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A battery added to a California apartment building’s solar system is not automatically a personal investment for its tenants. First find out which utility tariff the building uses, how solar credits are allocated to your account, and whether you would pay anything toward the battery. Under the state’s Net Billing Tariff, export credits depend on when power is sent to the grid—not on a single statewide “pennies per kilowatt-hour” rate.
Why solar exports may earn less—and why batteries enter the conversation
California’s Solar Billing Plan, formally the Net Billing Tariff (NBT) and often called NEM 3, values exported electricity according to its value to the grid. That means export compensation is not necessarily equal to the retail price customers pay for imported electricity. The California Public Utilities Commission (CPUC) says new interconnection applicants in covered investor-owned utility territories have taken service under the NBT since April 15, 2023. CPUC: Net Billing Tariff
The export value varies with timing and tariff details; there is no universal fixed cents-per-kilowatt-hour figure that applies to every hour, utility, or account. CPUC: Net Billing Tariff
What a battery can change
A battery can store some daytime solar generation for later use, including in the evening, rather than sending all excess power to the grid when it is produced. The CPUC describes the basic idea this way: “Pairing a battery with your solar system allows you to store excess solar energy from daytime hours for use in the evening.” CPUC: California Solar Consumer Protection Guide
#1 Best Overall
- Double-Sided Battery Organizer: The Ontel Battery Daddy is a compact & portable way to organize, store and protect a boatload of batteries! Clear 'Easy View' cover lets you see everything at a glance and prevent any unwanted contact
- Maximize Battery Organization: Battery Daddy uses both sides to store up to 180 batteries of various sizes and types. This sleek, compact battery case holds 76 AA, 72 AAA, 8 9-Volt, 10 C, 12 Coin Cell and 8 D batteries (Batteries not included)
- Help Prevent Battery Drainage: Don't let loose batteries touch and drain other batteries. Stay organized and be prepared for power outages or battery-operated household items like remote controls, flashlights, toys and emergency gadgets
- Battery Tester Included: This battery storage case comes with a tester that can check whether your single-use or rechargeable batteries are still good. Align the battery's positive and negative ends on the tester to view the result on the indicator
- Durable and Portable Design: With a clear locking lid, secure latches, and a built-in carrying handle for easy portability and storage in many drawers, shelves or emergency kits. Great for professionals, technicians or anyone needing batteries on the go
That is a general operating principle, not proof that a particular apartment renter will save money. In a shared building, the tariff, account credits, battery purpose, and payment arrangement determine whether any added value reaches your bill.
How shared building solar differs from rooftop solar you own
For many multifamily buildings in the territories covered by the CPUC’s Virtual Net Billing Tariff (VNBT), the property owner sets a prearranged allocation of solar generation credits among tenant and common-area utility accounts. Solar power is metered onto the grid, and credits are applied to participating accounts according to that arrangement. The renter does not necessarily own the panels or control the allocation. CPUC: Virtual Net Billing Tariff
Rank #2
- Double-Sided Battery Organizer: The Ontel Battery Daddy is a compact & portable way to organize, store and protect a boatload of batteries! Clear 'Easy View' cover lets you see everything at a glance and prevent any unwanted contact.
- Sleek and Compact Design: Battery Daddy uses both sides to store up to 150 batteries of all types. Holds 58 AAs, 68 AAAs, (4) 9 Volt, 8 Cs, 8 Ds, & 8 Button Cells. Easily stores away in any drawer. Includes Battery Tester
- Find the Right Battery: Incorrect storage drains batteries. Stay organized and be prepared for power outages, new gifts, or any time you need to replace a dead battery. Built-in carrying handle lets you take it anywhere
- Battery Tester Included: Battery Daddy comes with a tester that can check whether your single-use or rechargable batteries are still good. Just align the negatives and positives of the batteries on the tester and you can see the result on the indicator
- Easy Storage: The compact size allows for storage in drawers and shelves along with your other supplies and household items. The portable design has a sturdy carrying handle and secure heavy-duty latches so you can easily transport
The CPUC says VNBT information mostly applies in Pacific Gas and Electric (PG&E), Southern California Edison (SCE), and San Diego Gas & Electric (SDG&E) territories, with exceptions for qualifying Solar on Multifamily Affordable Housing (SOMAH) and Multifamily Affordable Solar Housing (MASH) arrangements. A building may also have a legacy Virtual Net Energy Metering (VNEM) arrangement. Ask the property manager which tariff and program actually apply rather than assuming the building follows the newer tariff. CPUC: Virtual Net Billing Tariff
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Credits can be handled differently
