Otso

Complete energy solutions

Battery and solar solutions that reduce costs and increase independence.

We design and install systems from residential solar setups to large-scale solar parks for businesses. We can add battery storage, EV charging, and heating & cooling to deliver a complete turnkey solution.

Clear project plan and documentation: steps, assumptions, and scope
Tailored to your consumption: real habits and realistic yield
Focused on savings and control: solar, battery, charging, climate
Storage

Battery solutions tailored to your needs

A battery is not just an add-on. When sized correctly, it increases self-consumption, reduces peak loads, and provides backup readiness. We select the right solution based on your consumption profile and goals.

Increase self-consumption and reduce grid purchases
Limit peak loads for smoother, more stable usage
Frequency market readiness, if it fits your profile
Risen container battery solution
Risen all-in-one battery cabinet
Risen outdoor battery cabinet
Risen battery modules
Residential

Residential solar parks

A complete energy solution that reduces costs and increases independence. Solar as the primary source, battery storage for flexibility, and smart control for optimization.

Battery and backup readiness based on your consumption
Smart control to maximize self-consumption
Heating & cooling paired with solar
Residential solar system
Industrial

Industrial solar parks

Large-scale solutions for companies and production sites. Rooftop or ground-mounted parks, grid solutions, and full documentation.

Rooftops: loads, mounting, and documentation
Ground-mounted parks: planning and grid connection
Real-time monitoring and reporting
Industrial solar parks
Core revenue

Frequency market — a key revenue stream

The frequency market can generate real recurring revenue. With the right system, you can actively earn from grid balancing services. We help set up and optimize a reliable solution.

A real income stream from grid balancing
Clear fit assessment and optimal configuration
Reliable automation without interruptions
Frequency market solution

Integrated solutions

Energy solutions that create real value

Everything in one place. Solar, storage, charging, and climate control working together so your everyday energy use becomes smart and efficient.

Solar systems

We design and install solar systems for homes and businesses. We optimize the layout for your roof and ensure maximum performance.

  • Tailored design and engineering
  • Quality panels and inverters
  • Professional installation and warranty

Energy storage

Battery systems that store your solar energy and let you use it when you need it most. More independence and peace of mind.

  • Store daytime energy for evenings
  • Backup power during outages
  • Smart energy management

EV charging

Charging solutions integrated with your solar system. Charge your car with solar power and significantly reduce fuel costs.

  • Smart chargers for home and business
  • Solar system integration
  • Load balancing

Heating & cooling

Heat pumps and air conditioning optimized to work alongside solar. Comfort all year with minimal running costs.

  • Efficient heat pumps
  • Heating and cooling in one
  • Optimized for solar

A simple, transparent process

How we work together

Our goal is to make the entire journey as easy and clear as possible. From the first contact to commissioning, you stay informed at every step.

  1. 1

    Consultation and assessment

    We start with a thorough discussion about your needs and opportunities. We analyze your energy consumption, site suitability, and your goals.

  2. 2

    Tailored solution and proposal

    We create a personalized solution and a detailed quote. We explain every component, the scope of work, and the expected result.

  3. 3

    Professional installation

    Our experienced team delivers a careful, clean installation. We follow all standards and keep you informed throughout the work.

  4. 4

    Commissioning and support

    We configure the system for optimal performance and guide you through usage. We provide ongoing support and maintenance so your system keeps performing at its best.

Why choose us

Your benefit is our priority

We deliver a complete service where every detail is considered. Our goal is to build a solution that serves you reliably for years.

Quality and accountability

We use proven components from recognized manufacturers. We provide strong warranties and stand behind our work.

A complete turnkey solution

We handle everything: design, installation, configuration, and maintenance. No coordination headaches with multiple subcontractors.

Transparent communication

We keep things honest and easy to understand. Each step is clearly communicated and you can always ask if anything is unclear.

Ongoing support

Our relationship does not end after installation. We provide continuous support, maintenance, and guidance for long-term performance.

Customer experience

What our clients say

We are proud of our customers’ trust. Their feedback motivates us to keep improving every day.

⭐⭐⭐⭐⭐

"A highly professional approach from start to finish. The proposal was detailed and clear, the installation was fast and high-quality. The system has been running for six months and has exceeded our expectations. Strongly recommended!"

Mati Tamm Homeowner, Tallinn
8 kW solar system + battery
⭐⭐⭐⭐⭐

"A 50 kW solar system with a charging solution was installed for our business. The process was smooth, the team was flexible, and they followed the agreed timeline. Our electricity costs have dropped noticeably and the investment is paying back faster than we expected."

Karin Lepik Company director
50 kW solar park + chargers
⭐⭐⭐⭐⭐

"At first I was skeptical whether a solar system would be efficient enough for us. The consultant took the time to explain everything thoroughly and address my doubts. Now I’m more than satisfied — the system is intuitive, monitoring is easy, and support is always quick."

Priit Kask Townhouse owner, Tartu
5 kW solar system

Answers to your questions

Frequently asked questions

We have collected the most common questions and answers to help you decide with confidence. If anything remains unclear, feel free to contact us.

Request a Quote

Get a Free Quote

Fill in the form and you’ll receive a clear estimate within 24 hours, including the solution overview, equipment selection, and assumptions.

Interest