Pure sine wave inverter /ups

[Lupus]

Any idea how noisy that device is?

Would I be able to put in a bedroom cupboard and not have it disturb me with beeps and excessive fan noise?

I'd probably run it with the supplied batteries and when those are shot replace with Hubble S120 drop-in's (assuming it's compatible)

If it's like the 1500w the fan only kicks in every 20 minutes while charging for about 5 minutes it can be loud but not 20A Mecer loud. While on battery it's pretty much the same, the 2000w kicks in every hour or so for about ten minutes, but the fan is like a PC fan being on. The 2000w does have it's fan on while running on battery and it's on par with the Mecer fan for that.
In comparison to the Mecer which has a rather loud fan even on 10A while charging or while on battery the Eccos 1500w are quieter, only needing to cool every so often. So I'd say the 1000 is probably the same as the 1500?