December 2021

4 hidden costs of fragmented monitoring of renewable energy​

Picture of Hendrik Broering

Hendrik Broering

Co-founder and CPO, AMMP Technologies

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PV and battery storage markets around the globe are on the rise. There is an increasing number of companies owning or operating large energy portfolios.

A key characteristic of these portfolios is that they consist of:

a) A variety of different system technologies (PV, metering, batteries, etc.)
b) Technologies by various OEMs (SolarEdge, Huawei, SMA, Fronius, Delta, SunGrow, etc.)
c) Varying use cases (captive power, net metering, leasing, PPAs, community solar, etc.)

Due to this diversity across portfolios, many operators end up with fragmented monitoring of their systems. This often involves making use of multiple OEM monitoring portals. Since these portals are quite distinct, we will call them “operational data silos” going forward.

An owner or operator of a portfolio of 50 energy systems typically deals with at least 10 data silos. Any addition of new systems or technologies increases this number further. Such a fragmented situation comes with downsides that are often overlooked. Four of these hidden costs are presented below.


You are likely to miss the signal in the noise

If operational data is spread over many data silos, it is difficult to extract the most important information or connect the dots. An operator monitoring batteries, PV, and consumption separately, will eventually miss performance issues.

They will miss unexpected changes in customer consumption, unwanted grid feed-in, or unplanned solar curtailments.

Having several data silos typically also means dealing with multiple different notification systems. Operators need to juggle all notifications that might not be useful in isolation. A lot of them only make sense if combined intelligently.


Your reporting is very cumbersome

Owners and operators must create reports for internal and external stakeholders. Most of the reporting is done regularly; e.g. on a daily, weekly, or monthly basis.

Finance teams need the latest energy data for billing purposes. Engineers need performance overviews. Management needs to know whether energy production meets expectations and forecasts. Investors want confidence in the company’s execution. End customers want to see accurate overviews of their consumption and their savings.

If operational data is distributed across multiple silos, gathering the underlying data takes a long time.

Reporting involves the following steps:
  1. Logging into every monitoring portal in use (sometimes for each system separately)
  2. Searching for the required data and, if possible, downloading a CSV export for the relevant period. Sometimes this involves multiple downloads per system.
  3. Modifying that data in Excel to make it compatible with data from other sources
  4. Combining data with tariffs for billing or savings calculations
  5. Formatting the data and saving the final report (Excel, PDF, etc.)
  6. Distributing the result to the right internal or external stakeholders
  7. Doing this again for every new reporting cycle.

The above focuses on scheduled reports. However, ad-hoc reports are also often required for decision-making. For example, management might request an overview of solar curtailment across all systems. These types of questions require days to answer. This is a big waste of human time and involves a high risk of error.

The team could do amazing work if they were not busy laboring over Excel sheets.

New investors do not take you seriously

In the past, investors in renewable projects focused on the “low hanging fruit” in the market: they invested in a small number of large-scale projects. Meanwhile, sub-megawatt projects were of little interest. However, PV costs came down and new financing instruments emerged. Portfolios of medium-sized PV systems are attracting strong investor interest.

Most investors have realized the problems associated with fragmented PV portfolio management. They now demand centralized asset management as part of their technical due diligence. Increasingly often, they even expect access to the monitoring software  as part of their oversight needs. This is impossible if you operate with data silos.


Your team does not speak a common language

Many people within the organization rely on operational data. Multiple silos of operational data and the corresponding handover of data through Excel sheets across the organization pose two important risks: 

  1. No shared source of truth: The colleague who is responsible for calculating customer savings uses a different set of energy readings than the colleague for billing. Different departments create their own data silos on top of the operational data. This leads to uncertainty as to which dataset is the right one. Such inconsistencies will pile up and are almost impossible to trace down subsequently.

  2. Introduction of bottlenecks and single points of failure: Creating any kind of report is extremely cumbersome. At some point, the system operator has an “expert” for each report, who knows the ins and outs of each data silo. This person knows how to create the right report. However, what happens when they leave the company?

The main takeaway

The energy world becomes increasingly decentralized. Large portfolios of energy systems emerge. These systems need to be operated from a technical and a commercial perspective. Owners and operators should make conscious and informed decisions on how they want to set up their operational data. Not thinking this through will lead to data silos. This situation comes at costs that should not be underestimated.