When the grid power is off, the Lumen becomes your whole house backup system, powering your appliances from the Sun while storing the excess in its batteries for the night and for cloudy days.
A breakdown of Lumen's features
How it works
ABOUT LUMEN
Lumen uses the Sun's energy to power your home
The smart capabilities of the Lumen prioritize solar energy over grid power and ensure your home is powered by solar energy even when the Sun is not out.
LUMEN ON SOLAR
LUMEN ON SOLAR
When the grid power is off, the Lumen becomes your whole house backup system, powering your appliances from the Sun while storing the excess in its batteries for the night and for cloudy days.
LUMEN ON POWER GRID
At night and when it’s cloudy, your appliances will be powered from the solar energy previously stored in the Lumen battery. If the solar energy stored in your battery is depleted and the Sun is still not out, the Lumen seamlessly switches to your utility - providing no disturbance to your every-day life.
LUMEN ON POWER GRID
At night and when it’s cloudy, your appliances will be powered from the solar energy previously stored in the Lumen battery. If the solar energy stored in your battery is depleted and the Sun is still not out, the Lumen seamlessly switches to your utility - providing no disturbance to your every-day life.
LUMEN ON SOLAR AND GRID
If you consume more than the Sun is providing at the moment, Lumen uses the solar energy previously stored in its batteries combined with grid power to keep your appliances powered.
LUMEN ON SOLAR AND GRID
If you consume more than the Sun is providing at the moment, Lumen uses the solar energy previously stored in its batteries combined with grid power to keep your appliances powered.
OUR EFFICIENCY
Superior power
Lumen hybrid system offers the highest efficiency in solar, battery and grid operation.
Solar Energy
Lumen maximizes solar energy usage and storage at any time of the day
Battery
When the Sun is producing more energy than you are using, excess energy is stored in the battery
Grid
Lumen will only use the grid if you use more energy than the Sun is providing and battery is not available
FAQS
Have questions?
Below are answers to some of our most asked questions.
What is AC and DC coupling?
AC (alternate current) or DC (direct current) coupling refers to the way in which energy interacts with a battery system. There is a lot of debate around which system is preferable, but each has their advantages and disadvantages.
AC coupled systems require separate inverters for solar and battery and are normally less efficient as the energy gets converted from DC to AC and back.
DC coupled systems are generally more efficient as they use a charge controller to charge the batteries directly with solar energy and use a battery-based inverter to power your appliances. DC-coupled systems may require a more complex set up.
Is Lumen AC or DC coupled?
The Lumen combines the advantages of both AC and DC to deliver the most efficient hybrid system. This ensures maximized energy efficiency by minimizing the number of conversions from DC to AC and back. Each conversion from DC to AC and back typically reduces efficiency by up to 15%.
Lumen on Solar: When Lumen operates from solar or battery it acts as a DC-coupled system. It has one conversion from DC to AC and no conversions to charge the battery (vs 2-3 conversions for traditional AC coupled systems): When there is no grid power, solar is DC coupled to AC output: native solar DC energy is only inverted once before AC output. Solar is also DC coupled to charge the battery as the solar energy is directly transferred to the battery via MPPT controller. The battery is DC coupled to AC output and the battery power is only inverted once before AC output.
Lumen on Grid: When Lumen operates from the grid, it acts as an AC coupled system. It has no conversion to AC output and only one conversion to charge the battery (vs 2 conversions for traditional DC-coupled systems): When the grid power is on, the grid power is directly coupled to the output. Grid AC power is transferred directly to AC output through a transfer switch. Grid power is rectified to charge the battery.
What is the difference between Lumen and inverSOL 5000?
The Lumen is a single unit system that uses Lithium-Ion NMC batteries for energy storage. Lithium-Ion NMC batteries have a higher energy density, which means it takes less space and weight to store the same amount of energy. It also has a longer lifespan (10 years). To compare to Lumen, inverSOL 5000 has lead-acid batteries, that have a shorter life (they need to be replaced after 3-4 years) and lower energy density, which means it takes more space. Both Lumen and inverSOL 5000 have the same energy storage capability, however, inverSOL 5000 has an external battery cabinet. These two factors – size & weight as well as the length of life make inverSOL 5000 a more economical solution in the short term, however, the total cost of ownership throughout 10 years is lower for Lumen.