ADU loads, EV charging, and solar planning in Sherman Oaks 91423

ADU load should be modeled from the actual approved design

An ADU can add HVAC, water heating, cooking, refrigeration, laundry and possibly EV charging. Those loads should be estimated from the real permitted equipment rather than a generic square-foot assumption.

Ask whether the ADU shares the main service and meter and how the additional load affects the service calculation. The solar system should match the approved electrical configuration.

If the ADU is planned but not yet occupied, compare a current-load scenario with a post-occupancy scenario.

EV charging can magnify service-capacity questions

A Level 2 charger can be a large new circuit. Ask whether the existing service can support the ADU, EV charger, solar and any battery equipment together.

Managed charging or power sharing may reduce simultaneous demand when multiple EVs are expected. Ask whether those options are appropriate before defaulting to a larger service.

The solar model should state expected EV energy in kilowatt-hours, not just a vague future-growth percentage.

Battery backup should be coordinated across both living spaces

If the ADU and main house share the electrical system, decide which circuits in each space need backup. One dwelling may prioritize refrigeration and internet while the other needs medical or temperature-control loads.

Ask for continuous and surge power, usable storage, reserve settings and runtime under the selected circuits.

A battery system should be easy to explain from the backed-up loads, not just from the number of battery units on the proposal.

Roof and service work should not be hidden in one financing number

When solar, ADU electrical work, a charger and a battery are financed together, the monthly payment can hide which scope is driving cost. Request itemized cash prices.

Separate roof work, solar equipment, battery equipment, electrical service work and EV charging. Then compare the financing terms on top of those costs.

Tax-credit assumptions for mixed project scopes should be reviewed with a qualified tax adviser rather than treated as guaranteed sales discounts.

LADWP assumptions must match the actual account

Sherman Oaks is LADWP territory. Ask the installer to identify the current LADWP NEM/interconnection rules used in the savings model.

The proposal should show annual usage, future ADU and EV load, solar production, self-consumption, exports and any battery operation.

If the model uses SCE Solar Billing Plan language, it should be corrected.

LADBS permitting should connect the ADU and solar scopes

If solar is being designed while the ADU permit is still evolving, ask when the electrical design becomes final enough to size the array and service equipment confidently.

The contractor should identify who handles LADBS plan revisions, inspections and LADWP interconnection. Changes to the ADU electrical plan can affect the solar project.

Coordinate both projects before walls close and equipment locations become expensive to move.

Sherman Oaks 91423 homeowner checklist

Gather LADWP bills, ADU electrical plans, EV plans, service-panel information, roof condition and backup priorities.

Compare current and future load scenarios, solar size, battery capacity, electrical upgrades, roofing, permit scope and total project price.

Ask who provides long-term monitoring and service for both solar and storage.

How Home Solar Simplified reviews a solar proposal

Every local guide uses the same homeowner-first review standard so a proposal can be evaluated without relying on a sales presentation. Start with the home's actual electric bills and identify which future loads are genuinely likely: electric vehicles, heat pumps, electric water heating, pool equipment, an accessory dwelling unit, or battery storage. Ask the installer to separate today's usage from future assumptions instead of blending them into one unexplained annual number.

Next, compare the physical system. Write down the proposed DC system size, first-year production estimate, degradation assumption, module and inverter models, battery usable capacity and power rating if storage is included, roof planes used, shade assumptions, attachment method, equipment locations, and any service-panel or roofing work. The production model should match the final permitted layout. If panels move during engineering, HOA review, planning review, or permit corrections, request an updated production estimate before installation.

Then compare money on a cash-price basis before looking at monthly payments. Ask for the cash price of the solar array, battery, roof work, service upgrade, EV charger, trenching, permits, and other add-ons as separate line items. If financing is used, compare the financed amount, interest rate, term, dealer fees or prepaid finance charges, total scheduled payments, and prepayment rules. Tax-credit assumptions should be treated as estimates for discussion with a qualified tax professional, not as guaranteed discounts from the contractor.

Review the utility assumptions separately. The proposal should identify the actual electric utility, current rate structure, estimated self-consumption, exports, remaining grid purchases, and any battery dispatch strategy. A city, ZIP code, or neighboring home does not prove the exact service arrangement at a property. Utility rules, rates, interconnection requirements, and equipment eligibility can change, so the installer should confirm the current rules for the specific account before the homeowner relies on projected savings.

Finally, review responsibility after the sale. Ask who handles permit corrections, utility interconnection, inspection failures, monitoring problems, inverter or battery warranty claims, roof leaks near attachments, and future array removal for roof work. Keep the signed contract, approved plans, equipment cut sheets, inspection record, permission-to-operate documentation, warranties, and final one-line electrical diagram together. A solar project should remain understandable years after the original salesperson is gone.

When comparing two or three proposals, normalize them before deciding. Put the same fields into one worksheet: cash price, financed price, system size, first-year production, estimated annual consumption, future-load assumptions, battery capacity and power, roof work, service upgrades, permit responsibility, workmanship warranty, equipment warranties, monitoring support, and the estimated utility bill that remains. If one proposal uses a different roof layout, rate assumption, financing term, utility escalation rate, or battery operating strategy, mark that difference instead of treating the monthly payments as directly comparable. Ask each contractor to correct obvious assumption mismatches so the homeowner is comparing systems on equal footing. The lowest payment is not necessarily the lowest project cost, the largest array is not necessarily the best value, and the highest production estimate is not necessarily the most credible. A useful comparison makes the assumptions visible enough that a homeowner can explain why one proposal is stronger without repeating a salesperson's slogan.

Related homeowner research

Adjacency QA: ZIP-to-ZIP links are topical and geographic-navigation links, not claims of municipal physical adjacency.

Frequently asked questions