HOME BATTERY BACK UP
The Complete Buyer's Guide
to Home Backup Batteries in 2026
Finally, a solution for that unused solar power.
California homeowners are generating more solar energy than ever — but without a battery, that excess power goes straight back to the grid, often at low reimbursement rates. A home battery changes that. It stores the energy your panels produce and makes it available when you actually need it: at night, during peak rate hours, or when the power goes out.
Phoenix Energy Solutions has been helping Sacramento Valley and El Dorado County homeowners get more out of their solar investment since 2009. Whether you're adding a battery to an existing solar system or planning a new installation, we'll help you find the right solution for your home and budget.
Is a Home Battery Worth It?
For most California solar homeowners, the answer is yes — especially since NEM 3.0 changed the way utilities compensate you for energy sent back to the grid. Under the new rates, storing your own energy and using it later is often more valuable than selling it to the utility.
Beyond the financial case, a battery gives you real peace of mind. Wildfires, heatwaves, and grid stress mean outages are increasingly common across our service area. A home battery keeps your lights on, your refrigerator running, and your family comfortable when the grid goes down — automatically, with no generator noise or fuel to manage.
COMPARING BATTERY TYPES AND COSTS
Enphase IQ Battery 5P
The Enphase IQ Battery 5P is the current generation of Enphase's home battery line, built on safer lithium iron phosphate (LFP) chemistry. Each unit is modular and stackable — add more units as your needs grow.
IQ Battery 5P Specs:
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5.0 kWh usable energy per unit
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3.84 kW continuous / 7.68 kW peak output
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Six embedded microinverters per unit
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LFP chemistry for added safety and longevity
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15-year warranty — longest in the industry
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7,000 cycle rating
Photo Credit: Enphase Energy
COMPARING BATTERY TYPES AND COSTS
Tesla’s Powerwall 3
The Tesla Powerwall 3 is one of the most powerful and popular home battery options available in 2026. Unlike its predecessor, the Powerwall 3 includes a built-in solar inverter, simplifying installation for new solar customers.
Tesla Powerwall 3 Specs
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13.5 kWh usable energy
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11.5 kW continuous / 22 kW peak output
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97.5% round-trip efficiency
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Built-in solar inverter
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10-year parts warranty
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Stack up to 4 units (plus up to 3 expansion units) for a maximum of 54 kWh total storage
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Dimensions: 43.25" H x 24" W x 7.6" D
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Weight: 287 lbs (130 kg)
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Recommended Operating Temperature: -4°F to 122°F / -20°C to 50°C
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Floor or wall-mounted, indoor or outdoor
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Rated for up to 100% humidity
Photo Credit: Tesla
COMPARING BATTERY TYPES AND COSTS
LG Energy Solution RESU Prime 16H
LG's RESU Prime series is the updated line from LG Energy Solution (formerly LG Chem). The 16H Prime is their flagship residential model, offering high capacity and strong power output suitable for larger homes.
RESU Prime 16H Specs:
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16 kWh total / 15.2 kWh usable
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7 kW continuous / 11 kW peak output
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95% round-trip efficiency
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400V high-voltage system
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10-year warranty / 6,000 cycles
Photo Credit: LG Energy Solution
COMPARING BATTERY TYPES AND COSTS
Sonnen eco Gen 3
Sonnen is a premium German-engineered battery brand known for longevity and smart energy management. The eco Gen 3 uses LFP chemistry and is modular — available in sizes from 10 kWh to 60 kWh, making it ideal for larger homes or higher backup requirements.
Sonnen eco Gen 3 Specs:
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Available in 10–60 kWh configurations
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LFP chemistry — extremely safe and long-lasting
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10-year / 10,000-cycle warranty
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Includes smart energy management software
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Can be paired with solar or used as standalone storage
Photo Credit: Sonnen Batterie
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How Many Batteries Do I Need?
It depends on how much energy your home uses and what you want to back up. A single Tesla Powerwall or Enphase IQ Battery is enough to run essential appliances — lights, refrigerator, phone charging, and some outlets — through a typical overnight outage. For whole-home backup or multi-day coverage, you may need two or more units.
The best way to size your system correctly is to have one of our energy experts review your utility bills and solar production data. We'll recommend a system that matches your actual needs — not an oversized one that costs more than necessary.
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Time of Use Home Batteries
PG&E and SMUD both use time-of-use (TOU) pricing, meaning electricity costs more during peak hours — typically late afternoon through evening. With a home battery, you can charge during off-peak hours when rates are low and draw from your battery when rates are high, reducing your monthly bill significantly.
If you drive an electric vehicle, this becomes even more valuable — you can charge your car from stored solar or off-peak grid power instead of paying peak rates.
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How Home Batteries Help With Avoided Costs
California's shift to NEM 3.0 means the days of generous solar export credits are largely over. Utilities now pay significantly less for excess solar energy sent back to the grid — in some cases as little as 3–5 cents per kWh, while charging you 30–40 cents per kWh when you buy it back during peak hours.
A home battery closes that gap. Instead of exporting your cheap solar power and buying back expensive grid power in the evening, you store what you produce and use it when it counts. Over time this can make a meaningful difference to your monthly bill — and the 30% federal tax credit through the Inflation Reduction Act makes the upfront investment more affordable than ever.
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Which Home Battery Is Right for Me?
The honest answer is: it depends on your home, your solar system, and your goals. That's exactly why we don't sell one-size-fits-all solutions.
We primarily install Tesla Powerwall 3 and Enphase IQ Battery 5P systems — two of the most reliable, widely supported options available in California. Both integrate seamlessly with existing solar systems and come with strong manufacturer warranties and app-based monitoring.
The best way to find the right fit is a free consultation with our team. We'll look at your energy usage, your existing solar setup if you have one, and what you want the battery to do — then give you a straightforward recommendation with no pressure.
Call us at 916-716-5650 or schedule a free estimate online.