I recently had an email from Bulb with a link to book a smart meter installation appointment. However, the booking questionnaire asked if I have an immersion water heater (which I do) and apparently this disqualifies me from getting a smart meter.
From what I read online, this is because most homes with an immersion heater or storage heaters will require a “5 terminal” meter, and that 5-terminal smart meters aren’t currently available. I’m trying to figure out if our current meter is suitable to be swapped to a Smart Meter, even though the Bulb booking questionnaire says no.
We have a single “dual rate” meter (one meter with two readings). We also only have one fuse box and I can’t see any sign that it is connected to two different supplies (one day and one night).
Our water cylinder is brand new, it only has a single mains cable running to it and it is powered all day and all night. Any timing for the heater is set with the built-in timer.
We actually want to switch to a single-rate tariff, rather than economy-7 (various reasons, which I don’t want to get into), so separate readings for day and night usage aren’t really important to us.
Does anyone know how I can tell if I have a “4-terminal” or “5-terminal” meter? I’ve attached a photo of the meter box.