Add Battery Storage

Want to Add Battery Storage to Your Existing Solar System?

If you already have solar panels but want backup power during outages or better savings under NEM 3.0, adding battery storage is one of the best upgrades you can make in 2026.

At Newbury Park Solar, we’ve successfully retrofitted hundreds of existing solar systems with modern battery storage across Ventura County and beyond. Whether your system is in the Conejo Valley, Los Angeles area, or further out, our local crews know how to integrate batteries cleanly and efficiently while working with SCE, PG&E, and other utilities.

Why Add a Battery to Your Current Solar Setup?

Homeowners across our service area choose to add storage for these practical reasons:

  • Store your own solar energy instead of exporting it to the utility at low NEM 3.0 rates (often just 5–8 cents per kWh)
  • Have reliable backup power during PSPS events, wildfires, or grid outages
  • Reduce evening and peak-time electricity bills by using stored power when rates are highest
  • Increase your home’s value and energy independence
  • Future-proof your solar investment for changing energy rules

Can We Add a Battery to My Existing Solar System?

Yes — in most cases we can.

We regularly retrofit systems with Enphase microinverters, SolarEdge optimizers, string inverters, and many older setups. AC-coupling is often the simplest and cleanest approach, allowing the battery to work alongside your existing solar array with minimal changes.

During a free assessment, we’ll review your inverter brand and model, system age and size, and electrical setup. We’ll give you honest feedback on compatibility, expected performance, and any small upgrades that may be needed.

We proudly serve homeowners throughout:

  • Ventura County
  • Santa Barbara County
  • Los Angeles County
  • Orange County
  • Kern County
  • San Bernardino County
  • Riverside County
  • San Diego County

Battery Options We Install

We recommend proven batteries that perform reliably in California’s varied climates and utility territories:

  • Enphase IQ Batteries — Excellent match for homes with Enphase microinverters; scalable and easy to monitor
  • Tesla Powerwall 3 — High-capacity whole-home backup with strong power output
  • Sigenergy SigenStor — Modular all-in-one systems that install cleanly and scale easily
  • Other quality options including FranklinWH and compatible solutions tailored to your needs and budget

We match the battery to your home, your energy usage patterns, and your goals — never a one-size-fits-all approach.

Our Straightforward Retrofit Process

We make the process simple and stress-free:

  1. Free Compatibility Check — Share your system details or schedule a quick site visit.
  2. Custom Recommendation — We design the right solution for your property and usage.
  3. Transparent Quote — Clear pricing with no surprises.
  4. Permitting & Utility Approval — We handle all paperwork with your local utility.
  5. Professional Installation — Our experienced crews complete the work cleanly and efficiently.
  6. Testing & Training — We verify everything works and teach you how to use the monitoring app.

Most battery retrofits are completed in 4–8 weeks from start to finish, depending on permitting timelines.

Common Questions from Homeowners

Will adding a battery affect my existing solar warranty?

No — when installed correctly with compatible equipment, your original solar warranty remains intact.

How much does it cost to add a battery in 2026?

Installed costs typically range from $12,000 to $30,000+ depending on capacity, type, and any electrical work needed. We’ll provide exact numbers for your home and discuss any current SGIP rebate opportunities (funds move quickly for qualifying households).

Can I add a battery to an older solar system?

Yes. We’ve successfully upgraded systems installed as far back as 2015 across our service area.

Are there any incentives available right now?

The federal ITC has ended for 2026 installations, but California’s SGIP program may still offer meaningful battery rebates in resiliency or equity tiers. We stay up to date and assist with applications.

Should I do whole-home backup or just critical loads?

We design both. Many homeowners start with essentials (refrigerator, lights, Wi-Fi, medical devices) and expand later if desired.

Ready to Add Battery Storage?

If you have an existing solar system anywhere in Ventura, Santa Barbara, Los Angeles, Orange, Kern, San Bernardino, Riverside, or San Diego Counties and want honest advice about adding battery storage, we’re here to help — no high-pressure sales, just practical expertise from a local installer.

Get Your Free Battery Compatibility Assessment


Or call us directly at (855) 385-4007. We respond quickly because we’re committed to serving our communities across Southern and Central California.

Newbury Park Solar — Experienced local installers for solar battery retrofits throughout California.