ini ke followernya. Setelah itu, kopi datang dan customer itu dapat menikmati secangkir kopi yang setiap tetesnya dibrewing dengan energi hijau dari panel surya ramah lingkungan.

Jadi, pemilik cafe dapat menghilangkan ketakutan saat melihat tagihan PLN karena sekarang ada penghematan biaya listrik sebesar 40%, sekaligus mendapatkan customer baru via word of mouth dengan experience baru.

Rp 0 Solar Energy Partnership Program

Solar energy (“tenaga surya” or “PLTS”) is growing worldwide. LOreal, Intel, Amazon, IKEA, Apple, and many others are using solar energy to power their operations. (See Exhibit 1.)

With Rp 0 investment

The question is: why is solar energy not growing in Indonesia?

To answer this, imagine you are a manager. One day, someone offered you solar panels costing hundreds million up to billions Rupiah.

What would your boss say?
Furthermore, if this fails, wouldn’t you be risking your career?
Therefore, isn’t the root cause the giant investment cost?

To solve this problem, Inspecro welcomes companies to join our Rp 0 Solar Energy Partnership Program. This means, you are not paying anything (free) to start using solar panels. No debt that risks company in bankruptcy either.

So, how would this benefit you?

Benefits of Rp 0 Solar Energy Partnership Program

Benefit 1 – Cheaper Electricity

With Rp 0 investment, you immediately get access to electricity that is 10% cheaper than PLN for each kWh of energy. (See Exhibit 2.)

With Rp 0 Solar Energy Partnership, you can get solar energy (tenaga surya / PLTS) that is 10% cheaper than PLN.

Benefit 2 – Employee Passive Income

Directors, staffs, and employees may support this cause to earn passive income. Hence, this heightens the sense of belonging. Furthermore, they can earn investment return 3x of bank deposit.

Benefit 3 – Free Green Branding + Carbon Profits

With solar energy, you are contributing to the environment via reduction of carbon emission. However, why would this affect company’s profits?

A research by Boston Consulting Group shows that 37% of millennial purchase products associated to a higher cause. Thus, to assist you, we share a Green Energy Certificate which you can use as your green marketing campaign. (See Exhibit 3.)

Green Energy Certificate - Rp 0 Solar Energy Partnership (Tenaga Surya / PLTS)

Moreover, with the verification on amount of carbon emission saved:

  • You can claim tax deduction; or
  • You can sell your carbon savings to other companies meeting carbon goals.

This aligns with Indonesia’s goal to lower carbon emissions by 29% by 2030 in accordance to Paris Agreement.


Therefore, for Rp 0 investment, you immediately get:

  • Cheaper electricity via solar energy (tenaga surya / PLTS)
  • Passive income for your employees
  • Free green branding + carbon profits

So, isn’t this a great way to contribute to your company, without risking your career?

You can request to join this partnership via:
[email protected]
+62 81 9333 73789

Inspecro is registered and regulated by Financial Services Authority of Republic of Indonesia (OJK) with registration number S-166/MS.72/2019.

Solar Energy for Home: Case Study

A homeowner in Jakarta was interested in solar energy / PLTS, but only as his new “toy”. However, when I visited the client’s home, I noticed large electricity usage: lights, fridge, AC, water heater. Could you imagine the electricity costs?

In solving this problem, Inspecro considered a PLTS system to save his costs. Before deciding whether solar energy is a great fit for the client or not, we had to answer 3 core questions:

  1. Is the sun strong enough in the client’s roof?
  2. Is the client’s roof suitable for solar panels?
  3. Will I add any value to the client? (not as a “toy”)

Question 1: Is the sun strong enough in the client’s roof?

We measured the sun radiation profile at the client’s roof. The client’s home has a strong sun radiation of 4.76 kWh/m² day. This is 73% stronger than a house in Berlin, in which solar panels are already widespread. (See Exhibit 1.)

Question 2: Is the client’s roof suitable for solar panels?

We took measurements and mapped roof obstacles. Next, we created two possible design options using guidelines from AS/NZS Standards. (See Exhibit 2.)

To decide which option is more profitable for the client, we asked about the client’s daily lifestyle. Using this information, we chose the smaller option as it better fits the electricity usage pattern.

Question 3: Will I add any value to the client?

Assisted by our NASA solar database, we forecast electricity savings of Rp 1.4 million per month on average. Slight variations occur between months due to panel positioning and sun revolution angles. (See Exhibit 3.)

However, is PLTS more profitable than saving in a bank?

If solar earns less “interest rate”, then there is no point for the client to go forward with solar. To address this issue, we compared the return on both investments. (See Exhibit 4.)

After discussing 3 core questions above, what is your own conclusion?

