EV Charging Availability API reports 'unknown'

I’m trying to get availability data on EV charging stations. I ran a few through the API explorer and they all return availability as ‘unknown’. Can the API do any better? I’m on the free tier, could that be the problem?

{
“connectors”: [
{
“type”: “Chademo”,
“total”: 1,
“availability”: {
“current”: {
“available”: 0,
“occupied”: 0,
“reserved”: 0,
“unknown”: 1,
“outOfService”: 0
},
“perPowerLevel”: [
{
“powerKW”: 150,
“available”: 0,
“occupied”: 0,
“reserved”: 0,
“unknown”: 1,
“outOfService”: 0
}
]
}
},
{
“type”: “IEC62196Type1CCS”,
“total”: 4,
“availability”: {
“current”: {
“available”: 0,
“occupied”: 0,
“reserved”: 0,
“unknown”: 4,
“outOfService”: 0
},
“perPowerLevel”: [
{
“powerKW”: 150,
“available”: 0,
“occupied”: 0,
“reserved”: 0,
“unknown”: 3,
“outOfService”: 0
},
{
“powerKW”: 350,
“available”: 0,
“occupied”: 0,
“reserved”: 0,
“unknown”: 1,
“outOfService”: 0
}
]
}
}
],
“chargingAvailability”: “1fy7E9NTsp5tUWyC0D51Vw”
}

I’ve seen similiar results when using the wrong chargingAvailability ID. The one you provided looks wrong. Are you sure you used the correct one from the POI or nearby search API?