Five transparent tools, one page. Find the right chemistry for your duty, model the levelized cost of storage for supercapacitor, Sodium-Ion, and lithium, the economics of battery-buffered DC fast charging, and whether your site needs a panel upgrade. Enter your own numbers; every formula is shown. No email gate.
LCOS spreads a system's lifetime cost over every kWh it delivers. Supercapacitor cycles hardest, never needs replacement, and carries no HVAC or fire-suppression load, so it delivers the lowest lifetime cost. Lithium looks cheaper on day one, then augments and replaces. Every assumption below is visible and editable.
LCOS = PV(capex + replacements + O&M − salvage) ÷ energy delivered,
costs discounted at the WACC over your horizon, energy summed nominally, the same present-value method XEYAR uses.
Lithium replaces at year 15 and carries HVAC and insurance; supercapacitor and Sodium-Ion run the horizon on one install.
Grid charging energy is separate and roughly chemistry-independent, so it is excluded to isolate the storage cost.
All figures in USD.
A standard DC cluster pulls its full nameplate from the grid and bleeds demand charges every month. The patent-pending XEYAR Cluster draws a fixed 83.1 kW and buffers the burst. Set your site and see the gap.
Drop in your service panel and existing load, size your DC fast charging, and see whether it fits, or whether battery-buffering avoids a $50K to $200K upgrade.
Your charging load exceeds available capacity.
LCOS, the levelized cost of storage, is the lifetime cost of a storage system spread over every kWh it delivers, expressed in cents per kWh. Following the XEYAR LCOS model, we compute it as the present value of capital cost plus mid-life replacements plus operations and maintenance, less salvage value, divided by the energy the system delivers over your project horizon, with costs discounted at the WACC. It isolates the storage hardware, so grid charging energy, which is roughly the same for every chemistry, is left out to keep the comparison clean.
Because it wears out and gets replaced. A lithium (LFP) pack is rated for roughly 3,000 to 6,000 cycles and 10 to 15 years, so across a 20-year horizon it takes a full replacement, and that is another capital outlay. XEYAR supercapacitor (500,000+ cycles, 25+ year operational life) and Sodium-Ion (20,000+ cycles, 25-year design life) run the whole horizon on a single install, and both use 100% depth of discharge versus 80 to 90% for lithium, so they deliver more kWh from the same nameplate. The more you cycle, the wider the gap.
The defaults are calibrated so the 20-year result reproduces XEYAR's published LCOS: supercapacitor 7.2, Sodium-Ion 12, and lithium 20 cents per kWh. Turnkey installed prices, fully editable, are $1,000 per kWh for supercapacitor, $775 for Sodium-Ion, and $625 for the lithium (LFP) baseline, each covering storage, power conversion, install, and engineering. Each chemistry runs at its typical duty, supercapacitor at 2 cycles per day, Sodium-Ion and lithium at 1. Cell specs come from XEYAR datasheets: supercapacitor 500,000+ cycles and 97% round trip; Sodium-Ion 20,000+ cycles and 94 to 97% round trip; both at 100% depth of discharge. Lithium uses 80 to 90% depth of discharge and degrades in efficiency, takes a full replacement at year 15, and carries HVAC and insurance the others do not. A 30% Clean Tech ITC and a 10% salvage value apply to all. Enter your own quote and duty to see your result.
A standard DC cluster pulls its full nameplate from the grid, so a 480 kW site sets a 480 kW peak that the utility bills every month. The patent-pending XEYAR Cluster puts a battery on a shared DC bus between the grid and the chargers: the grid trickles a fixed 83.1 kW into the buffer, and the buffer covers the session burst. The site delivers the same fast charging while its billed peak stays at 83.1 kW, which is what eliminates the demand charge.
No. The battery hardware is VPP-ready today, but the grid-arbitrage revenue activates when XEYAR Nexus VPP dispatch goes live, a 2027 roadmap item. We show it as a clearly-labeled future upside and never include it in the payback. The estimate is the pack size times 50% export depth times the price spread times cycles per day times 264 operating days.
Demand charge equals peak kW times the demand rate in dollars per kW per month times 12 months. Peak kW is kW per port times the number of ports for a grid-only site, or a fixed 83.1 kW for a buffered XEYAR Cluster. On a $15 per kW per month tariff, a 480 kW peak costs about $86,400 per year, while the buffered site pays about $14,958, and the difference is the headline savings.
Treat these tools as an honest first look, not a final pro forma. Real results depend on your exact utility tariff, local incentives, site lease, and traffic. Every default is editable and every formula is shown, so you can pressure-test the assumptions. Get engineering and finance review before committing capital, and XEYAR will build the site-specific model with you.
XEYAR Ltd. holds two USPTO provisional patent applications, both patent-pending, naming Sal Möten as inventor: the XEYAR Cluster (39 hardware claims) covering the battery-buffered clustered charging architecture, and XEYAR Nexus (45 software claims) covering the orchestration platform, including VPP dispatch. Both technology options, supercapacitor and Sodium-Ion, run on the same UL 9540 certified DC architecture.
XEYAR runs one chemistry per project, chosen for the duty cycle. Answer a few questions and see which architecture fits, supercapacitor for power, Sodium-Ion for energy.
Both are XEYAR, both eliminate thermal runaway. This is a starting point; XEYAR engineers confirm the chemistry against your full duty cycle, climate, and budget.
XEYAR engineers battery-buffered EV charging and energy storage on one certified architecture, supercapacitor or Sodium-Ion, chosen per project. Share your site and we will build the numbers with you.