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Solar, Storage & DERs
50 resultsAvoided Cost Rate
solar storage and dersThe avoided cost rate is what your utility would have spent to make or buy the power your solar made instead. Some utilities use this rat...
Azimuth and Tilt
solar storage and dersAzimuth and tilt describe how solar panels are positioned. Azimuth is the compass direction the panels face, and tilt is the angle they l...
Backup Power
solar storage and dersBackup power keeps part or all of your home running during an outage. It usually comes from a battery or a generator. Solar panels alone ...
Battery Energy Storage System (BESS)
solar storage and dersA battery energy storage system, or BESS, stores power for later use. It pairs battery cells with an inverter and controls. Sizes range f...
Behind-the-Meter
solar storage and dersBehind-the-meter means energy gear on your side of the utility's electric meter. Rooftop solar and home batteries are examples. Their pow...
Capacity Factor (Solar)
solar storage and dersCapacity factor compares how much electricity a solar system actually produces to what it would produce if it ran at full power 24 hours ...
Community Solar
solar storage and dersCommunity solar lets you share one big solar project built somewhere else. You sign up for a share of the project. You get credits on you...
Critical Load Panel
solar storage and dersA critical load panel is a small electric panel for your most important circuits. These might be your fridge, some lights, and your inter...
Curtailment (Renewable Generation)
solar storage and dersCurtailment means turning down solar or wind output on purpose. It happens when the grid has more power than it needs. It can also happen...
Degradation Rate (Solar Panel)
solar storage and dersDegradation rate is how much a solar panel's output drops each year as it ages. For modern panels, the drop is a small fraction of a perc...
DER Aggregation
solar storage and dersDER aggregation means grouping many small energy devices so they act as one large resource. These can be batteries, smart thermostats, an...
Distributed Energy Resource (DER)
solar storage and dersA distributed energy resource, or DER, is a small energy device at or near homes and businesses. It is not at a big power plant. Examples...
Duck Curve
solar storage and dersThe duck curve is a daily pattern on grids with lots of solar. At midday, solar output peaks, so other plants are needed less. In the eve...
Export Rate (Solar Compensation)
solar storage and dersThe export rate is the credit your utility gives for each unit of solar power you send to the grid. Some programs match the rate you pay ...
Federal Solar Investment Tax Credit (ITC)
solar storage and dersThe federal solar Investment Tax Credit, or ITC, can lower your federal income taxes. The credit is a share of what you paid for a solar ...
Front-of-the-Meter
solar storage and dersFront-of-the-meter means energy resources that connect straight to the power grid, on the utility's side of customer meters. Examples are...
Grid Services from DERs
solar storage and dersGrid services from DERs are ways small energy devices help the larger power grid. Home batteries, solar systems, and smart thermostats ca...
Home Battery
solar storage and dersA home battery stores power at your house, from solar panels or the grid, for later use. With the right gear, it can keep key things runn...
Hosting Capacity
solar storage and dersHosting capacity is how much solar and battery power a part of the local grid can handle without problems. Problems can include voltage i...
Interconnection
solar storage and dersInterconnection is the process of safely linking your solar or battery system to the utility's grid. You send in an application. The util...
Interconnection Agreement
solar storage and dersAn interconnection agreement is the contract you sign with your utility before your system can connect to the grid. It spells out the saf...
Islanding / Anti-Islanding
solar storage and dersIslanding is when a solar system keeps feeding power into utility lines during an outage. That is a danger to crews fixing the lines. Ant...
Kilowatt DC vs AC Rating
solar storage and dersSolar systems have two size ratings. The DC rating is the combined power of the panels themselves. The AC rating is the most power the in...
Microinverter
solar storage and dersA microinverter is a small unit mounted under each solar panel. It converts that one panel's power on its own. If one panel is shaded or ...
Net Billing
solar storage and dersNet billing is one way utilities credit solar customers for extra power. It is not the same as net metering. The power you buy and the po...
