Solar panels
Panels are expected to be on the roof. Roof and attic routing can likely be finalized later; the key near-term question is how the eventual roof/attic pathway lands cleanly at the southeast main-panel area.
Home Renovation · Solar & Backup Prep
Whole-Home Backup & Smart Load Prep
Planning notes for preparing the Ventura house for future rooftop solar, batteries, whole-home backup, and smart load management. The main item that appears worth doing during the current renovation is hidden conduit through the walls at the southeast corner, because that area will be much harder to make clean later. Most other solar, battery, garage, west-wall, and attic work can likely be handled later with relatively little additional cost.
Current renovation priority: run hidden conduit through the walls in the southeast corner while the walls are open. Solar panels will be on the roof; the main panel will be at the southeast corner of the house; a sub-panel will be in the garage; future batteries may go inside the garage or outside on the west wall. Long runs can route through the attic later where practical. Visible conduit is acceptable in the garage and on the west wall, so those areas do not need the same level of pre-finish work now.
Roof solar arrayFuture PV on the roof. Preserve attic-to-roof and roof-to-electrical pathways without locking into a vendor.
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Main equipment: SE cornerMain panel / service area at the southeast corner. This is the current priority: hide conduit in the wall now so future exterior work stays visually clean.
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Garage / west wallGarage sub-panel and possible interior garage batteries, or exterior batteries on the west wall. Visible conduit is acceptable in these utility areas.
Known Equipment Locations
Main panel
Main service / main panel location is the southeast corner of the house. This is the most visible exterior utility area and the main place where hidden in-wall conduit is worth doing now.
Sub-panel
A sub-panel will be in the garage. The garage is utility space, so conduit and later smart-load work can remain accessible and visible without creating the same finish/aesthetic issue.
Battery option A: garage interior
Interior garage batteries may simplify weather exposure and service access, but final placement needs code, working-clearance, fire, manufacturer, and vehicle-impact review.
Battery option B: west exterior wall
Exterior batteries on the west wall are also plausible. Visible conduit is acceptable there, but pathways from the main equipment area should still be planned early so long runs are not improvised later.
Routing Strategy
| Area | Preferred rough-in approach | Reason |
|---|---|---|
| Roof → attic | Can likely be planned and installed later when the solar design is real. | Roof solar work will require a permitted solar installation anyway, and attic routing should remain accessible. |
| Attic long runs | Use the attic later for long east/west or roof-to-garage/west-wall conduit routes where practical. | Attic routing is comparatively serviceable later and avoids committing now to a vendor-specific architecture. |
| SE corner / main panel | Run hidden conduit through the wall now, with pull strings and clear labels. | This is the visually sensitive area where later surface conduit would be the most noticeable and hardest to hide. |
| Garage | Visible conduit is acceptable later; keep the sub-panel area accessible. | The garage is utility space, so later work should not carry much finish/aesthetic penalty. |
| West exterior wall | Visible conduit is acceptable later if batteries land there. | Exterior battery placement can be resolved with the final battery system and code/fire-clearance review. |
What to Do Now
Primary near-term item: SE corner conduit
Install empty conduit through the walls at the southeast corner so future solar/backup equipment can reach the main panel area without exposed surface conduit on the most visible exterior corner. Include pull strings, labels, and photos before closing the wall.
Coordinate rough size and endpoints
Have the electrician sanity-check conduit diameter, bend radius, pull access, and likely endpoints. The goal is not to solve the final battery design now; it is to avoid reopening finished walls or adding ugly exterior conduit later.
Defer garage / west wall conduit
Because visible conduit is acceptable in the garage and on the west wall, those runs can likely wait until the final solar/battery design is known.
Defer smart-load specifics
Smart panels, load modules, CTs, gateway equipment, and battery/inverter choices can likely wait. Labeling and access are useful, but the expensive decisions should align with the future system.
Whole-Home Backup vs. Critical-Loads Subpanel
The long-term target is whole-home backup with smart load management, not necessarily a small critical-loads-only subpanel. During renovation, the practical prep is narrower: preserve the hidden southeast-corner conduit path now, then let the final solar/battery designer handle most backup and load-management details later.
Working assumption: avoid prematurely forcing a vendor-specific battery architecture, smart panel, load module scheme, or critical-loads subpanel unless the electrician identifies a uniquely cheap or code-driven reason to do it now.
Discussion Points for Electrician / Solar Designer
- What hidden conduit should be run through the southeast-corner wall now so future solar/backup work can reach the main panel area cleanly.
- Recommended conduit size, count, bend radius, pull points, and labels for that southeast-corner rough-in.
- Where the conduit should stub out so it can later connect to attic routing, roof solar, garage sub-panel work, or west-wall/garage battery equipment.
- Whether any other rough-in item truly needs to happen now, or whether it can wait because garage, attic, and west-wall conduit can be added later without major finish/aesthetic cost.
- How to photograph and label the southeast-corner conduit before the wall is closed.
Pre-Drywall Documentation
- Photograph the southeast-corner conduit pathway, wall bays, pull-string locations, and any blocking before insulation and drywall.
- Label both ends of the empty conduit with destination, approximate route, and intended future use.
- Keep a simple routing sketch showing how future roof/attic runs could land at the southeast main-panel area.
Related Solar Notes
Sources / Context
- City of Ventura photovoltaic information
- City of Ventura contractor solar permits / SB 379
- U.S. Department of Energy: rooftop solar potential and PVWatts
This page replaces the prior “Plug-in Solar vs. Conventional Solar” overview with renovation-focused prep for future whole-home backup and smart load management.