Batteries

Enphase IQ Battery 10C vs FranklinWH aPower 2

Side-by-side comparison based on specs, real pricing, and our crew's installation experience. Updated for 2026.

Marcus R.Senior Solar Engineer

NABCEP PV Installation Professional·Updated Apr 2026

Enphase

FranklinWH

9.5

Choose Enphase IQ Battery 10C if:

Best overall battery for Enphase solar systems
10 kWh in a compact form factor (62% less space per kWh than 5P)
Homeowners who want high power with Enphase ecosystem
Gen4 technology with highest cycle count warranty

$13,000 installed

Choose FranklinWH aPower 2 if:

True whole-home backup with highest capacity (15 kWh)
Homes with high-draw appliances (central AC, well pumps, EV chargers)
Generator integration — seamless hybrid backup
Maximum power output (10 kW continuous, 15 kW peak)

$17,500 installed (with aGate)

Spec-by-Spec Comparison

Specification

Enphase IQ Battery 10C

FranklinWH aPower 2

Price

$13,000 installed

$17,500 installed (with aGate)

Warranty

15 years

Usable Capacity

10 kWh

15 kWh

Continuous Power

7.08 kW

10 kW

Peak Power

14.16 kW (10 sec)

15 kW (10 sec)

Round-trip Efficiency

96% DC / 90% AC

89%

Chemistry

LFP (Lithium Iron Phosphate)

Weight

310 lbs (141 kg)

331 lbs (150 kg)

Dimensions

32.0 x 42.0 x 12.6 in

43.5 x 30.0 x 14.6 in

Operating Temp

-15°C to 55°C

-20°C to 55°C

Connectivity

Enphase Envoy + Wi-Fi

FranklinWH aGate + Wi-Fi/Ethernet

NuWatt Rating

9.5/10

9/10

Pros & Cons

Enphase IQ Battery 10C

Pros

+10 kWh in a single compact unit — double the 5P capacity
+7.08 kW continuous power — enough for most essential loads
+6,000-cycle guarantee — 50% more cycles than the 5P
+15-year warranty — tied for longest in lineup
+62% less wall space per kWh than the 5P
+Gen4 architecture with improved thermal management

Cons

-$1,300/kWh — still premium pricing vs Tesla or Franklin
-Brand new (mid-2025) — less field history than 5P
-Requires Enphase IQ System Controller for backup
-Cannot mix with 5P units on the same system

FranklinWH aPower 2

Pros

+15 kWh capacity — largest single residential battery
+10 kW continuous / 15 kW peak — handles heavy loads
+aGate controller manages loads intelligently via app
+IP67 waterproof — install anywhere, indoor or outdoor
+Seamless generator integration for extended outages
+Scales up to 15 batteries per aGate (225 kWh)

Cons

-$17,500 installed — highest total cost (includes aGate)
-aGate required — adds $3,000-4,000 to system cost
-Heavier than competitors at 330+ lbs
-Smaller installer network than Tesla or Enphase

Installation Notes from Our Crew

Enphase IQ Battery 10C

The IQ 10C is Enphase's Gen4 flagship battery. It's heavier than the 5P (310 lbs vs 185 lbs), so we bring a two-person crew. The install is similar to the 5P — wall-mount, connect to IQ System Controller, configure via Enphase app. The 7 kW continuous power is enough to back up essential loads plus a mini-split AC. For whole-home backup, we recommend two 10C units.

FranklinWH aPower 2

The aPower 2 is our whole-home backup champion. The aGate controller installs next to the main panel and handles automatic load management — it can prioritize circuits and integrate with a generator for extended outages. Total install runs 5-7 hours with a two-person crew. IP67 rating means we can mount it outdoors without a shelter. Best choice when the customer wants to back up everything including central AC and EV charger.

Frequently Asked Questions

Is the Enphase IQ Battery 10C or FranklinWH aPower 2 better?

The Enphase IQ Battery 10C scores 9.5/10 vs 9/10 in our rating. It excels at: best overall battery for enphase solar systems. The FranklinWH aPower 2 is the better choice if: true whole-home backup with highest capacity (15 kwh). The right pick depends on your specific situation.

How much does the Enphase IQ Battery 10C cost vs the FranklinWH aPower 2?

The Enphase IQ Battery 10C costs $13,000 installed. The FranklinWH aPower 2 costs $17,500 installed (with aGate). Both prices include professional installation by NuWatt Energy. State incentives may reduce your net cost — use our calculator for exact pricing.