Under VNBT, residential beneficiary accounts receive 15-minute interval netting: consumption is netted against allocated generation over each interval. Export compensation is based on the Avoided Cost Calculator (ACC). These are distinct parts of the tariff; neither implies that every renter receives the same credit or a fixed export rate. The utility, account, allocation, and tariff terms matter. CPUC: Virtual Net Billing Tariff
Rank #3
- Fireproof Explosion Proof Waterproof: Fireproof Battery Organizer Case is made of upgraded non-itchy silicone coated fiberglass that can withstand temperatures up to 2000. It's also highly water-resistant. And the special material has a certain explosion-proof performance, we design this Battery Organizer Box to minimize the hazards and losses caused by battery explosion
- Stores For More Type Batteries: It can hold 79*AA, 56*AAA, 8*C, 6*D, 9*9V, 30*Button type batteries( 3V lithium - CR 2032,CR 2016,CR 1632, CR 2025,LR44 etc.), total over 200 batteries. Keeping your batteries organized and helps extend the life of your batteries
- Safely Stores Batteries: Our fireproof battery organizer bag features a double zipper and durable handle to keep batteries from shock in the event that a defective battery were to swell, leak, or explode, our bag is designed to contain this and keep your family safe. This battery case neatly holds the batteries snugly in place within the foam pre-cut slots and keeps the contact ends from contacting each other, making it easy for you to find whatever battery
- Lightweight & Portable Battery Box Containers: You can not only hang the battery pouch on the wall, put it in a storage room or drawer and anywhere away from fire, but also take it with you on trips and to various outdoor activities. It is suitable for birthdays, New Year, Christmas, Valentine's Day, Mother's Day, Father's Day and many other holidays
- Please Note: BATTERIES NOT INCLUDED. YOHAWJER included a battery tester is suitable for all types of batteries with the organizer but Does NOT include any batteries. Super convenient for you to distinguish which batteries need to be recycled
Request the written tenant credit-allocation terms and a recent utility bill showing how credits appear. Without those, a building-wide solar production claim cannot tell you what benefit is assigned to your account.
Questions to ask before judging a battery proposal
- Which utility serves the building, and which tariff applies? Ask whether the project is under VNBT, legacy VNEM, or an eligible SOMAH/MASH arrangement. Confirm the answer against the property’s utility documents.
- How much generation is allocated to my account? Request the allocation terms and a recent bill with the solar credits visible. Find out whether an allocation changes when a battery is installed.
- What will the battery do? Ask whether it is intended for shared onsite use, exporting power at selected times, backup during outages, or a combination. The intended use affects where potential value goes.
- Who owns and pays for it? Ask whether tenants face a direct charge or an indirect cost through rent, fees, or another building charge. Ask how any additional battery-related value will be reflected in tenant bills.
- What evidence supports the claimed savings? Request a calculation based on the building’s tariff, utility accounts, credit allocations, battery operation, and costs—not a generic export price or a rooftop-solar payback estimate.
The CPUC tariff descriptions explain how credits and exports can be treated, but they do not establish savings for a particular renter or building. A project-specific bill impact requires the building’s documents and account details. CPUC: Virtual Net Billing Tariff
Rank #4
- Portable battery storage box with battery tester
- Can hold 110 total batteries, including 36 AAA, 48 AA, 4 C, 4 D, 4 9V, 14 coin cells
- Carrying handle for easy portability; wall mountable
- Battery tester included; tests 1.5V and 9V batteries for usability
- Transparent cover allows you to see batteries without opening the lid
What the adoption-era VNBT incentive figure does—and does not—tell you
A November 2023 CPUC fact sheet described a residential monetary adder lasting nine years, available to new customers for five years and stepping down during that period. That was an adoption-era description of tariff design, not a current per-kilowatt-hour rate or a guarantee that a renter, building, or proposed battery qualifies now. Confirm current eligibility and applicable terms with the utility and property manager before relying on it. CPUC: Virtual Net Billing Tariff fact sheet
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A personal solar contract is different from receiving credits through a landlord-managed shared system. Under a power purchase agreement (PPA), the provider owns the system and sells its electricity. If you move before the lease or PPA ends, the agreement may require paying remaining value or transferring it. Read the ownership, payment, transfer, and early-move terms before signing. CPUC: California Solar Consumer Protection Guide
Quick Recap
Best Value
- Set of 4 - Two AA and Two AAA Battery Storage Boxes, Each Box Provides Storage for up to 48 Batteries – “Batteries Are Not Included”
- The Strong and Secure Locking Latch Design Keeps Batteries Neatly Organized and Safely Protected Inside the Storage Box.
- Includes Four Movable Dividers Per Box to Create Smaller Compartments - Also Great for Separating Live Batteries from Dead.
- Constructed from High Impact Plastic Material - Good for Storing and Organizing Your Batteries While Traveling or Camping Etc.
- Dimensions: AA Box, Length, 7 ½” X Width, 4 ¾” X Height, 1 ¼” - Dimensions: AAA Box, Length, 6” X Width, 4” X Height, 1”
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