Net Metering
solar storage and dersNet metering is a billing method for solar customers. When your panels make more power than you use, the extra goes to the grid and you e...
Permission to Operate (PTO)
solar storage and dersPermission to Operate, or PTO, is the utility's final OK to turn on your new solar or battery system. It comes after your paperwork is ap...
Power Purchase Agreement (PPA, Residential Solar)
solar storage and dersA power purchase agreement, or PPA, is a contract with a solar company. The company owns and maintains the panels on your roof. You pay o...
Renewable Energy Certificate (REC)
solar storage and dersA Renewable Energy Certificate, or REC, is proof that clean power was made. One REC stands for one megawatt-hour of power from a source l...
Rooftop Solar
solar storage and dersRooftop solar is a solar power system placed on the roof of your home or building. The panels make power that your home uses first. That ...
Self-Consumption
solar storage and dersSelf-consumption is the share of your solar power that your home uses directly. The rest goes to the grid. You can raise it by running ap...
Shading Analysis
solar storage and dersA shading analysis studies how shadows from trees, chimneys, and nearby buildings will hit a solar array. It looks across the day and the...
Smart Inverter
solar storage and dersA smart inverter converts solar power for your home, like any inverter. But it can also help the grid. It can adjust output to steady vol...
Solar Access Rights
solar storage and dersSolar access rights are legal protections for putting solar panels on your property. They also protect the sunlight reaching those panels...
Solar Consumer Protection Disclosure
solar storage and dersA solar consumer protection disclosure is a required fact sheet in many states. Solar companies must give it to you before you sign a con...
Solar Easement
solar storage and dersA solar easement is a legal deal, usually with a neighbor, that protects the sunlight reaching your panels. It limits things like tall tr...
Solar Inverter
solar storage and dersA solar inverter changes the power from your panels into the kind your home uses. Panels make DC power. Your home and the grid use AC pow...
Solar Lease
solar storage and dersA solar lease lets you use a solar system that a company owns and puts on your home. You pay a fixed monthly amount. Unlike a PPA, you do...
Solar Loan
solar storage and dersA solar loan lets you borrow money to buy and own your solar system. You pay it back over time with interest. Since you own the system, y...
Solar Panel (Module)
solar storage and dersA solar panel, also called a module, is the flat unit you see on solar roofs. Inside are thin cells that make power when sunlight hits th...
Solar Photovoltaic (PV) System
solar storage and dersA solar photovoltaic (PV) system turns sunlight into power for your home. It includes the solar panels, an inverter, racks, and wiring. T...
Solar-Plus-Storage
solar storage and dersSolar-plus-storage pairs solar panels with a battery at your home. The panels make power during the day. The battery saves extra power fo...
Solar Production Estimate
solar storage and dersA solar production estimate predicts how much power your system should make in a year. It is based on system size, roof direction, shadin...
Solar Renewable Energy Certificate (SREC)
solar storage and dersA Solar Renewable Energy Certificate, or SREC, is a paper credit your system earns. You get one for each 1,000 kilowatt-hours of solar po...
Storage Dispatch
solar storage and dersStorage dispatch means deciding when your battery charges and when it sends power out. The software might keep a reserve for outages. It ...
Storage Incentive Program
solar storage and dersA storage incentive program gives financial help for a home battery. It might be an upfront rebate or a tax break. It might be ongoing pa...
String Inverter
solar storage and dersA string inverter is one central unit for a group of panels. The panels are wired together in a line called a string. The unit sits on a ...
Time-of-Export Compensation
solar storage and dersTime-of-export compensation ties your export credit to the clock. Power sent in busy evening hours earns more. Power sent at midday earns...
True-Up Statement
solar storage and dersA true-up statement is a once-a-year summary that settles your solar account. It adds up the power you bought and the credits you earned ...
Virtual Power Plant (VPP)
solar storage and dersA virtual power plant, or VPP, links many home energy devices with software. Batteries, smart thermostats, and car chargers can all join....