Blog

News and energy tips from the Hans Energy team.

Company news, seasonal tips, and quick reads on HVAC, solar, batteries, and EV charging across San Diego County. Looking for in-depth guides? Visit the Learning Center.

Go deeper than blog posts. Cost guides, comparisons, and troubleshooting for San Diego homeowners.

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Time-of-Use (TOU) Rate Plans: Pre-Cooling vs. Battery Discharging

Keeping the house cool at 4 PM shouldn't trigger massive utility penalties. Find out if super-cooling your home early or relying on solar battery storage is the smartest move for late-summer comfort.

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Should I Turn Off My AC If I Smell Burning Dust?

A burning odor from your vents during a hot August afternoon is a major red flag. Find out why an overworked blower motor causes this and when to shut your system down completely.

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How Rodents Use Chewed Flex Ducts to Escape the August Heat

If your AC runs nonstop but the house won't cool down, the equipment might be fine. Pests seeking relief from 130°F attic temperatures often destroy ductwork, causing sudden cooling failures.

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Dealing with Coastal Marine Layer Impact on Morning Solar Production

When the coastal marine layer lingers into late summer, your solar panels aren't broken—they're just waiting for the sun. Find out how to shift your heavy energy usage to maximize afternoon output.

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Mini-Splits vs. Extending Ductwork for that Unpermitted Garage Conversion

Tapping into your existing HVAC for a new ADU might seem easy, but it can trigger code violations and overwork your system. See why a dedicated ductless unit is often the safer choice.

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Why Did My Smart Thermostat Lock Me Out During the Heatwave?

Waking up sweating because your AC is stuck on an 'Energy Savings Event' is incredibly frustrating. Learn why utility programs take control and how to opt out.

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The Real Reason Your Upstairs Master Bedroom is Always 10 Degrees Hotter

Struggling to sleep while your downstairs freezes? Heat rise and restricted airflow are causing this extreme temperature imbalance. Here is how to permanently balance your home.

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Preparing Your Solar Battery Backup for Rolling August Blackouts

When late-summer heatwaves strain the grid, having a battery isn't enough if your app settings are wrong. Adjust your reserve capacity now to prioritize outage protection over daily savings.

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Why Inland Valley Homes Need Different Tonnage Than Coastal Properties

A 15-degree temperature gap separates the coast from inland valleys like Poway. Using generic coastal rules for your AC sizing will leave your home sweating through late-summer heatwaves.

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Pleated vs. Fiberglass Filters During Peak Fire Season

Buying the thickest filter to block late-summer wildfire smoke might actually suffocate your air conditioner. Learn how to balance indoor air quality with AC health.

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Can I Hose Down My Condenser Unit to Make It Run Cooler?

Spraying your AC with a garden hose during an August heatwave might seem like a smart hack. Understand the risks of thermal shock and why cold water can warp hot metal fins.

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The Mechanics of How Wildfire Ash Blocks Solar Panel Efficiency

When late-summer wildfires fill the sky, oily ash bakes onto your solar panels. This creates a stubborn barrier that causes a sudden drop in energy production.

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Maximizing Solar Export Credits Before the Fall Rate Changes Kick In

Running your AC through peak summer heat shouldn't drain your grid credits. Strategic daily timing protects your net metering bank before TOU schedules shift this autumn.

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How Oversized AC Units Actually Cause Short-Cycling and Higher Bills

Buying the biggest air conditioner doesn't guarantee a cooler home—it often guarantees the opposite. Understand why an oversized system leads to poor humidity control and frequent breakdowns.

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Navigating Title 24 Requirements When Upgrading Your Ductwork in Older Tract Homes

If your older Poway home struggles to stay cool in July, leaky attic ducts are often to blame. Understanding Title 24 energy codes ensures your duct upgrade actually solves the problem.

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Microinverters vs. String Inverters When Your Roof Has Partial Palm Tree Shading

Moving palm tree shadows can severely bottleneck traditional solar arrays during peak summer. See exactly how different inverter technologies handle uneven light to protect your energy production.

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Is It Normal for My Inverter to Hum Loudly During Peak Afternoon Sun?

Hearing a loud buzzing from your solar equipment during the hottest part of the day can be alarming. Discover why high electrical loads cause this midday noise and how to spot real warning signs.

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The Hidden Toll Hard Water Takes on Evaporative Coolers

Hard water silently calcifies evaporative cooler pumps, often causing motors to seize during peak July heat. Recognize the early warning signs of mineral scale buildup before your system breaks down.

Rebates & Incentives

San Diego Solar & Battery Rebates and Incentives: What's Available and How to Claim It

The incentive landscape changed hard at the end of 2025: federal residential credits expired, while California's SGIP battery rebate remains the workhorse — largest for medical-baseline customers and high-fire-threat areas. Here is what a San Diego homeowner can still claim and exactly how the process works.

Cost Guides

How Much Does AC Replacement Cost in San Diego?

