Commercial battery systems leave 15–30% of their savings unrealized.
We recover it.
Ampra Grid's Joule™ controller optimizes for peak shaving, energy arbitrage, and VPP dispatch — automatically, site by site, month by month.
THE PROBLEM
Your inverter's built-in controls weren't built for your site — or your market.
Standard inverter firmware ships with seasonal presets. One or two programming windows a year. But your facility's load profile doesn't work that way, and neither do electricity markets. Rates change. Demand windows shift. VPP dispatch events don't wait for your next programming cycle.
The result: systems optimized for a generic peak, not your actual one. Arbitrage opportunities missed because the battery charged at the wrong time. VPP events that conflict with on-site economics and nobody coordinating between the two.
Real savings are lower than the proposal. Clients notice. Repeat business doesn't follow.
An external EMS controller isn't an add-on. It's what protects the economics your proposal promised.
Trusted by EPCs and solar developers across the US and Canada
Economic Optimization
Joule™ connects directly to your inverter via Modbus — no cloud dependency, no API risk. It coordinates peak shaving, time-of-use arbitrage, and VPP dispatch in a single control layer, prioritizing the highest-value action at every interval.
Hardware Built for the Field
Industrial-grade, DIN-rail mounted, cellular-connected. Remote commissioning means no truck roll to start up. Three years of data included. Works with Sol-Ark, EPC Power, and other SunSpec-compatible inverters.
Performance You Can Show
Monthly reports comparing projected vs. realized savings — across demand charges, arbitrage revenue, and VPP participation. Fault alerts and grid outage notifications by email and SMS. Your clients stay informed. So do you.
HOW IT WORKS
From interval data to optimized site in days, not weeks.
Ampra Grid provides a custom EMS controller and reporting service which saves more money than traditional inverter controls.
Secure Your
Electric Bill
Our Joule controller dynamically updates to facility power levels and electric rate, increasing savings beyond out-of-the-box capability.
Performance
Security
Ampra Grid emails monthly economic reports to key team members, keeping you on track to support project expectations
Economic Alerts
Get emailed fault notifications and system warnings emailed to key team members when events warrant immediate attention
Ampra Grid Joule™
with OptimaEngine
Our ruggedized hardware solution that serves as the central nervous system for your renewable energy assets. Joule™ provides real-time monitoring, control, and communication between all system components.
One controller. Three revenue streams.
Most sites are only capturing one. Joule™ stacks them.
1
Peak Shaving
Demand charges can be 50% of a commercial electric bill, triggered by a spike that lasts minutes. Joule™ targets that spike not your base load, not a seasonal average.
Energy Arbitrage
Charge during off-peak hours, discharge when rates are highest. Joule™ tracks your TOU schedule and adjusts automatically as rates change.
VPP Integration
Participate in utility and aggregator dispatch programs without sacrificing on-site savings. Joule™ coordinates dispatch events against your local economics so you're never choosing one over the other.
Frequently asked questions
Here are some common questions about our company.
If your inverter supports Modbus or SunSpec TCP, yes. We've built a translation layer that cuts integration time from weeks to hours. Reach out and we'll confirm compatibility before you commit.
Nothing changes on your site. Joule™ communicates directly with the inverter at the machine level — no cloud dependency, no API middleman.
Yes. Send us your interval data and utility rate schedule and we'll show you the projected stack: demand charge reduction, arbitrage revenue, and VPP participation value all before you close the deal.
Commercial systems from roughly 100 kWh to 6 MW. The economics are strongest in markets with demand charges above $15/kW.
Security is fundamental to Ampra Grid, our controller incorporates best practices from both IT and energy storage industries. This includes certificate-based authentication, encrypted data transmission and storage, secure remote system updates, and role-based access controls.
Know exactly what your next project will save — before you sell it.
Send us your interval data. We'll model the gap between standard controls and Joule™ and show you the numbers.