Safety Concerns with Auto Transformer and Growatt 240V inverter SPF 5000 ES @DavidPozEnergy
Safety Concerns with Auto Transformer and Growatt 240V inverter SPF 5000 ES  @DavidPozEnergy
Uploaded January 2022 | Updated September 2026, 2 days ago
I've received several questions regarding safety concerns about my inverter setup. This video is to answer those questions.

I have two inverters running in parallel. They are Growatt SPF 5000 ES purchased from Signature Solar. Each inverter is 5kW, so combined that's 10kW of power. I've combined it with 30kWh of battery capacity. The batteries I'm using are Gyll (EG4) 48V LiFePO4. This is all part of my off grid solar system running my whole house and garage.

The inverter makes 240VAC single phase. I'm using the auto-transformer from solar-edge to create a neutral. This "splits" the 240V in half, providing me two 120V legs.

Keep in mind, this is a DIY channel. I'm using my equipment off grid. Please be safe for your own setups. Filming and editing this video took place over the course of 2 weeks.

Video Links:

Using the auto-transformer: youtu.be/yWUfvvSa3K8

Making a Powerwall with one inverter: youtu.be/oMH3IwR0ZC8

Affiliate Links:

Growatt 5000W Inverter with 450V MPPT Charge Controller 5000ES: signaturesolar.com/growatt-48v-5kw-450vdc-stackable-off-grid-inverter/?ref=4_rHcgZ9x-TiF-

Auto-Transformer, 5000ES: signaturesolar.com/growatt-5kw-split-phase-transformer/?ref=4_rHcgZ9x-TiF-

EG4 Battery, 48V, 100Ah, 5.12kWh, LiFePO4, Server Rack design: signaturesolar.com/shop-all/batteries/?ref=4_rHcgZ9x-TiF-

Waterproof EG4 battery: 48V LiFePO4 Lithium Battery with Bluetooth, EG4 Brand: signaturesolar.com/eg4-wp-lithium-battery-48v-100ah?ref=4_rHcgZ9x-TiF-

Amazon Affiliate Links:

3- pole circuit breaker: amzn.to/3r9mWkh

“As an Amazon Associate I earn from qualifying purchases.”

Disclaimer:
My videos are in no way intended to be instructional "how-to" lessons. I am simply documenting my project for informational purposes. Property damage, personal injury, or death may result, even when following manufacturer's instructions. I cannot be held liable for such damage or injury. It is YOUR OBLIGATION to ensure that you are complying with any local and federal laws as well as code and permit requirements.

David Poz, LLC
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Safety Concerns with Auto Transformer and Growatt 240V inverter SPF 5000 ES

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