Ultra Energy

03/04/2026

Happy Easter to all.

17/03/2026

16kW Sigenergy.

Power.

Independence.

Renewable.

Herholdt's Group

27/02/2026

Take the step to power independence.
Herholdt's Group
Ultra Energy

27/02/2026

Herholdt's Group partnering for success!

🌍 Proven Success – Real Case Studies

✅ 1 MWh SigenStack in Belgium

A real-world example of how SigenStack solved storage challenges in limited
space with a modular, flexible design, reducing footprint, speeding up
installation, and overcoming traditional system limitations.

✅ 20 MWh Commercial Project in Bulgaria

Sigenergy’s modular commercial and industrial storage solution went live,
powering a large renewable system, proving the platform performs at true
utility scale.

✅ The President Hotel in Cape Town,
South Africa

A flagship commercial hospitality installation in Bantry Bay, demonstrating how
Sigenergy supports high-demand environments with intelligent load management,
energy cost optimisation, and uninterrupted power for guests even during grid
instability.

✅ Residential and Commercial
Installations in South Africa

Across the country, Sigenergy systems are actively installed in homes and
businesses, tackling unreliable supply while delivering reliable backup power
energy savings, and scalability.

27/02/2026

Thank to all our South Coast and National Customers for your continued support.

We are not going anywhere and continue to strive to provide bespoke quality solar installations. Watch this space!

As we are a Herholdt's Group Premium Partner we are able to offer the best deals on the best PV equipment available.

Give us a call anytime to look at your solar requirements.

24/02/2026

Great support from our suppliers allows us to complete projects on time and with excellent results..keeping our clients in business..
Herholdt's Group Premium Partner
Ultra Energy

24/02/2026

120kW Sigenergy Gateway makes installations simpler and saves time!

Key Features and Capabilities

120 kW Power Capacity:
Designed for high-demand industrial scenarios with a three-phase output of 120 kW.

0 ms Backup Switching: Provides uninterruptible power by switching to battery/generator power in 0 ms, ensuring zero disruption to sensitive, high-power loads.

Multiple Inverter Support:
Supports the connection of up to 6 SigenStor inverters in a single system, allowing for flexible, scalable power solutions.

Generator & Load Control: Integrates with diesel generators for extended power supply and includes 2-wire start functionality.

Advanced Safety Features:
Features 350 ms reverse power flow protection for the grid and generator, and includes a built-in bypass circuit for enhanced reliability.

Robust Design:
IP54-rated with an operating temperature range of -30°C to 55°C, making it suitable for various environmental conditions.

Intelligent Monitoring: Facilitates 24/7 monitoring and energy flow control via the mySigen App, allowing for real-time tracking.

Compact & Lightweight: Features a durable aluminum structure, with dimensions of 850 x 1152 x 305 mm and a weight of 74 kg.


Herholdt's Group
Ultra Energy

23/02/2026

Sigenergy Loading......

Herholdt's Group

23/02/2026

Herholdt's Group Sungrow
Our installer Sydney busy installing a Sungrow as a grid tied solution for a client with an existing battery inverter.
Seamless integration assisted in timeous completion.

11/02/2026

Herholdt's Group

🤔 What is BESS? Let’s simplify.

⚡🔋A Battery Energy Storage System, or BESS, is a smart battery that stores electricity from solar panels or the grid so you can use it when you need it most.

With Eenovance BESS, your panels don’t just generate power; they store, balance, and make it work for you. 💪

Smart, efficient, reliable. That’s solar the Eenovance way.

👉 https://herholdts.co.za/ps193/bi0/eenovance/

03/09/2025

Powered by Sigenergy installed by Ultra Energy.