A full AC replacement in San Diego typically lands between $8,000 and $16,000 installed — higher with duct replacement or a panel upgrade, lower for a straightforward condenser-and-coil swap. Here is where the money goes, what Title 24 adds, and the questions that keep a quote honest.

Cost Guides

How Much Does Solar Panel Installation Cost in San Diego County?

Typical San Diego County rooftop solar runs in the $2.50–$4.00 per watt installed range — roughly $15,000–$28,000 for a 6–8 kW system before incentives, more with a battery. What moves the number: system size, roof complexity, panel and inverter tier, panel-upgrade needs, and storage.

Comparisons

Level 1 vs. Level 2 EV Charging at Home: What San Diego Drivers Actually Need

Level 1 adds 3–5 miles of range per hour from a standard outlet; Level 2 adds 20–40. For most San Diego commutes Level 2 is the difference between managing charge and never thinking about it — and it unlocks charging during cheap or solar-powered hours. The comparison table settles it.

Comparisons

Tesla Powerwall vs. Enphase IQ Battery: Which Fits a San Diego Home?

Powerwall 3 favors whole-home backup and high solar input through one integrated unit; Enphase IQ batteries favor modular sizing and pair naturally with Enphase microinverter systems. The right answer usually falls out of three questions about your home — here is the side-by-side.

Comparisons

Heat Pump vs. AC + Furnace: Which Is Right for a San Diego Home?

San Diego's mild winters are close to ideal heat-pump territory: one machine replaces both the AC and the furnace, runs at 300–400% effective efficiency, and never needs a gas flue. Here is the honest side-by-side — including the cases where keeping gas still wins.

Comparisons

AC Repair vs. Replacement in San Diego: How to Decide Without Wasting Money

Repair usually wins when the system is under 10 years old and the fix is electrical; replacement usually wins past 12–15 years, for compressor or refrigerant-circuit failures, or when the old system runs phased-out R-410A or R-22. Use the $5,000 rule and this comparison table to decide.

Maintenance & How-It-Works

How Does NEM 3.0 Net Billing Work for San Diego Solar Owners?

Under NEM 3.0 net billing, SDG&E pays you the avoided-cost rate for exported solar — a fraction of the retail rate you pay to import. That one change reshapes system design in San Diego: self-consumption and batteries now drive the economics instead of raw export.

Maintenance & How-It-Works

The San Diego HVAC Maintenance Checklist: What to Do Each Season (and What to Leave to a Pro)

San Diego HVAC systems need a spring cooling tune-up, a fall heating check, and monthly filter attention during fire season. This seasonal checklist splits the work into what homeowners can safely do and what requires a NATE-certified technician.

Maintenance & How-It-Works

How Does Home Battery Backup Work During a San Diego Power Outage?

A home battery detects a grid outage and switches your essential circuits to stored power in a fraction of a second — and if you have solar, the panels keep recharging it the next morning. Here is how the transfer works, what a battery can realistically run, and why plain grid-tied solar shuts off in a blackout.

Troubleshooting

Why Does My EV Charger Keep Tripping the Breaker? What San Diego Homeowners Should Know

An EV charger that trips its breaker points to one of five causes: an undersized or shared circuit, a loose connection, heat, a GFCI conflict, or a failing charger. In older San Diego homes with 100-amp panels, the circuit — not the charger — is usually the problem.

Troubleshooting

Why Is My AC Blowing Warm Air? A San Diego Troubleshooting Checklist

An AC that runs but blows warm air usually has one of six causes: a thermostat setting, a dirty filter, a tripped breaker, a frozen coil, a failing capacitor, or a refrigerant leak. Here is the safe checking order for San Diego homeowners — and the point where DIY must stop.

Troubleshooting

Why Is My Solar System Producing Less Power? 7 Causes San Diego Homeowners Can Check

Most sudden solar production drops in San Diego County come from one of seven causes — dust and coastal grime, shading, a tripped breaker, an inverter fault, monitoring gaps, panel damage, or normal seasonal dips. Here is how to check each one safely before calling for solar panel repair.

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Does Running the AC Fan Constantly Actually Improve Indoor Air Quality?

Leaving your thermostat fan set to ON might seem like a smart way to filter out dust, but it can actually pull unconditioned air and humidity back into your home.

News and energy tips from the Hans Energy team.

Time-of-Use (TOU) Rate Plans: Pre-Cooling vs. Battery Discharging

Should I Turn Off My AC If I Smell Burning Dust?

How Rodents Use Chewed Flex Ducts to Escape the August Heat

Dealing with Coastal Marine Layer Impact on Morning Solar Production

Mini-Splits vs. Extending Ductwork for that Unpermitted Garage Conversion

Why Did My Smart Thermostat Lock Me Out During the Heatwave?

The Real Reason Your Upstairs Master Bedroom is Always 10 Degrees Hotter

Preparing Your Solar Battery Backup for Rolling August Blackouts

Why Inland Valley Homes Need Different Tonnage Than Coastal Properties

Pleated vs. Fiberglass Filters During Peak Fire Season

Can I Hose Down My Condenser Unit to Make It Run Cooler?