Which has a better warranty?

The Enphase IQ Battery 10C has a 15-year warranty (15-year product & performance warranty with 6,000-cycle guarantee). The FranklinWH aPower 2 has a 15-year warranty (15-year warranty with 60 MWh throughput guarantee). Both offer the same warranty length.

Does NuWatt install both the Enphase IQ Battery 10C and FranklinWH aPower 2?

Yes. NuWatt Energy installs both products and our crew has hands-on experience with each. We can help you choose based on your home, energy goals, and budget during a free consultation.

Can I switch from Enphase to FranklinWH later?

In most cases, yes. Batteries can be added to or replaced in existing solar systems. The main consideration is inverter compatibility and electrical panel capacity. Contact NuWatt for a specific assessment of your system.

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Spec-by-Spec Comparison

Specification

Enphase IQ Battery 10C

FranklinWH aPower 2

Price

$13,000 installed

$17,500 installed (with aGate)

Warranty

15 years

Usable Capacity

10 kWh

15 kWh

Continuous Power

7.08 kW

10 kW

Peak Power

14.16 kW (10 sec)

15 kW (10 sec)

Round-trip Efficiency

96% DC / 90% AC

89%

Chemistry

LFP (Lithium Iron Phosphate)

Weight

310 lbs (141 kg)

331 lbs (150 kg)

Dimensions

32.0 x 42.0 x 12.6 in

43.5 x 30.0 x 14.6 in

Operating Temp

-15°C to 55°C

-20°C to 55°C

Connectivity

Enphase Envoy + Wi-Fi

FranklinWH aGate + Wi-Fi/Ethernet

NuWatt Rating

9.5/10

9/10

Pros & Cons

Enphase IQ Battery 10C

Pros

+10 kWh in a single compact unit — double the 5P capacity
+7.08 kW continuous power — enough for most essential loads
+6,000-cycle guarantee — 50% more cycles than the 5P
+15-year warranty — tied for longest in lineup
+62% less wall space per kWh than the 5P
+Gen4 architecture with improved thermal management

Cons

-$1,300/kWh — still premium pricing vs Tesla or Franklin
-Brand new (mid-2025) — less field history than 5P
-Requires Enphase IQ System Controller for backup
-Cannot mix with 5P units on the same system

FranklinWH aPower 2

Pros

+15 kWh capacity — largest single residential battery
+10 kW continuous / 15 kW peak — handles heavy loads
+aGate controller manages loads intelligently via app
+IP67 waterproof — install anywhere, indoor or outdoor
+Seamless generator integration for extended outages
+Scales up to 15 batteries per aGate (225 kWh)

Cons

-$17,500 installed — highest total cost (includes aGate)
-aGate required — adds $3,000-4,000 to system cost
-Heavier than competitors at 330+ lbs
-Smaller installer network than Tesla or Enphase

Installation Notes from Our Crew

Enphase IQ Battery 10C

FranklinWH aPower 2

Frequently Asked Questions

Is the Enphase IQ Battery 10C or FranklinWH aPower 2 better?

How much does the Enphase IQ Battery 10C cost vs the FranklinWH aPower 2?

Which has a better warranty?

Does NuWatt install both the Enphase IQ Battery 10C and FranklinWH aPower 2?

Yes. NuWatt Energy installs both products and our crew has hands-on experience with each. We can help you choose based on your home, energy goals, and budget during a free consultation.

Can I switch from Enphase to FranklinWH later?

Update Location

Enphase IQ Battery 10C vs FranklinWH aPower 2

Choose Enphase IQ Battery 10C if:

Choose FranklinWH aPower 2 if:

Spec-by-Spec Comparison

Pros & Cons

Enphase IQ Battery 10C

Pros

Cons

FranklinWH aPower 2

Pros

Cons

Installation Notes from Our Crew

Enphase IQ Battery 10C

FranklinWH aPower 2

Frequently Asked Questions

Related Comparisons

Not Sure Which to Choose?

Ready to start your clean energy project?

Enphase IQ Battery 10C vs FranklinWH aPower 2

Choose Enphase IQ Battery 10C if:

Choose FranklinWH aPower 2 if:

Spec-by-Spec Comparison

Pros & Cons

Enphase IQ Battery 10C

Pros

Cons

FranklinWH aPower 2

Pros

Cons

Installation Notes from Our Crew

Enphase IQ Battery 10C

FranklinWH aPower 2

Frequently Asked Questions

Related Comparisons

Not Sure Which to Choose?