The affordable way to electrify industrial steam
Caldera's Storage Boilers convert renewable electricity into steam at up to 16 barg. They charge when power is cheapest and often greenest, and deliver steam on demand, often without a grid upgrade.
Where the value comes from
A Storage Boiler works like an electric boiler when you need steam now, and stores heat when you don't. That split lets it capture value in several places, depending on your site, tariffs and market.
The Storage Boiler charges ahead of time, so your connection and transformers are sized to your average load, not your peak steam demand. Controls charge only within the headroom you have, so many sites can start inside their existing connection.
Intelligent controls charge in the cheapest and often greenest hours automatically, and fast charging catches even short low-price windows. In many hours electricity is cheaper than the fuel it replaces.
When the grid curtails renewables, or your own solar produces more than you use, the boiler stores that energy as heat. It also supports larger solar arrays than your other electrical loads would justify.
The Storage Boiler can switch its charging on or off within seconds to help hold grid frequency, and grid operators often pay for that flexibility. The thermal store keeps delivering steam on demand throughout.
Stored heat covers your steam through peak periods, so you draw less at the times capacity charges are set. Capacity payments may add to this where they are available.
Lowering your gas usage reduces your exposure to fuel price spikes and cuts your direct (Scope 1) emissions. This also lowers the cost of carbon taxes or emissions allowances.
The value of each depends on your site and demand profile. We model your half-hourly data against real price signals across 8,760 hours to find out.
Estimate your savings
Share a few details about your site and we'll send you an estimate.
Combine technologies for the best economics
The strongest business cases rarely come from one technology alone. We size each part of the system for the share of demand it serves most economically.
Especially powerful in a retrofit. The Storage Boiler takes the load it serves most cheaply while the existing gas boiler covers the rest, giving a faster payback than full replacement.
Important for full electrification. Heat pumps cover lower temperatures and continuous duties efficiently. The Storage Boiler handles higher temperatures and demand peaks.
Steam demand, electrical demand, and your existing setup. We are used to working with sites to estimate sensibly across any gaps in the data.
We simulate how a Storage Boiler would respond to real energy price signals across 8,760 hours, then test different specifications to optimise. We also consider hybrids with heat pumps or your existing gas boiler.
You receive a set of options showing the trade-offs in capex, opex, and emissions reduction, so you can choose the case that fits your priorities.
Send us your steam profile
Share twelve months of half-hourly data and we'll model your site.
