GivEnergy vs Tesla Powerwall: An Installer's Honest Comparison
At ALPS Electrical, we install both GivEnergy and Tesla battery storage systems every week. Customers frequently ask which is better, and the honest answer is that it depends entirely on your priorities, budget and what you want the system to do. Both are excellent products from reputable manufacturers.
This comparison is based on our hands-on installation experience and the real-world feedback we receive from customers living with both systems.
Capacity and Sizing
The Tesla Powerwall 3 comes in a single 13.5 kWh size. You can stack up to three units for 40.5 kWh total, but there is no smaller option. The GivEnergy Gen 3 battery is available in 5.2 kWh and 9.5 kWh modules, which can be stacked for larger capacities. This modular approach gives GivEnergy an advantage if you want a smaller system to start with and the option to expand later.
For most households, 9.5-13.5 kWh of storage is sufficient to capture a full day of surplus solar generation and discharge it through the evening and overnight. If your electricity usage is lower, the GivEnergy 5.2 kWh unit at a lower cost may be all you need.
Inverter Integration
The Powerwall 3 has a built-in solar inverter that handles up to 11.5 kW of solar input. This means you do not need a separate inverter, which simplifies installation and reduces the total component count. GivEnergy uses a separate hybrid inverter (the Gen 3 inverter), which connects to both the solar panels and the battery. While this adds a component, it offers more flexibility in system design.
Whole-Home Backup
This is where the Tesla Powerwall 3 with Backup Gateway genuinely excels. During a grid power cut, the Powerwall seamlessly takes over the entire home electricity supply within milliseconds. You would not even notice the lights flicker. GivEnergy offers an EPS (Emergency Power Supply) function that backs up selected circuits, but it does not provide the same seamless whole-home backup as the Tesla system.
If power cut resilience is a priority for you, the Tesla Powerwall is the stronger choice.
App Experience
The Tesla app is polished and intuitive, with real-time energy flow animations, Storm Watch, and clear historical data. The GivEnergy portal and app have improved significantly and now offer excellent monitoring, scheduling and tariff integration. GivEnergy also has an open API, which appeals to technically minded users who want to build custom automations and integrations.
Both apps allow you to set charge and discharge schedules for time-of-use tariff arbitrage. Both integrate with Octopus Energy tariffs. The Tesla app has a slight edge in user experience polish, while GivEnergy offers more granular control and customisation.
Price Comparison
The GivEnergy Gen 3 system (hybrid inverter plus 9.5 kWh battery) typically costs £4,500-£6,500 fully installed. The Tesla Powerwall 3 with Backup Gateway typically costs £9,000-£12,000 fully installed. When comparing like-for-like on a cost-per-kWh-stored basis, GivEnergy is significantly more affordable.
However, the Tesla price includes the built-in inverter and backup gateway. If you add a separate solar inverter to the GivEnergy system and factor in the EPS unit for backup, the price gap narrows, though GivEnergy remains the more budget-friendly option.
Warranty
Tesla offers a 10-year warranty on the Powerwall 3. GivEnergy provides a 12-year warranty on Gen 3 batteries. Both warranties guarantee a minimum retained capacity (typically 70-80%) by the end of the warranty period. GivEnergy's longer warranty is a genuine advantage.
Installation Experience
From our perspective as installers who fit both systems regularly, each has its advantages during installation. The Tesla Powerwall 3 is a single unit that mounts on the wall with the inverter built in, making for a cleaner installation with fewer components. However, Tesla's commissioning process requires internet connectivity and their app-based configuration can occasionally be slow if the Tesla servers are busy.
The GivEnergy system involves mounting a separate inverter and battery, which takes slightly longer but offers more flexibility in positioning. The GivEnergy commissioning process is straightforward and does not depend on external servers. Both systems require a competent electrician for safe installation and connection to your consumer unit.
Smart Tariff Integration
Both systems integrate well with time-of-use tariffs from Octopus Energy and other suppliers. Tesla's Powerwall can be configured for time-based control through the Tesla app, automatically charging from the grid during cheap overnight periods and discharging during expensive peak times. GivEnergy offers similar functionality through its portal, and many users praise the granular control available through the GivEnergy scheduling system. Both systems can save an additional £300-600 per year through tariff arbitrage alone, even in months with minimal solar generation.
Our Recommendation
- Choose Tesla Powerwall 3 if: You want whole-home backup, the best app experience, or you are already in the Tesla ecosystem.
- Choose GivEnergy Gen 3 if: Budget is important, you want flexible sizing, a longer warranty, or you prefer open API access for custom integrations.
Both systems deliver excellent performance and will significantly reduce your electricity bills. We are happy to discuss your specific requirements and recommend the best system for your situation. Get in touch for a free consultation.