The solar you already generate, finally used.
PJJ Recover captures the generation your array makes but your site cannot take, and stores it for the hours when grid power costs you most. At our pilot site in Bangkok, roughly 30% of everything the array produced was being curtailed before CESS connected.
Modelled at the 120 kWh / 60 kW system our engine sized for the pilot site, from the site's own metered load.
Curtailed solar does not show up on any bill. That is why nobody chases it.
You paid for the panels. On a good day they can make more than the plant can use at that moment, and whatever the site cannot take is simply not produced. Nothing records it as a loss.
Output above the load
Around solar noon the array can outrun the plant, especially over a lunch break or on a light production day. The excess is curtailed.
Full sun, empty lines
The array does not know the factory is on one shift. On weekends and holidays it keeps producing for a plant that is barely drawing.
Clipping
When the panels can deliver more than the inverter is rated for, the top of the curve is cut off. It is generated in principle and lost in practice.
Store it at noon. Spend it on-peak.
PJJ Forecast sees the surplus coming. PJJ Dispatch keeps room in the battery for it rather than filling up from the grid first. Then the stored energy goes out in the evening, when it displaces grid power at the on-peak rate.
In the product this shows up as two Dashboard tiles, Solar Surplus and Self-Consumption: surplus falling towards zero and self-consumption rising towards all of it is what recovery looks like.
Modelled at the 120 kWh / 60 kW system our engine sized for the pilot site. Ranges run from a conservative floor to an upper estimate.
The largest driver is the one most vendors do not lead with.
In our model of the pilot site, recovering curtailed solar is worth more each month than peak shaving and arbitrage put together. The energy is already being generated. What was missing was somewhere to put it until it was worth something.
Your number will be different, because it depends on how much your array outruns your load and when. That is what the feasibility model works out, from your own telemetry, before you commit anything. The full investment case shows how the three drivers were modelled.
No solar yet? Recover has nothing to do, and we will say so.
Peak shaving and tariff arbitrage work on grid supply alone, so CESS still has work to do. But existing solar makes the case considerably stronger, and if your array clips at midday or overproduces at the weekend, the value is already on your roof.One module does not run on its own.
PJJ Recover is one of four parts of the Cloud Energy Storage System. Each hands something to the next, and the savings come from all four running together.
Find out what CESS would do at your site.
Twelve months of billing data, and we will model your load, size the system and show you the whole financial case, including when the answer is not to build.
Or reach us at solarbuddies@pjjsolutions.tech