More power—when you need it most.

The Evergrid lets a residential PV system produce power when the grid is down, to keep the lights on, cell phones charged, and the refrigerator and AC running.

Maxout's Evergrid is an affordable solution to keep solar power flowing when the grid is down. The Evergrid provides voltage stabilization, load balancing, and enough surge power capacity to maintain daytime, whole-house power for homes with any residential PV system. At a target cost of $1000, it provides a major missing piece in the renewable energy grid—and it’s a game-changer for homeowners who own, or are considering, solar power arrays.

Grid outages take down PV systems, too.

Under normal conditions, the power grid provides the voltage stabilization, load balancing and surge power that PV systems need in order to function. When the grid goes down, most PV systems go down, too.

A battery backup option can keep the system running, but today's battery systems add $10,000–30,000 to the cost of an installation—far too expensive for most homeowners. 

VSC Technology is a smarter path to whole house power

Power plants have been using synchronous condensers for over 100 years to absorb or generate real and reactive power to stabilize the grid. Industrial synchronous condensers typically employ massive, free-spinning DC motors to generate kinetic energy to provide voltage stabilization.

A similar approach can be used on a residential scale with a “virtual synchronous condenser” (VSC). The VSC provides AC stabilization, load management, and surge capacity to allow a standard, grid-tied PV system power a home through an outage. The VSC includes a lead-acid battery or small bank of supercapacitors to provide the surge capacity, typically 5–10 kW. A critical feature of the VSC approach is that the surge power it provides is in addition to that produced by the PV panels, so even a small PV system can continue to function during a power outage.

The Evergrid changes the equation for backup power.

The Evergrid stands in for the grid during an outage. It employs VSC technology, taking over voltage stabilization and load balancing during a grid outage to keep the power flowing. Evergrid provides up to 15 kW of boost power in addition to the output from your PV array. It’s enough surge power to run refrigerators, air conditioners, and other appliances with high surge loads. It’s the right-sized solution—and at a target cost of $1000, it’s affordable as well.

The Evergrid is also there for those who already have battery backup. The Evergrid’s surge power adds to system capacity so a battery system can be sized for the normal load rather than the surge load—for a huge savings in upfront hardware costs.

Evergrid eliminates "overload events," a common cause of service calls for battery backup systems during grid outages. And it extends battery life by protecting them from life-limiting surge events.

Which Evergrid is right for you?

Evergrid Standard

The turnkey unit connects to a PV array or PV inverter for whole-house daytime power. For residential and small commercial applications.

Evergrid Backup

The standard Evergrid, plus up to 10kWh LiFePO4 battery backup for nighttime power. 

Evergrid-EP

Portable unit connects to an external automotive battery and PV array or PV inverter for disaster recovery assistance.

Polyverter. Maxout’s all-in-one hybrid inverter with a built-in Evergrid Backup for whole-house, on-grid, and off-grid PV power.

Why we are building the Evergrid

Over 2,000,000 American homes have solar installations—yet almost all of them stop producing power during an outage—precisely when we need them most. With the Evergrid, homeowners know that their solar investment is there for them when they need it. And, at a target cost of $1000, it is an easy addition for new installations as well.

The Evergrid will be available through select PV installers.

Watch this space to learn more about the game-changing Evergrid in the coming weeks and months.