The choices for "grid-tied" PV systems:
Solar CenTex installs "grid-tied" solar PV systems which means you are still receiving a portion of your electricity from your current Retail Electric Provider (the "REP"). The amount you get from your REP is entirely dependent on the size of the PV system that is installed: typically expect that 30% to 99% of your electricity needs can be met by solar.
While we do install battery backup systems, the reality is that 70% of homeowners in our Central Texas region will be fully satisfied with a "grid-tied" versus "battery backup" system.
You will have two choices when it comes to "grid-tied" PV systems:
- DC Optimizers at each solar module; we use SolarEdge
- Microinverters at each module; we use Enphase
DC Optimizers are gaining huge support and for good reason.
A DC Optimizer attached to each solar panel ("module") brings each module to the same voltage, regardless of sunshine or shading. This allows the entire "string" of modules to operate at its peak efficiency.
This power is delivered to an inverter at the wall where it is turned into AC power for the house.
The advantages include great warranties (25 years for the DC Optimizer, 12-20 years for the inverter); the ability to monitor the power output of individual modules; much better shade tolerance so if that chimney casts a long shadow in the afternoon, you won't see a significant power degradation.
Enphase IQ7 microinverters mark the return of this long-time manufacturer to prominence.
Each "micro" inverter directly converts module DC power to 240-AC current.
Just like SolarEdge, this system is fully compliant with Rapid Shutdown requirements from the National Electric Code.
Enphase is offering the most reliable technology in the industry today.
No matter your choice, each of these is an amazing inverter
from a trusted manufacturer.