Guides
Energy guides
Plain-English explainers and comparisons for solar, EV and home-energy decisions — each one points you to a calculator to run your own numbers.
Are home batteries worth it?
Home batteries pay off on savings mainly with time-of-use rates or surplus solar; on arbitrage alone paybacks are long, but backup value can still tip it.
Updated SolarAre solar panels worth it?
Solar usually pays back in 7-12 years, then powers your home near-free for ~20 more. See when it is worth it, when it is not, and how to get your own number.
Updated EVHow much does it cost to charge an electric car?
Charging an EV at home costs about $11 per full charge and roughly $5 per 100 miles. See home, public and DC fast-charging costs, plus how to cut your bill.
Updated EVEV vs gas: total cost of ownership compared
Do EVs really cost less than gas cars? We model fuel, charging, maintenance and break-even with representative US prices so you can see when an EV wins.
Updated Home energyHeat pump vs gas furnace: running costs compared
Heat pump vs gas furnace running cost, decoded — how a heat pump SCOP of 3.2 beats a 90% furnace, when cheap gas wins, plus upfront cost and payback.
Updated EVHome vs public EV charging: which is cheaper?
Home charging usually beats public on cost — often half the price or less. See home, Level 2 and DC fast pricing compared, with worked per-mile numbers.
Updated EVHow long does it take to charge an EV?
How long it takes to charge an EV, from overnight Level 2 to a 20–40 minute DC fast 10–80% top-up — with the simple math, a time table and a worked example.
Updated SolarHow many solar panels to power a house?
How many solar panels to power a house? About 20 for a typical home. Use your kWh, sun hours and panel wattage to size your own array — with worked numbers.
Updated Home energyHow to read your electricity bill
Decode your electricity bill line by line — supply vs delivery charges, flat, tiered and time-of-use rates, fees and taxes — and the fastest ways to cut it.
Updated SolarSolar panel cost: what you will actually pay
Residential solar runs about $3 per watt installed — roughly $18,000–$30,000 for a 6–10 kW system before the 30% federal credit. Here is the real breakdown.
Updated SolarSolar panel payback period explained
How long solar panels take to pay for themselves, the simple formula behind payback, what shortens or lengthens it, and how to estimate yours.
Updated Home energyWhat uses the most electricity in your home?
The biggest electricity users in a typical home are heating, cooling and water heating — here is how to rank your own loads and cut the costliest ones.
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