The Mechanics of How Wildfire Ash Blocks Solar Panel Efficiency

Maximizing Solar Export Credits Before the Fall Rate Changes Kick In

How Oversized AC Units Actually Cause Short-Cycling and Higher Bills

Navigating Title 24 Requirements When Upgrading Your Ductwork in Older Tract Homes

Microinverters vs. String Inverters When Your Roof Has Partial Palm Tree Shading

Is It Normal for My Inverter to Hum Loudly During Peak Afternoon Sun?

The Hidden Toll Hard Water Takes on Evaporative Coolers

San Diego Solar &amp; Battery Rebates and Incentives: What's Available and How to Claim It

How Much Does AC Replacement Cost in San Diego?

How Much Does Solar Panel Installation Cost in San Diego County?

Level 1 vs. Level 2 EV Charging at Home: What San Diego Drivers Actually Need

Tesla Powerwall vs. Enphase IQ Battery: Which Fits a San Diego Home?

Heat Pump vs. AC + Furnace: Which Is Right for a San Diego Home?

AC Repair vs. Replacement in San Diego: How to Decide Without Wasting Money

How Does NEM 3.0 Net Billing Work for San Diego Solar Owners?

The San Diego HVAC Maintenance Checklist: What to Do Each Season (and What to Leave to a Pro)

How Does Home Battery Backup Work During a San Diego Power Outage?

Why Does My EV Charger Keep Tripping the Breaker? What San Diego Homeowners Should Know

Why Is My AC Blowing Warm Air? A San Diego Troubleshooting Checklist

Why Is My Solar System Producing Less Power? 7 Causes San Diego Homeowners Can Check

Does Running the AC Fan Constantly Actually Improve Indoor Air Quality?

AC Replacement Timeline: The Ultimate Guide

What Happens When Dust Accumulates Under Your Solar Panels During a Dry Spell

Best AC Filters for San Diego Homes: An Essential Guide

Ultimate Checklist for Low GWP Refrigerant Shift

The Ultimate Guide to Heat Pump vs Furnace

How to Maintain Heat Pump Efficiently With These Easy Changes

The Ultimate Guide to Heat Pump Advantages for Year Round Comfort

A Quick Start Guide to How a Home EV Charger Saves Time and Money

A-Z Guide to Pairing Solar and EV Charging for Carbon Savings

How to Understand Panel Upgrade Benefits for Solar and EV Charging

SDGE Rebates for San Diego Homeowners: Essential Guide

Why Some Air Conditioners Fail Earlier in Hot Regions and How to Stop It

Coastal AC Care: How Often Should You Really Service Your Unit?

Why Good Insulation is Your AC’s Best Friend

Average Lifespan of Modern High Efficiency Air Conditioners Explained

The Science of How High Efficiency AC Units Slash Energy Bills

How Long Do Air Conditioners Last in Coastal Environments?

Airflow Design: The Secret to Maximum Cooling Efficiency

How to Thaw Your Frozen AC This Summer

The Homeowner’s Survival Guide: What to Expect During Air Conditioner Installation

7 Signs Your AC is Ready to Retire

The Reason Your AC Never Takes a Break in Summer

How to Fix Weak Airflow When It’s Sizzling Outside

Why Skipping AC Maintenance is a Recipe for a Meltdown

The Mystery of the Afternoon AC Shutdown Solved

Why Your Electric Bill Skyrockets When the Temperature Soars

Beating the Heat When Your AC Can’t Keep Up

Ductless vs Central Air: The Ultimate Summer Showdown

How to Set Your Thermostat for Maximum Summer Comfort

Radiant Floor Heating vs Forced Air for Your Home

How Radiant Heating Systems Work Their Magic

7 Reasons Your New Room Addition Needs a Mini Split

How to Apply for Energy Rebates in California

Beginner’s Guide to How Josh Hans Built a Family Company Focused on Energy Efficiency

Say Goodbye to That One Freezing Room Forever

Stop Burning Cash: The Link Between AC Tune-Ups and Lower Bills

Troubleshooting Tips When Your AC Is Blowing Warm Air

How Hans Energy Systems Promotes a Greener Future

When to Consider Radiant Heating for a Cozier Home

Why Ductless is the Perfect Match for Southern California Weather

Don’t Wait for a Meltdown: When to Schedule Your AC Service

Cold as Ice: How to Fix a Frozen AC Unit

Compare Single-Company Solar HVAC & Electrical Benefits

Pro Tips for Maintaining Your Boiler and Radiant System

The Homeowner Guide to Zoned Energy Savings

What is Under the Hood? Your AC Tune-Up Checklist Revealed

The Ultimate Thermostat Troubleshooting Guide for Homeowners

San Diego Solar & Battery Rebates and Incentives: What's Available and How to Claim It

The Ultimate Guide to Tesla Model 3 & Y Home Charger Installation

X Solar Panel Installation Poway Companies That Are Proven to Be Reliable