How many watts does it take to run a house in 2026?

A typical Southern California house draws somewhere between 1,000 and 1,500 watts when things are calm — think refrigerator humming, a few lights on, a TV, and a handful of devices on standby. Flip on a 3-ton central air conditioner and you're suddenly pulling 3,000–5,000 additional watts, and if you also run the pool pump, a load of laundry, and an EV charger at the same time, your instantaneous demand can easily clear 7,000–10,000 watts.

Last verified: July 2026 by Helios Energy Global.

Understanding your home's wattage demand is the foundation of every solar and battery conversation. It determines how large a solar array you actually need, how long a battery will last during an outage, and whether a single battery unit is enough or you need two.

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Watts vs. kilowatt-hours: the distinction that matters

Before diving into appliance numbers, it's worth being precise about two terms that get mixed up constantly.

• Watts (W) and kilowatts (kW) measure power — the rate at which electricity is being used right now, like miles per hour on a speedometer.
• Kilowatt-hours (kWh) measure energy — the total amount consumed over time, like the odometer reading.

A 3,000W (3 kW) air conditioner running for two hours uses 6 kWh of energy. Your utility bill is denominated in kWh; your solar inverter and battery are rated in kW (power output) and kWh (storage capacity). Both numbers matter, and they answer different questions.

For how many kWh per day is normal for a Southern California home, see our companion guide: How many kWh per day is normal for Southern California?

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Per-appliance wattage: the numbers that drive the math

The table below covers the loads that most dramatically affect solar sizing and battery runtime decisions. "Running watts" is steady-state draw; "surge watts" is the brief spike at startup (motors and compressors pull 2–3× their running draw for a fraction of a second — your battery and inverter must handle this peak, not just the average).

Appliance	Running watts (est.)	Surge watts (est.)	Notes
Central AC – 2-ton (24,000 BTU)	2,000–2,500W	4,500–6,000W	Most common in SoCal condos/smaller homes
Central AC – 3-ton (36,000 BTU)	2,800–3,500W	6,000–8,000W	Typical 1,500–2,500 sq ft SoCal house
Central AC – 5-ton (60,000 BTU)	4,500–6,000W	10,000–14,000W	Larger homes; may exceed single-battery output
Refrigerator (modern)	100–200W	400–800W	Runs ~30–50% of the time
Electric water heater	3,500–5,500W	Same (resistive)	Heat pump water heaters: 500–1,000W running
Dishwasher	1,200–1,800W	~2,000W	Heating element is the main draw
Clothes dryer (electric)	4,000–6,000W	~6,500W	One of the largest 240V loads
Pool pump (1 HP)	750–1,000W	2,000–3,000W	Variable-speed pumps can cut this by 50–70%
Level 2 EV charger (48A)	~11,500W	~11,500W	Dedicated 240V/60A circuit; huge continuous load
Level 2 EV charger (32A)	~7,700W	~7,700W	More common residential install
Lighting (whole home, LED)	200–600W	Minimal	LED retrofit dramatically reduces this
TV + streaming devices	100–300W	Minimal	Depends on screen size and count
Home office (2 computers + monitors)	200–500W	Minimal
Baseline "always-on" loads combined	1,000–1,500W	—	Fridge + lights + electronics + standby

All figures are estimates based on manufacturer data ranges and EIA residential consumption data. Actual draw varies by equipment age, efficiency rating, thermostat settings, and usage habits.

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What this means for solar sizing in Southern California

Solar is sized in kilowatts of panel capacity (kW-DC), not in running watts, because the goal is to produce enough energy (kWh) over a day to offset what you consume — not necessarily to match your peak instantaneous demand (that's the battery's job during outages).

