Huawei SUN2000-(2KTL-6KTL)-L1

Reporting back:

I enabled off-grid mode in the settings. First nothing happened. Then I opened the grid breaker and received "AC interruption" and "No communication to Backup Box" errors. So I thought it wouldn't work without a Backup Box as I originally posted. But then I selected "Island Grid" in the Grid Code and suddenly it falls into Off-grid operation mode and voila, lights are on. Grid breaker is still open.

I now notice a lot more noise coming from the inverter. I am not surprised since it's now become the grid forming component, setting voltage and frequency. So more load on the electronics. I think it will also heat up more.

I guess I will keep running like this to monitor what's going on. At the end of the day, it won't change anything for me financially as also in on-grid operation I wasn't needing any energy from the grid since my battery never drops below 60% at night until sunrise. So I might eventually go back to grid tied if it's less strain on the inverter (which I think it is).

But it's good to know that I don't need to buy a Huawei Backup Box (which is like 400-500&#;) if I want to cancel my utility contract and go off-grid in the future.

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Huawei has a reputation as a leader in communication and mobile technology, but it&#;s not well-known that the company is a global powerhouse for solar technology. Building on decades of experience in large-scale commercial and utility solar, Huawei jumped into the residential solar market in with an efficient, lightweight hybrid solar inverter offering an impressive range of features at a competitive price. Then, only two years later, Huawei released the second generation residential hybrid inverter, a new compact optimiser, a range of 3-phase hybrid, and large commercial inverters with advanced capabilities.

Company background

Huawei pronounced &#;Hua-Way&#; is a Chinese communications and technology company mainly known for its mobile phones. The company ranks 44th in the Fortune Global 500, and operates in more than 170 countries and regions, with over 197,000 employees. Huawei has staggering research and development capability, with 53.4% of the workforce dedicated to R&D and ranks 3rd in the EU Industrial R&D Investment Scoreboard.

Huawei has a strong foothold in the global PV market. According to reports released by IHS Markit and Wood Mackenzie, Huawei has been ranked No. 1 in global inverter shipment for six consecutive years since , accounting for 23% of the worldwide market in . Interestingly, they only build string solar inverters, not central inverters, and believe string technology is superior, becoming the industry trend due to improved monitoring and less costly maintenance.

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