Are SunPower batteries still available? And what do existing customers do if they have warranty issues? At PowerOutage.us, we know home battery backups need to be dependable.
PowerOutage.us aggregates live data from 950+ utilities serving 200+ million customers. We have monitored every major outage event since 2016, including Hurricane Helene (4.79 million customers), Hurricane Milton (3.4 million Florida customers), and Winter Storm Fern from January 23 to January 27, 2026 (1,005,641 customers at peak).
Those events inform how we discuss usable capacity, solar recharge windows, and realistic runtimes when grid repairs take days. Let’s dig into what SunPower was and is today.
What is a SunPower battery today?
A SunPower battery today usually means either a legacy SunPower SunVault battery already installed on a home or a SunPower-installed Enphase battery system sold after the 2024 transition. Either way, Complete Solaria owns the SunPower brand name and is the business entity behind the products and services.
SunVault was SunPower’s flagship home energy storage line for outage backup and energy shifting when paired with solar. SunVault is no longer sold as a new SunPower battery product, and current battery installs through the SunPower name generally use Enphase systems. These have active manufacturer warranty support.
Can you still get SunPower SunVault batteries?
DIYers can purchase "orphaned" SunVault units through liquidation specialists like Beene Brothers or on eBay for roughly $1,500 to $2,500. However, these 48V LFP batteries require specific CAN bus keep-alive signals to stay active. Repurposing them typically requires a dedicated communication bridge or custom controllers to function without the original SunPower hub.
SunPower bankruptcy
In August 2024, SunPower Corp. filed for voluntary Chapter 11 bankruptcy to facilitate a sale of its core business units and begin an orderly wind-down of remaining operations.
As part of this restructuring, SunPower entered into a "stalking horse" agreement with Complete Solaria, led by CEO T.J. Rodgers. The deal includes:
- Blue Raven Solar: SunPower’s primary residential installation arm.
- New Homes Business: Its division is dedicated to solar integration for homebuilders.
- Dealer Network: The company’s non-installing dealer assets.
Complete Solaria agreed to acquire these assets for $45 million in cash, assuming certain related liabilities. While SunPower intended to maintain operations for these specific units during the bankruptcy process, it sought to liquidate all other assets and eventually exit the market.
The move signaled SunPower's transition from a major independent corporation to a brand under new ownership focused on residential installation.
What changed for SunPower customers?
SunPower’s 2024 bankruptcy fundamentally changed the relationship between the company and its customers. Since the old SunPower was liquidated, your coverage and support are now split across several entities based on your system’s age and type.
- The service split: If your system was installed before September 30, 2024, you are a legacy customer. Complete Solaria (the new SunPower) did not assume liability for your installation or labor warranties.
- Labor warranty loss: The once-famed "Complete Confidence" warranty (covering labor and shipping for 25 years) is effectively gone for legacy owners. You must now pay out-of-pocket for service visits.
- Equipment coverage: Your hardware is still covered, but you must deal directly with manufacturers like Maxeon (for panels) or Enphase (for inverters). Note the SunPower SunVault battery was manufactured by SunPower, so its warranty is gone for purchases before September 30, 2024.
- Leases and monitoring: Leased systems are now managed by SunStrong Management. Customers report monitoring through the mySunPower app (now SunStrong Connect) has transitioned to a "freemium" model, where advanced data tracking requires a paid subscription.
SunPower battery warranty status
Systems installed before Sept 30, 2024: The original SunPower "Complete Confidence" warranty for the SunVault essentially expired with the bankruptcy. Since SunPower was the primary manufacturer/integrator, there is no "backup" manufacturer (like Maxeon for panels) obligated to provide free labor or parts.
Systems installed after Sept 30, 2024: If you bought a SunVault through Complete Solaria (the New SunPower) or Blue Raven Solar, they are honoring those specific warranties. Enphase batteries come with support through Enphase.
SunPower SunVault technical support and repairs
Because the SunVault uses complex software and internal components from various suppliers (like Schneider Electric for some internal inverters), getting repairs is tricky:
- Software/App: The mySunPower (now SunStrong Connect) app still works for many people, but updates have been few. If your battery goes offline or stops communicating, you may need a technician who specifically knows how to use the Schneider Insight Gateway (the internal brain of the SunVault) to reset it.
- Third-Party Specialists: Several independent service companies have popped up to fill the void. Firms like Kick Electric and Solar Discovery specialize in "orphaned" SunPower systems. Companies like these have a high success rate in fixing SunVault software glitches that local electricians can’t handle.
- Proprietary Parts: Some internal wiring and communication boards were proprietary to SunPower. If a major internal board fails, it may be difficult to find a direct replacement. Some owners are choosing to decommission the SunVault and replace it with an Enphase 5P or Tesla Powerwall 3, for example.
What to do if your SunVault fails
Here are a few things to try if your SunVault battery has failed:
- Try a hard reset: There is a specific reboot sequence involving the breakers in the Hub+ and the power button on the battery itself. Note: Only do this if you are comfortable with your electrical panel.
- Contact your dealer: If you used a local authorized dealer (rather than SunPower directly), they may have spare parts or a technician trained in the SunVault's PVS6 monitoring system.
- Check for Enphase upgrades: Enphase has released a SunPower Monitoring Kit that allows their app to talk to SunPower systems, though full integration with the SunVault battery specifically is still limited.
Current SunPower Battery Offerings (Enphase 10C and 5P)
Since the restructuring, SunPower (under Complete Solaria) has shifted its primary energy storage focus to Enphase hardware. This includes the Enphase IQ Battery 10C and Enphase IQ Battery 5P. These systems are modular, allowing you to stack units to meet your home's specific power needs.
| Feature | Enphase IQ Battery 5P | Enphase IQ Battery 10C |
|---|---|---|
| Storage capacity | 5 kWh | 10 kWh |
| Continuous output | 3.84 kW | 7.08 kW |
| Peak output (10s) | 6.14 kW | 14.16 kW |
| Average installed cost per unit | $8,500 – $10,500 | $13,000 – $15,000 |
| Best use case | Small essential loads | Whole-home/HVAC backup |
| Max units per system (stacked) | 16 | 8 |
| Total capacity (stacked) | 80 kWh | 80 kWh |
| Max continuous power (stacked) | 61.44 kW | 56.64 kW |
Backup and storage performance
- The 5P (Power Model): The Enphase IQ Battery 5P is a high-power, smaller-capacity unit. It is designed to deliver a lot of "burst" energy to start heavy appliances (like well pumps or small AC units) but will drain faster due to its 5 kWh size.
- The 10C (Capacity Model): The Enphase IQ Battery 10C is the flagship 2026 offering. It doubles the storage of the 5P in a more compact footprint than previous generations. A single 10C can typically run a standard home's essential loads (fridge, lights, Wi-Fi, and some outlets) for roughly 12–16 hours.
- Scalability: Both Enphase battery systems are modular. For true off-grid style backup or for large homes with multiple AC units, installers typically recommend a minimum of two 10C units (20 kWh total) or four 5P units.
Bottom line on SunPower battery options
To recap, after its 2024 bankruptcy, SunPower’s assets were acquired by Complete Solaria, which now operates the brand as a residential installer. New installations use Enphase batteries with 15-year support. However, "legacy" customers (pre-September 2024) generally lost labor warranties and must now pay out-of-pocket for service.