Better energy.
A brighter
every day.
Plain-language explainers on home batteries, solar power, wind energy and how the electricity grid works — with the numbers behind every answer and free calculators you can try.
Find your starting point ↗ Explore the free toolsWhat would you like
to understand better?
Four topics, explained with the numbers behind them. Pick the question closest to yours and start there.
Make stored power last.
How battery banks really behave: wiring, voltage drop, BMS limits, inverter losses, temperature and aging.
- How Depth of Discharge Affects Lithium Battery Cycle Life
- How Parallel Battery Wiring Adds Capacity Without Changing Voltage
- How DC Cable Voltage Drop Reduces Inverter Performance
Read the wind.
How turbines turn moving air into power, why spacing and hub height matter, and what changes offshore.
- How Wind Shear Changes Output at Different Turbine Hub Heights
- How Wake Losses Affect Wind Farm Turbine Spacing
- How Turbine Capacity Factor Differs from Turbine Efficiency
Make sense of sunlight.
Net metering, partial shading and MPPT behaviour, plus practical fixes when solar lights stop working.
- How Net Metering Rules Change the Value of Adding a Home Battery
- How Partial Shading Changes String Current and MPPT Behavior
- How to Fix a Solar Light Sensor
See the bigger picture.
Why power prices can go negative, how congestion forces curtailment and where storage fits in.
- How Grid Congestion Can Create Negative Electricity Prices
- How Grid Congestion Can Cause Renewable Curtailment
- How Wind Forecasting Errors Affect Grid Balancing Requirements
A little math.
A lot more clarity.
Explore three everyday energy questions. Change the example inputs to your own numbers; each tool shows the calculation behind its estimate.
Your inputs stay in your browser. These simplified tools support learning; they are not equipment specifications or installation designs.
Common Appliance Wattages
Not sure what to type into the appliance calculator? Start with a typical figure, then swap in the number from your appliance’s label or a plug-in energy meter.
- Tap Use to load a value into the calculator.
- Cycling appliances (fridges, AC, heaters) draw full power only part of the time. For a fridge, use the 24-hour average with 24 hours a day.
- Ranges are typical, not exact — models vary widely.
Choose the question
before the technology.
Generation, storage and efficiency solve different problems. Understanding the distinction makes comparisons more useful.
| Option | What it does | What to check | A common misconception |
|---|---|---|---|
| Energy efficiency | Reduces energy needed to deliver a service or level of comfort. | Current use, building condition, ventilation and installation quality. | Every upgrade produces the same savings in every home. |
| Rooftop solar | Generates electricity at your property during available sunlight. | Roof life, shade, generation estimate, utility terms and warranties. | Annual generation equal to use means a zero electricity bill. |
| Battery storage | Stores electricity for use at another time. | Usable energy, continuous power, supported circuits and reserve settings. | Any battery can run every appliance during an outage. |
| Heat pump | Moves heat for space conditioning or water heating. | Building heat demand, climate performance, distribution and sizing. | Equipment efficiency alone determines the final running cost. |
| Community solar | Offers participation in a shared solar project where available. | Eligibility, subscription charges, bill credits and cancellation terms. | Every community solar contract has identical terms. |
| Renewable electricity plan | Changes how an electricity purchase is supplied or matched. | Supplier claims, certificates, contract length and pricing. | A renewable plan provides household backup power. |
Small steps.
A more informed next move.
Build a picture of your home before comparing equipment. These four steps turn a broad goal into useful questions.
Read the pattern.
Gather 12 months of bills. Record kWh separately from the total amount paid, and note seasonal changes, occupancy and new appliances.
Name the priority.
Choose what matters most: comfort, lower demand, cleaner supply or outage resilience. List any planned changes, such as an electric vehicle.
Check the basics.
Review lighting, controls and maintenance. Identify persistent comfort problems and ask whether a professional home assessment would help.
Compare clearly.
Use the same assumptions across proposals. Request equipment details, expected output, exclusions, warranty responsibilities and service arrangements.
Five questions worth asking
What assumptions drive the estimate? · What is included in the price? · What happens if the equipment underperforms? · Who handles maintenance and warranty claims? · Which local utility and installation requirements apply?
A few terms.
A stronger foundation.
- kW · kilowatt
- A unit of power: the rate at which energy is used or produced. One kilowatt equals 1,000 watts.
- kWh · kilowatt-hour
- A unit of energy. A constant 1 kW load running for one hour uses 1 kWh.
- Peak sun hours
- Daily sunlight expressed as the equivalent hours at a reference intensity of 1,000 watts per square metre. It is not simply daylight duration.