Hotel Solar Energy: Case Study (Pembangkit Listrik Tenaga Surya / PLTS)

A 3-star hotel consulted us Inspecro when they faced large electricity costs. Meanwhile, they could not reduce electricity usage any further:

  • Sacrificing cooling units would make guests uncomfortable by heat.
  • Reducing water heating would shock guests in cold evening showers.
  • Darkening lighting would destroy the hotel appearance in the eyes of the guests.
  • Hotel has no control over guests using fridge and TV in the guest rooms.

The hotel concluded that to maintain guests comfort would require the same electricity consumption. Then, how could the hotel save electricity costs? Hence, we proposed electricity cost savings with solar energy (or Pembangkit Listrik Tenaga Surya / PLTS).

Here, the manager asked us these 3 questions:

  1. How much are PLTS’s monthly cost savings?
  2. What is PLTS’s lifetime profit?
  3. Is PLTS reliable for 25 years?

A. Monthly Cost Savings

The 64.6 kWp PLTS saves Rp 8.8 millions per month on average. (See Exhibit 1.)

PLTS electricity cost savings in Inspecro hotel case study.

How did we get these numbers?

The solar panels or “panel surya” produces 8.5 MWh of electricity per month on average, after losses such as soiling, clouds / nighttime, and wiring loss. (See Exhibit 2.)

PLTS energy production in Inspecro hotel case study

Next, using 2018 PLN tariff (IDR 1035 per kWh for golongan B3), we can calculate our cost savings: Net Energy x 2018 PLN tariff.

For example, in September:
Cost savings (September) = 9830 kWh x IDR 1035 per kWh
Cost savings (September) = IDR 10.2 millions

Over the year, the hotel saves IDR 106 millions of electricity cost. However, is this saving profitable compared to the initial investment?

B. Lifetime Profit

With cost savings of IDR 106 millions per year, the PLTS generates lifetime profit of IDR 2.6 billions to IDR 7.5 billions. (See Exhibit 3.)

Inspecro delivers a PLTS with a long-term profit

To determine whether PLTS is the most profitable investment, the hotel’s finance team asked about the ROI. (See Exhibit 4.)

Inspecro delivers PLTS with ROI of 15% to 22% per year

But the analysis above assumes 25 years of operation. The manager asked, “How can we be sure that the PLTS would not break down in just 10 years?”. Great question.

C. Reliability

The system is 100% reliable, due to globally known brands, certifications, installation standards, 24/7 online monitoring, and warranty.

Globally known brands. Local brands are not yet proven. Therefore, we use Canadian Solar panels and SMA inverters for this project. (See Exhibit 5.)

Inspecro uses Canadian Solar panels and SMA inverters

Certifications. Ssolar panels are certified with ISO9001, ISO14001, IEC 61215, CEC listed, and UNI 9177.

Installation standards. Inspecro follows Australian / New Zealand Standards (AS/NZS) for absolute safety procedures of the hotel’s solar energy system.

After-sales services. Unlike other installers cleaning their hands after you pay them, Inspecro commits to 24/7 online monitoring and warranty:

  • 24/7 online monitoring. Inspecro and the hotel may observe the system 24/7 via an internet connection. Therefore, if there is any issue, it shall be solved immediately.
  • Warranty. The solar panels have 25 years linear power output warranty.

What were the hotel’s conclusions?

D. Conclusions

The hotel concluded that:

  1. They must not sacrifice electricity usage, otherwise guests will become uncomfortable by feeling hot, showering in cold water, or seeing a gloomy lighted hotel lobby.
  2. PLTS solves their electricity costs by saving Rp 8.8 millions per month on average.
  3. As an investment, PLTS generates profit of Rp 2.6 billions to Rp 7.5 billions over the long-term, with ROI of 15% – 22% per year, depending on PLN tariff growth rate.
  4. PLTS is risk-free with lifetime of 25 years or more. Meanwhile, the system break evens at 6 years. Therefore, solar energy is free for 19 years or more.

If you are a hotel manager facing the same problem, consult with us for free:

[email protected]

2 Types of Solar Cells: Monocrystalline vs Polycrystalline

“Monocrystalline? Polycrystalline? Which one should I go for?”

Yes, these might seem overwhelming to you. Let us compare them in Performance, Cost, and Aesthetics.


In solar cells, performance is measured in terms of efficiency. In other words, how much sun energy is converted into electricity. Here, monocrystallines are better than polycrystallines (25% vs 21%). This is because a polycrystalline has crystal boundaries stopping “carriers” like electrons which generate electricity. Therefore for the same area, a polycrystalline generate less electricity.

Verdict: if you have tight roofs/spaces, you should go for monocrystallines


However, monocrystalline cells are more difficult to manufacture. Consequently, polycrystalline cells are much cheaper. This is why polycrystalline cells dominate solar installations today.

