Single-pot stock cooks
If the stockpot is your only pan on the hob, look for a zone that fits its base and controls that let you move from a boil to a gentle simmer.
For one pot of vegetable stock, start with a single-zone induction hob whose supported pan size fits your stockpot’s flat base and whose manual controls let you reduce the heat for simmering. Choose two zones if another pan needs heat at the same time; allow for the larger footprint and check how the appliance’s total power is divided. Either choice needs induction-compatible cookware and a suitable electrical connection.
If the stockpot is your only pan on the hob, look for a zone that fits its base and controls that let you move from a boil to a gentle simmer.
If stock needs to simmer while another part of the meal cooks in a separate pan, two zones may justify the additional worktop space.
If the hob will be put away between meals, consider its storage dimensions alongside stockpot fit. A slimmer body does not add a second cooking zone.
Check the stockpot’s flat base and the hob’s simmer controls before deciding whether a second zone is useful. The concerns below reflect different primary needs when choosing a portable hob for a family pot of vegetable stock.
| Concern | What to check | Who this matters to |
|---|---|---|
| Stockpot fit | Check that the pot is induction-compatible. Measure its flat magnetic base, not its rim, against the hob’s stated pan range. | I want to use the family stockpot I already own, so whether its base fits would decide my choice; roughly 29% of consumers would put stockpot compatibility first. |
| Simmer control | Look for documented manual settings at the low end and controls you can adjust after boiling. Treat a timer as an aid, not supervision. | Once the stock boils, I need to turn it down and keep an eye on the simmer; for roughly 29% of consumers, low-heat control would be the primary concern. |
| A second pan | Check that both zones fit your pans, then compare the appliance’s total rating with any stated per-zone limits. | When the rest of the meal needs another pan while stock simmers, two zones become more useful; around 18% of consumers would make second-pan capacity their deciding need. |
| Electrical use and space | Check the appliance’s connection requirements and leave stable worktop space for the hob, pans and handles. Consider where it will be stored. | If my available socket, worktop or cupboard space constrains the setup, those practical limits come first; for around 24% of consumers, safe use and storage would drive the choice. |
An induction hob needs compatible cookware, and a stockpot’s wide rim does not tell you the diameter of its flat base.
Check the base with a magnet, measure it and compare it with the model’s supported pan range. For the Tefal IH201840, the published pan-size wording differs, so check the manual before relying on the upper limit.
A pot that cannot be used on the chosen hob may need replacing.
A second zone helps only when another pan needs heat at the same time. A dual hob also takes up more worktop room, and its total wattage is not the wattage available to each pan.
If stock is the only cooking task, focus on the single zone’s pan fit and simmer controls. If two pans will run together, check each zone’s limits and the space needed for both.
A preset may be designed for a particular quantity and pan. Tefal’s induction-cooker guidance describes a boil programme based on 1.5 litres in a 20cm pan and warns that smaller amounts may boil dry if left unattended.
Use a preset as a starting point, then reduce the heat and stay nearby while the stock cooks.
Electrical Safety First states that a single socket has a maximum load of 13A, or about 3kW. A portable hob can take up much of that capacity, particularly if other appliances share an extension.
Use a suitable wall socket where possible. If an extension is necessary, check its marked rating and every connected load, fully unwind a cable reel used at high load, and do not daisy-chain extensions.
Tefal’s Everyday and Everyday Slim are single-zone options for cooking with one induction-compatible pan.
Daewoo’s listed portable induction hob is a single-zone, plug-operated option.
VonShef’s dual induction hob is relevant when stock and another pan need heat together.
Ciarra lists a slim, plug-in dual-zone induction hob for meals that require two pans.
This portable induction hob is a single-zone option to consider when vegetable stock is the only pan you need to heat. Check your stockpot and electrical setup before choosing it.
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For a single stockpot, this portable hob offers adjustable heating through 10 power settings. Its product name also lists six functions, touch controls and a safety lock.
Before ordering, check that your pot’s magnetic flat base fits the supported pan range. Consult the manual for low-heat settings and confirm the plug and electrical requirements for your kitchen.
It will work only if it is induction-compatible and its flat base fits that model’s supported pan range. Check for an induction symbol or whether a magnet adheres to the base, then measure the flat part. Tefal’s published wording for the IH201840 differs on the upper pan-size limit, so consult its manual before choosing it for a large pot.
One zone is enough if the stockpot is the only pan that needs heat, provided the pot fits and the controls suit simmering. Choose a dual-zone hob when another part of the meal needs a separate heated pan at the same time.
Use an extension only if its marked current rating and the electrical setup can accommodate the hob and every other connected appliance. Electrical Safety First gives 13A, or about 3kW, as the maximum load for a single socket and advises against daisy-chaining extensions. A suitable wall socket is the simpler choice where one is available.
No: a timer does not replace supervision while stock is heating. Tefal’s induction-cooker guidance warns that smaller quantities may boil dry if left unattended on its boil programme. Reduce the heat after boiling and stay nearby.
For a hob supplied in Great Britain, check the product identification, instructions and seller details rather than assuming an individual listing meets the rules. Office for Product Safety and Standards guidance dated 25 March 2025 explains that the Electrical Equipment (Safety) Regulations 2016 set requirements for electrical equipment placed on the Great Britain market; Northern Ireland has separate arrangements.