- Inverter
- Equipment that converts direct-current electricity from panels or batteries into alternating current used by most household circuits.
- Self-consumption
- The share of your generated electricity used at your property rather than sent to the grid. Timing affects how much you can use directly.
- Export credit
- The value your utility assigns to electricity sent to the grid. It may differ from the price you pay to import electricity.
- Usable battery capacity
- The amount of stored energy a battery allows you to draw under specified conditions, usually expressed in kWh.
- Power rating
- How quickly a device can deliver or consume energy. A battery’s kW rating and kWh capacity describe different limits.
- Demand flexibility
- Shifting when electricity is used, for example by scheduling charging, to match available supply or a different electricity price.
- Heat pump COP
- Coefficient of performance: heat delivered divided by electricity input under stated conditions. Performance changes with operating conditions.
- Embodied emissions
- Emissions associated with producing, transporting and installing a product, distinct from emissions during operation.
- Simple payback
- Upfront net cost divided by estimated annual net savings. This simplified measure leaves out financing, time value and later changes.
Fresh Thinking for Your Next Energy Question
The latest explainers on home batteries, solar power, wind energy and the electricity grid. New articles appear here automatically.
How Microgrids Isolate from the Grid and Resynchronize After Outages
Microgrids isolate by using protective relays and high-speed switches to disconnect at the Point of Common Coupling when grid power fails. They stabilize locally using grid-forming…
How Distributed Energy Resources Improve Resilience During Grid Outages
Distributed energy resources improve grid outage resilience by generating and storing electricity locally. Through intentional islanding,…
Nov 2, 2026 · 10 min readHow Hurricanes Affect Fuel Supply and Electric Grid Restoration
Hurricanes disrupt fuel supply and electric grid restoration by damaging transmission infrastructure, flooding refineries, and disabling…
Nov 2, 2026 · 8 min readHow Wildfires Threaten Transmission Reliability
Wildfires threaten transmission reliability by causing physical heat damage to conductors and substations, creating smoke soot…
Nov 2, 2026 · 7 min readHow Drought Can Reduce Both Hydropower and Thermal Generation
Drought reduces hydropower generation by lowering reservoir water levels and river flow. Simultaneously, it limits thermal…
Nov 2, 2026 · 6 min readHow Cold Snaps Increase Gas and Electricity Demand at the Same Time
Cold snaps trigger a sudden space heating load surge across residential and commercial buildings. As natural…
Nov 2, 2026 · 10 min readHow Extreme Heat Increases Electricity Demand and Reduces Thermal Power Efficiency
Extreme heat creates a dangerous compounding crisis for power grids. It spikes electricity demand through intensive…
Nov 2, 2026 · 9 min readStart curious.
Leave clearer.
Energy decisions depend on the home, the equipment and the local context. Start with the essentials, then check the details that apply to you.
Clarity before claims.
We explain concepts in plain language, make calculator assumptions visible and distinguish estimates from promises. These pages help you ask better questions and understand the trade-offs.
For information about The Cleanergy and editorial standards, see About in the footer.
Should I consider efficiency before solar?
Understanding current demand helps you judge the size of a future solar system. Planned changes to heating, transport or occupancy also matter. The sequence of upgrades depends on your home and project timing.
Will ordinary solar panels power my home in an outage?
Many grid-connected systems shut down when the grid fails. Backup requires equipment and controls designed for safe operation during an outage. Ask which circuits remain powered, for how long and under which conditions.
Is battery capacity the same as battery power?
No. Capacity in kWh describes stored energy; power in kW describes the rate at which it can be delivered. Both matter when deciding which loads a system can support.
Why does solar generation not equal bill savings?
Some generation may be exported, credits may differ from retail prices and fixed charges can remain. The timing of use and local billing arrangement matter as much as annual energy totals.
Can renters explore cleaner energy?
Lease-permitted lighting and appliance choices can be a starting point. Some areas offer community solar or renewable electricity plans; availability, eligibility and contract terms vary.
How accurate are the calculators?
They show simplified relationships using the numbers you enter. Solar output changes with weather, shade and system conditions; appliances cycle; battery loads vary. Use a site-specific assessment for equipment decisions.
Does clean energy mean no environmental impact?
No technology is impact-free. Manufacturing, materials, land use, operation and end-of-life handling all matter. Operational emissions are only one part of a full lifecycle comparison.
Are these installation instructions?
These are educational explanations. Electrical, roofing, battery and heating work needs appropriate professional assessment and compliance with local requirements.
One better question
can change your next step.
Return to the workbench, explore the essentials or catch up with the blog.
Try the energy tools ↑ Read the latest articles ↑