Verdict: if you have wide roofs/spaces + want to be economical, you should go for polycrystallines

3. Aesthetics

A monocrystalline cell is solid black in colour, while a polycrystalline cell is blue with some "cracks"

A monocrystalline cell is solid black in colour, while a polycrystalline cell is dark blue with some “cracks”. If you really care about having a stylish roof, then the solid black colour in mono would be a good choice as it blends nicely on your roofs. Otherwise, the polycrystalline’s dark blue is not too ugly either as the “cracks” will not be visible after few meters away.

Verdict: monocrystallines black colour might be more stylish, but it depends on your taste


  • Monocrystalline cells are for you if you have small roofs/spaces, or if you care about being stylish
  • Polycrystalline cells are more economical and therefore they are more widely used in installations

Next, you might want to know how we install these cells in a project study.

Investing in Solar Crowdfunding

Solar energy is growing by 28% annually ¹. Therefore, solar is an attractive investing opportunity. However, building a solar plant normally costs hundreds of thousands or more.

“So, do I have to be a heir to a conglomerate to invest in solar projects?”

The answer is no.

But, how?

1. What is solar crowdfunding investing?

Solar crowdfunding raises small amounts of funds from a large number of people, in order to build a solar energy plant.

A solar crowdfunding platform connects Investors, Consumers, and Installers:

Solar crowdfunding investing platform connects Investors, Consumers, and Installers

2. How does solar crowdfunding investing work?

First, Investors may order any number of solar cells for an open project:

In solar crowdfunding investing, Investors first invest in a Consumer's solar plant by ordering solar cells.

Then, the Investors get return on investment for the energy productions:

In solar crowdfunding investing, Consumers pays monthly fees to Investors based on its solar energy production.


3. Is solar crowdfunding investing safe?

It depends to which platform provider you are investing in.

For example, Inspecro enforces transparency and risk management:

  1. Revealing all project contracts.
  2. Revealing all engineering and economics studies for each project.
  3. Tying the monthly income to the size of energy production in real time.
  4. Appointing Installers to cover technical risks by engineering, design, components manufacturing, and installation. ²
  5. Appointing Consumers to cover theft, loss, damage, and destruction. ³
  6. Helping to arrange site visits for Investors to see their solar cells physically.

Learn more about open projects to participate in solar crowdfunding.

4 Reasons of Going Solar Now in Indonesia

Solar revolution is a rapid disruption. We are seeing 31% annual growth of solar.¹ Similarly, big companies worldwide are going solar. (See Exhibit 1.) For example, Apple has installed 101 MW of solar. This is enough to power around 40,000 houses. Target, a giant department store retailer in the United States, has installed twice as much solar. Likewise, other big brands such as General Motors, LOreal, FedEx, Intel, Amazon, IKEA, and Walmart are following behind. If are unsure on how to react, our report shows the benefits of going solar. (See Exhibit 2.)

1. Electricity savings

Common misconception is that green investments do not bring visible profits. However, solar includes return on investment from energy savings. Electricity price is increasing by 12.8% per year. (See Exhibit 3.) Therefore, installing solar may become a hedging against this risk. As a result, solar projects may experience up to 20% IRR (internal rate of return.) (See Case Study: A Clothing Manufacturer in Central Java, Indonesia)

2. Environment

Global warming is a widespread topic. If this continues, we may see the temperature rising by 4°C in the next 200 years.³ Likewise, Greenland lost 281 billions tons of ice per year.⁴ A major cause of this issue is CO2 emission from conventional energy sources, such as coal. By comparison, solar emits significantly less CO2. (See Exhibit 4.)

3. Regulation alignment

Kepmen ESDM 1567 K/21/MEM/2018. Indonesian Ministry of Energy and Mineral Resources supports the adoption of renewable energy while aiming to avoid the reliance on conventional energy sources.

Peraturan Direksi PT. PLN 0733.K/DIR/2013. Indonesian government has instructed State Electricity Company (PT. PLN) to allow “energy export.” Basically, it allows building owners to sell their solar energy surplus to PLN. This is a great scheme for solar owners, as their surplus energy production is not wasted when unused.

4. Warranty

Many solar installers simply build the project, then stop caring about it once they get paid. However, Inspecro treats each project as a continuing relationship over its lifetime. Therefore, as long as they are not due to the consumer’s errors or force majeure events, we assist in solving technical related problems during the 25 years of lifetime.

For an example of our work, visit our Case Study.


¹ International Renewable Energy Agency, “Renewable Capacity Statistics 2018,” 2018.

² Extrapolated from the temperature increasing by 1°C in the last 50 years. NASA, Goddard Institute for Space Studies.

