terrible write performance when almost full

Well, having pretty accurate energy monitors on the boat, our small 6 cubic foot fridge with 1.5 cubic foot freezer, with good insulation for the tropics uses about 6A at 12V when running, and has a 35-50% duty cycle depending on the temp of the air and water. That works out around 864 Watt/Hours a day.

My NV+ v2 with 4x 2Tb Spinpoints in it uses around 3.7 A at 12V, so the ~50watts rating netgear shows is pretty correct. It does spike up to around 5-6A during spinup though, and I am not running anything in the background on the unit, just the file share service. That does in include the inverter overhead, which is quite small in the case of what I am using. I have meant to build a 12V-12V switching supply so I can run it straight off the bateries, just havn't gotten to that yet...