A rough sizing framework for SoCal:

• Average daily usage for a Southern California home runs roughly 20–35 kWh/day, higher in summer with AC.
• Southern California gets excellent solar production — Los Angeles averages roughly 5.5–6 peak sun hours per day (NREL PVWatts data for the region).
• A 7 kW system producing ~5.8 peak sun hours × 7 kW × ~80% real-world derate = roughly 32–33 kWh/day in summer — a reasonable fit for a mid-sized home.
• Most residential installs in our service area land between 6 kW and 12 kW, at approximately $2.40–$3.25 per watt installed before incentives.

The utility matters a lot here. If you're an SCE customer, you're on NEM 3.0 (the CPUC Net Billing Tariff), which pays you significantly less for exported solar than the old retail rate — making battery storage far more valuable, because you want to use your solar production rather than export it cheaply. LADWP customers still receive retail-rate net metering, which changes the battery math considerably.

See our NEM 3.0 explainer and solar vs. battery under NEM 3.0 for the full breakdown.

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What this means for battery backup: the wattage ceiling

This is where wattage — not just kWh — becomes critical. A battery's power output rating determines what it can run simultaneously during an outage, regardless of how much energy is stored.

A single Powerwall-class battery (the most common residential unit) outputs approximately 11.5 kW continuous and handles surge loads up to around 22 kW for a few seconds. That sounds like a lot, but look at the numbers:

Scenario	Approximate load	Within single battery?
Essentials only: fridge + lights + phone charging	~800–1,200W	✅ Comfortably
Essentials + 2-ton AC	~3,000–3,700W	✅ Yes
Essentials + 3-ton AC + pool pump	~4,500–5,500W	✅ Yes, but watch surge
Essentials + 3-ton AC + Level 2 EV charger (48A)	~15,000–16,000W	❌ Exceeds single unit
Full home with 5-ton AC + dryer + EV charger	~20,000W+	❌ Needs 2+ batteries

The practical takeaway: Most SoCal homeowners can run their critical loads — AC, refrigerator, lighting, devices — on a single battery. Running a Level 2 EV charger simultaneously with air conditioning typically requires either a second battery or a smart load-management panel that prevents simultaneous operation.

For whole-home backup planning, visit our whole-home backup page. To model your specific appliances and see estimated runtime interactively, use our battery runtime calculator.

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SoCal-specific factors that push demand higher

A few things make Southern California homes particularly demanding:

Heat and AC runtime. Inland areas (San Bernardino, Riverside, the San Fernando Valley) routinely hit 100°F+ in summer, pushing AC runtime to 8–12 hours per day. Coastal homes (Santa Monica, Manhattan Beach) may barely run AC at all. The difference in annual kWh consumption between an inland and coastal home of the same size can be 30–50%.

Pool pumps. Southern California has one of the highest pool-per-capita rates in the country. A single-speed 1 HP pump running 8 hours draws roughly 6–8 kWh/day — equivalent to running your refrigerator for a month. Upgrading to a variable-speed pump before sizing solar can meaningfully reduce the system you need.

EV adoption. SCE territory has among the highest EV ownership rates in the U.S. A single EV charging overnight at Level 2 (32A) adds roughly 30–40 kWh/night to a home's consumption — sometimes doubling total household usage and requiring a meaningfully larger solar array.

SCE's 4–9 PM TOU peak. Under SCE's standard time-of-use rates (approximately 34–35¢/kWh on-peak vs. ~18–22¢/kWh off-peak, per SCE rate filings), running high-wattage loads during the afternoon peak is expensive. A battery charged by solar and discharged during that window is the primary financial tool for SCE customers under NEM 3.0.

LADWP customers face a different calculus: average rates around 22¢/kWh with retail-rate net metering still in place. The urgency for battery storage is lower, but the economics of solar alone are strong.

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How to estimate your own home's wattage demand

You don't need to add up every appliance manually. Three practical approaches:

1. Check your utility bill. SCE and LADWP both show monthly kWh usage. Divide your highest summer month by 30 to get average daily kWh, then divide by 24 for a rough average kW draw. This won't show peaks, but it anchors the conversation.

