The device it self is well robust. It has DIPs for proper setup. Also support for a remote indicators and charging switch. Cable connection is easy. It could be 5 stars, but unfortunately it is NOT pure sine wave. Frequency is unstable. From 0Hz to +100Hz, that means when running, it will destroy everything without protection, usually small appliances, night light, charger, fan,... radio clock will not show properly, some PCs will reset when even 20ms should be enough. And ya, there is lousy support, or no support at all.
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