Home battery backup,
NEM 3.0 ready.

Tesla Powerwall, Enphase IQ Battery, and FranklinWH whole-home installation across San Jose and the South Bay. PSPS backup, peak-rate offset, and self-consumption sizing for the post-NEM-3.0 grid. Licensed C-10, fully insured, federal tax credit documentation included.

  • 13.5-40kWhCommon residential sizing
  • 1-4 daysInstall window
  • 30%Federal tax credit eligible

What we do

From a single Powerwall to a whole-home system.

NEM 3.0 reset the math on solar in California. Export rates dropped, and self-consumption with a battery became the path to reasonable payback. PG&E PSPS events made the resilience case on top. Monte Power & Electric handles the full electrical scope: gateway, ATS or partial backup panel, conductors, AHJ permit, PG&E PTO paperwork, and start-up.

Tesla Powerwall 3 with built-in solar inverter, Enphase IQ Battery 5P with microinverter ecosystem, and FranklinWH for high-capacity whole-home backup. We spec to the loads you actually want covered, not the brochure number, and we don't sell solar panels you don't need.

  • 13.5-40kWh Sizing range across single and stacked configurations.
  • 1-4 days Install window depending on retrofit complexity.
  • $2M General liability coverage on every job.

By battery platform

Sized to the loads
and the inverter you already have.

Battery choice depends on whether you have existing solar, what inverter you're running, how much storage you want, and whether you're going whole-home or essential-load. Walk us through the property and we'll spec the right platform.

01

Tesla Powerwall 3

Most-installed in San Jose

13.5kWh per unit, integrated solar inverter, expandable up to four units. The default for new solar-plus-storage installs and for existing-solar retrofits where the inverter is at end of life.

  • 13.5kWh per unit, stack to 4
  • Built-in solar inverter
  • 11.5kW continuous output
  • Whole-home or essential-load
02

Enphase IQ Battery

For Enphase ecosystems

5P or 10C class. AC-coupled, microinverter-friendly, and the natural fit for any home already running Enphase IQ7 or IQ8 microinverters. Modular sizing in 5kWh and 10kWh blocks.

  • 5kWh, 10kWh modular
  • AC-coupled, retrofit-friendly
  • Microinverter-native
  • System Controller required
03

FranklinWH aPower 2

High-capacity whole-home

15kWh per unit, expandable to 60kWh in a stack of four. Higher continuous and surge output than most competitors, useful for homes with multiple ACs, EVs, or heat pumps. AC-coupled.

  • 15kWh per unit, stack to 4
  • Higher surge output
  • AC-coupled retrofit ready
  • Multiple AC and EV homes
04

Solar plus battery retrofit

NEM 3.0 path forward

Adding a battery to an existing NEM 2.0 or NEM 3.0 solar system. AC-coupled retrofit keeps the existing inverter where it makes sense. DC-coupled when the inverter is end-of-life and the math favors a swap.

  • AC-coupled retrofit
  • DC-coupled with new inverter
  • NEM 2.0 grandfathering check
  • PG&E PTO paperwork handled

Why South Bay homes add storage

NEM 3.0, PSPS, and electrification all push the same direction.

Battery storage moved from luxury to standard for San Jose homeowners over the last two years. The eight reasons below are the ones we hear during the on-site walk most often.

  • NEM 3.0 export rates dropped roughly 75 percent versus NEM 2.0
  • PSPS shutoffs hit the property every fire season
  • Time-of-use peak rates push self-consumption math
  • Heat pump heating with no gas furnace fallback
  • EV charging as the household's only transportation
  • Existing solar stranded under NEM 3.0 export pricing
  • Working from home with critical-uptime needs
  • Federal tax credit at 30 percent on storage, with or without solar

How a battery install goes

Five steps from
quote to PTO.

Same disciplined sequence whether the project is a single Powerwall or a four-battery whole-home stack. The crew that designs the install runs the install and the start-up.

  1. 01

    Scope

    On-site walk. Existing inverter review, panel headroom check, location and clearance check, AHJ rules confirmed. No charge.

  2. 02

    Quote

    Itemized quote with line items for batteries, gateway, partial backup panel if needed, conductors, permit, PTO paperwork, and start-up.

  3. 03

    Permit

    Electrical permit pulled. AHJ inspection scheduled. PG&E interconnection application submitted in parallel.

  4. 04

    Install

    Mounting, conduit, conductors, gateway, and battery placement. Panel rework or partial backup panel where the existing service can't take the new circuits.

  5. 05

    Commission & PTO

    Start-up, app commissioning, AHJ inspection, and PG&E permission to operate. Tax credit paperwork delivered with the closeout package.

Quick answers

Battery backup
questions.

Six of the most-asked. More on the dedicated contact page or by phone.

  • How many batteries do I need?
    Most San Jose homes run one or two batteries for essential-load backup, three or more for whole-home. Sizing depends on AC, EV charging, and how long you want the system to ride out a PSPS event.
  • Does battery backup make sense under NEM 3.0?
    Yes. NEM 3.0 cut export rates roughly 75 percent versus NEM 2.0, which makes self-consumption with a battery the path to a reasonable solar payback. We size the battery to capture daytime production and offset peak-rate evening usage.
  • Can I add a battery to my existing solar?
    Yes. AC-coupled retrofits work with most existing inverters. DC-coupled systems require a Powerwall 3 or compatible all-in-one inverter. We confirm the right approach during the on-site walk.
  • Is there still a tax credit?
    The federal Residential Clean Energy Credit is currently 30 percent for qualifying battery storage. Standalone batteries qualify, and so do batteries paired with solar. We provide the documentation your tax preparer needs.
  • Where can the battery be installed?
    Garage walls, exterior side yard with appropriate enclosure rating, and indoor utility rooms are all common. Setbacks and fire-code clearances are governed by the local AHJ. We confirm the location during the site walk.
  • How long does install take?
    A single Powerwall on an existing solar system runs one day. A multi-battery whole-home install with new gateway, panel rework, and PG&E coordination runs two to four days.

Related work

Ready when you are

Get a quote on the
battery system.

Walk us through the property, the existing solar, and the loads you want covered. We'll come back with sizing, brand options, and a date.

Get an estimate Call 408-630-0548