PV Self Consumption Optimization with Battery Storage

Overview

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Self-Consumption Optimization

The abundant power from the sun is commercially attractive as solar PV continues to be the cheapest means to produce electricity. However, on an almost daily basis, your industrial solar PV production is much higher than the local consumption. At this point, excess electricity is typically fed into the public grid.

This mismatch between PV production profile and load consumption profile means that often cheaply produced electricity is fed into the grid during peak production hours and expensive electricity has to be bought from the grid during peak load hours. As the feed-in tariffs continue to go down and more and more distributed energy sources connect to the grid, the grid operators may choose to deny feed-in completely.

Save Energy, Save Costs

Generally, only about 30% of the electricity produced by solar PV is consumed by local loads. The rest are either fed to the grid at low cost or curtailed because there is no usage.

Lithium-ion battery storage for industrial PV is the perfect solution to:

maximize the production from your PV
increase self-consumption
decrease your dependence and consumption from the expensive grid
perform peak-shaving to reduce grid connectionfees
and even buy cheap electricity from the grid anduse it later when the prices rise

During your peak energy consumption hours, utilise the energy stored in the battery from your industrial solar PV system. Save energy in the battery when PV production is high and consumption is low. As you increase the self-consumption from solar PV, you need less and less power from the utility, reducing your energy bills as well as dependency on the grid. The flexibility of HISbatt storage systems and HIS-EMS enables you to combine use cases. For example, you can also use stored energy to perform peak shaving and reduce demand charges significantly.

There are also many subsidy programs available for commercial and industrial users to get to help reduce their carbon footprint and bring their businesses to their next phase.

Get the most from your battery storage

Li-Ion BESS is multi-purpose and generates multiple streams of revenue. Get the most out of your battery storage system for peak shaving by using it to:

Peakshaving makes sense for you?

Other Applications

Consider that your business has a peak power that occurs only intermittently. For example, when multiple employees are charging their electric cars while an essential heavy load is operating. For this example, let’s assume some numbers:

100 MWh / year

Annual energy consumption

100 kWp

Solar PV installed

200 kW

Peak Power

Typical low voltage connection limit is 150 kW. Therefore, to ensure 200 kW for your business during peak hours, you have two options:

1. Request a medium voltage connection

2. Disconnect non-critical loads if power consumption > 150 kW

A better and more sustainable solution is to install battery storage that can provide peak shaving of at least 50 kW and ensure optimal and continuous operation of your business. Furthermore, you are protected from high demand charges by reducing peak loads, saving thousands of euros on your electricity bill.

Another aspect is the underutilization of the solar PV. A 100 kWp rooftop solar PV will generate about 100 MWh of energy annually. However, due to different in the load curve of your business and the production curve of your installed PV, a typical business will use only about 35% of the generated power. The rest must be exported to the grid, or curtailed. As feed-in rates continue to decline, exporting energy to the grid becomes less financially viable.

The untapped and unused energy from PV can be used to charge the battery storage and be supplied at a later stage, reducing further the consumed kWh from the grid as well. HIS recommends installing a battery capacity with a ratio of 1.4 to 1.6 with respect to total MWh generated by solar PV.

For our example, as per HIS recommendations, installing a 140 kWh battery storage would double the self-consumption of PV from 35% to 70%! Considering the average demand charges and consumption charges over the past two years, we can expect:

Peak shaving / Demand charges costs savings: ≥ 5000 EUR
Consumption costs savings: ≥ 7000 EUR. PV feeds an additional 35 MWh annually to business directly.

Considering CAPEX and OPEX for an All-in-One 150 kWh lithium-ion battery storage, the expected ROI is 4 to 5 years. All with worry-free and reliable power right at your fingertips!

Related Products

Interested in peak shaving and more for your business? Check our Plug-and-Play battery solutions with air and
liquid cooled batteries.

HISbatt-233L

HISbatt-215A

Applications and Usage Scenarios

Peak Shaving

Shave offload peaks for your commercial or industrial business with reliable battery energy storage systems.

PV Self Consumption Optimization

Store excess energy from your solar panels to increase PV self-consumption and decrease dependence on the expensive grid for an efficient power storage system.

E-Mobility

Maximize the revenue from your Fast EV charging infrastructure by integrating smart energy storage solutions.

Emergency / Backup Power

Ensure reliable uninterruptible power supply for your critical sensitive load using our robust BESS solution for energy management system

Time of Use

Use our smart state-of-the-art EMS to optimize energy consumption by charging during off-peak hours.

Multi Use application

Maximize ROI by combining multiple applications, such as PV self-consumption, peak shaving, and forecast-based charging.

Peak Shaving

Shave off load peaks for your commercial or industrial business with reliable battery storage.