³ NASA, “Ramp-Up in Antarctic Ice Loss Speeds Sea Level Rise,” 2018.

Disruptive Innovation of Solar Energy

1. Defining Disruptive Innovation

What is a disruptive innovation? Disruptive innovation is a term popularized by Clayton Christensen’s widely known book The Innovator’s Dilemma. Christensen pointed that a disruptive innovation delivers currently neglected value metrics which are different from value metrics by mainstream markets. For example, think of Tesla’s automobile value metrics: self-driving and “green”; in contrast with value metrics of traditional automobile: acceleration and top speed.

Hence, is solar energy a disruptive innovation? To answer the big question, let us examine what value metric does the solar energy bring to the table.

2. New Value Metrics of Solar Energy

Mainstream value metrics of the energy sector are:

  • Costs (how cheap is its per kWh of electricity production?)
  • Demand Response (how fast can it satisfy sudden spike in load demand?)

Solar Energy on the other hand, can be used in all parts of the world, including in areas without access to an electricity grid. This new value metric of “location independence” could be observed in off-grid applications globally. (See Exhibit 1.)

Off-Grid Solar PV Capacity increases from 13% of total renewable capacity in 2008, to 41.7% in 2017

Christensen also added that a common pattern of a disruptive innovation is that it would first conquer the new value metric, then proceed to conquer the mainstream value metrics. Hence, our next question is, how is solar PV performing in terms of the mainstream value metrics: costs and demand response?

Mainstream Value Metric 1: Costs

As shown in the graph below, cost of solar PV has been dropping sharply from 0.36 USD/kWh in 2010 to 0.10 USD/kWh in 2017. While solar PV is not the cheapest renewable energy today, it is projected to be the cheapest renewable energy in the near future. This outlook is driven by the 17% annual cost reduction for solar PV while other renewable energy sources are stagnant in costs. (See Exhibit 2.)

Solar PV has experienced 17% annual cost reduction while other renewable energy sources are stagnant in costs

Mainstream Value Metric 2: Demand Response

This is perhaps the area where solar PV is the weakest because its generation is solely reliant on the availability of sunlight, which is not correlated with electricity demand. However, this issue may be mitigated by using a battery storage which can store solar energy and satisfy sudden demand in electricity. In terms of its cost, battery is becoming economical due to the increased productions for electric vehicles batteries, ultimately driving down the learning curve. (See Exhibit 3.)

Energy storage cost has decreased from 1000 USD/kWh in 2010 to 273 USD/kWh in 2016.

3. Conclusion

Solar PV is disruptive due to its new value metric: “location independence”. Additionally, it is getting more competitive in the mainstream value metrics:

  • Cost: Solar PV cost reduces by an average of 17% annually. Continuing its learning curve, solar PV will likely become the cheapest renewable energy source in 2024.
  • Demand Response: Decreasing cost of storage means demand response is more economical as more storage may be deployed in the future.

Therefore, at the point where these two mainstream value metrics reach parity with other energy sources, solar PV disruption will likely proliferate from off-grid applications to on-grid residential and commercial uses. Consequently, utility grids are facing the threat of disruption as consumers defect to solar PV. Unless they find new business models, they will not be able to offset the depreciation costs of installed transmission and distribution systems.

Furthermore, the value metric of “location independence” gives solar the opportunity to rewire our very own capitalism. By solar energy, we can now power decentralized means of productions assisted by IoT and 3D printing. This brings us into the prospect of the solar energy being capable to shift us to a post-capitalism economy.

Learning Curve of Solar Energy

What is a learning curve? Basically, a learning curve describes how a process becomes more efficient as more output is produced. This could be used to predict future cost reduction of solar PV.

1. The Learning Curve

Solar PV is very disruptive to the electricity grid. It is expected to be cheaper by 32.6% for every doubling of installed capacity, based on the learning curve shown in the figure below. As a comparison, the recently trending wind energy is expected to be cheaper by only 15.9% for each doubling of capacity.

Learning Curve of Solar PV and Wind Energy, 2010 to 2017

2. Solar PV Cost Forecast

Assuming there are no unfavorable policies or drastic changes to business models of utility grids, solar PV cumulative capacity is projected to increase to 1,213 GW in 2024 as shown in the figure below. Under the learning curve relationship, solar PV cost is expected to fall to 0.05 USD/kWh.

On the other hand, the price of hydro energy being the cheapest renewable energy, has seemed to be stagnant at 0.05 USD/kWh since 2010. Furthermore, other forms of renewable energy have much weaker learning curves compared to solar PV. Therefore, these developments suggest that in the current trend, solar PV will likely become the cheapest renewable energy in 2024.