2. Use a smart panel or energy monitor. Devices like a smart electrical panel or a clip-on CT monitor give you real-time and historical watt readings by circuit. A 2–4 week monitoring period before a solar consultation produces the most accurate sizing data.

3. Ask us to run a load analysis. During a free consultation, we walk through your bill history, major appliances, and any planned changes (EV, pool, additions) to produce a site-specific load estimate before recommending a system size.

Visit our solar panel cost page for current pricing ranges, or explore solar options to understand panel and inverter choices.

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Frequently asked questions about home wattage and solar sizing

How many watts does a 2,000 square foot house use?

Square footage alone doesn't determine wattage — the appliances inside do. A 2,000 sq ft SoCal home with central AC, a pool pump, and an EV charger might peak at 12,000–15,000W, while the same footprint with a mini-split, no pool, and no EV might peak at 4,000–5,000W. Use your utility bill's kWh data as the more reliable starting point.

Can a single battery run my whole house during an outage?

For most loads, yes — a Powerwall-class battery outputting ~11.5kW continuous can handle AC, refrigerator, lighting, and most plug-in devices simultaneously. The exception is stacking large 240V loads: running a Level 2 EV charger and central AC and an electric dryer at the same time can exceed a single unit's output. A second battery or a smart load controller solves this. See our batteries page for configuration options.

What's the difference between watts and kilowatt-hours on my solar proposal?

Watts (or kilowatts) measure power — how fast electricity flows at a given moment. Kilowatt-hours measure energy — the total amount consumed or produced over time. Your solar proposal will show panel capacity in kW-DC and estimated annual production in kWh. Both numbers matter: kW tells you peak output, kWh tells you whether you'll offset your annual bill.

Does running a pool pump really affect my solar system size?

Yes, meaningfully. A conventional single-speed 1 HP pool pump running 8 hours/day adds roughly 6–8 kWh/day to your home's consumption. Over a year, that's 2,200–2,900 kWh — enough to require an additional 1–2 solar panels to offset. Upgrading to a variable-speed pump first, then sizing solar, is often the more cost-effective sequence.

How does SCE's TOU peak affect which appliances I should run on battery?

SCE's peak window runs roughly 4–9 PM at approximately 34–35¢/kWh (per current SCE rate filings). The highest-wattage appliances you can shift out of that window — dishwasher, laundry, EV charging — save the most money. Under NEM 3.0, solar panels produce during the day but export at low rates; a battery stores that production and discharges it during the 4–9 PM peak, replacing expensive grid power with free solar energy.

Is SGIP battery rebate money available in 2026?

The Self-Generation Incentive Program (SGIP) residential battery incentive is waitlisted as of 2026 — budget rounds have been exhausted and new applicants are placed on a waitlist with no guaranteed timeline for funding. We track SGIP status and will notify customers if new allocations open. Don't size your battery decision around SGIP availability right now.

How large a solar system do I need if I'm adding an EV?

A Level 2 EV charger (32A) adds roughly 30–40 kWh per night of charging, depending on the vehicle and how depleted the battery is. That's a substantial increase — often 50–100% of a home's prior daily consumption. For an SCE customer adding an EV, we typically recommend sizing the solar array to cover both existing home usage and projected EV miles, then pairing with battery storage to avoid charging from the grid during the 4–9 PM peak.

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Next steps

• Book a free consultation and custom design — we'll run a load analysis specific to your home and utility, and size solar and battery to your actual demand.
• Estimate your savings with our design tool — enter your address and bill for a preliminary system size and savings projection.
• See battery runtime estimates for your appliances — interactive calculator for outage planning.
• Explore battery storage options — single vs. stacked configurations, output ratings, and backup scenarios.
• Understand your solar options — panel types, inverter choices, and what goes into a SoCal install.
• See current solar pricing — 2026 cost ranges before and after available incentives.
• Read: How many kWh per day is normal for Southern California? — the energy companion to this wattage guide.
• Whole-home backup planning — for homeowners who want to run everything during an outage.