Shopping for home backup power in Sonoma County often starts with a search and a pile of product names that quickly blur together. The systems worth comparing for solar battery installation are permanently mounted home batteries that wire directly into your electrical panel and switch on automatically the moment the grid goes down.
Below, we compare the two most commonly installed options so you schedule a consultation knowing what questions to ask.
Key Takeaways
- The Tesla Powerwall 3 stores 13.5 kWh per unit with up to 11.5 kW of continuous power, enough to run most home loads from a single unit.
- The Enphase IQ Battery 10C starts at 10.0 kWh per unit with up to 7.08 kW of continuous power, and scales modularly, so you can size to your budget now and expand later.
- Your best fit depends on your home’s load, existing solar equipment, and how much of your house you need backed up during a grid outage.
What Is the Enphase IQ Battery 10C?
The Enphase IQ Battery 10C is a home battery system built around Enphase’s microinverter technology. Each unit stores 10.0 kWh of usable energy, delivers 7.08 kW of continuous power, and can burst to 13.44 kW for short surges like appliance startups.
Enphase is headquartered in Fremont, CA (with its roots in Petaluma), which means parts availability and local support have historically been strong in the North Bay.
Specs at a glance:
- Capacity per unit: 10.0 kWh
- Continuous power: 7.08 kW per unit (not including Enphase solar when offgrid)
- Peak power: 13.44 kW (3 seconds)
- Max system size: 80 kWh (up to 8 units)
- Recharge sources: Solar and grid
- Round-trip efficiency: 90%
- Warranty: 15 years
- Chemistry: Lithium Iron Phosphate (LFP, a battery chemistry known for stable performance and lower fire risk)
The 10C uses AC coupling with embedded microinverters, so it integrates directly with existing Enphase solar systems in most cases. It also retrofits onto other solar setups, though the complexity varies by inverter type.
What Is the Tesla Powerwall 3?
The Tesla Powerwall 3 is a home battery system with a hybrid solar/storage inverter. One unit stores 13.5 kWh and puts out up to 11.5 kW of continuous power, more than enough for most California homes to run normally during an outage, without manually shutting anything off.
Specs at a glance:
- Capacity per unit: 13.5 kWh
- Continuous power: 15.4 kW
- Peak power: 44.4 kW
- Max system size: 94.5 kWh (up to 4 units + 3 expansion packs)
- Recharge sources: Solar and grid
- Round-trip efficiency: 97.5%
- Warranty: 10 years
- Hybrid solar/storage: Yes
The built-in inverter simplifies new installations by reducing total hardware. Synergy Solar is a T3 Tesla Energy Certified Installer, which reflects both advanced technical training and installation volume requirements met by the team.
Why This Decision Matters in Sonoma County
PG&E outages in Sonoma County can last multiple days. A system sized below your actual load leaves critical circuits without power when you need them most.
A few factors specific to this area:
Compatibility with existing equipment
If your roof already has Enphase microinverters, the IQ Battery 10C often integrates without additional hardware. If you’re starting from scratch with a new solar system, the Powerwall 3’s built-in inverter can reduce total component count and cost.
Local permitting
Both systems require permits in Sonoma County. Synergy handles all permit applications and PG&E interconnection paperwork in-house, which removes a significant burden from the homeowner’s plate.
Choose the Enphase IQ Battery 10C If:
- You already have an Enphase microinverter system on your roof
- A 15-year warranty period is important to your planning
- Phased system sizing fits your current budget
Choose the Tesla Powerwall 3 If:
- You want whole-home backup from a single unit
- You’re installing new solar and prefer fewer total components
- Higher round-trip efficiency (97.5%) matters to your energy math
Why Sonoma County Homeowners Trust Synergy Solar
Synergy Solar has been installing home battery storage since 2013. They install both Enphase and Tesla systems and design based on your home and load profile.
What shapes their recommendation:
- Your existing solar setup and inverter type
- Which loads you need backed up during a outage event
- Your PG&E rate structure and NEM status
- Local fire code and permit requirements specific to your jurisdiction
- Long-term system monitoring and support
Every installation includes a 10-year Synergy labor warranty (with an optional extension up to 15 years to match the manufacturer warranty). Owners Justin and Mike stay involved through every project. All electrical work is completed in-house under their C46 and C10 licenses, no subcontracting.
What to Do Next
- Pull your last 12 months of PG&E bills. Synergy uses your actual usage data to size a system accurately. You can download this through PG&E’s Green Button portal.
- Schedule a free on-site consultation. Synergy does not estimate over the phone because accurate system design requires a roof and panel inspection.
- Come with your backup priorities. Tell your consultant which loads matter most during a shutoff. That shapes the system recommendation more than any spec sheet will.
Safety note
Home battery installation involves high-voltage electrical work and requires permits in Sonoma County. Always use a licensed contractor. Synergy Solar holds both a C46 Solar Contractor license and a C10 Electrical Contractor license, and performs all work in-house.
Talk to Synergy Solar About Home Battery Storage
Synergy Solar provides free in-person consultations for homeowners across Sonoma County. If you’ve compared your options and want a clear answer for your specific home and utility situation, the site visit is where that conversation starts.
Reach out to our professional team today!
📞 Call Synergy Solar: (707) 244-7300