Batteries

Enphase IQ Battery 5P 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

8.5

Choose Enphase IQ Battery 5P if:

Homes with Enphase microinverter systems
Modular expansion (stack multiple 5 kWh units)
Essential load backup on a budget
Long warranty peace of mind

$8,500 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 5P

FranklinWH aPower 2

Price

$8,500 installed

$17,500 installed (with aGate)

Warranty

15 years

Usable Capacity

5 kWh

15 kWh

Continuous Power

3.84 kW

10 kW

Peak Power

7.68 kW (10 sec)

15 kW (10 sec)

Round-trip Efficiency

96% DC / 90% AC

89%

Chemistry

LFP (Lithium Iron Phosphate)

Weight

185 lbs (84 kg)

331 lbs (150 kg)

Dimensions

26.1 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

8.5/10

9/10

Pros & Cons

Enphase IQ Battery 5P

Pros

+96% DC round-trip efficiency — best in class
+15-year warranty — tied for longest available
+Modular: add units as needs grow (up to 16 per system = 80 kWh)
+Seamless Enphase app monitoring with IQ microinverters
+No single point of failure (distributed architecture)
+LFP chemistry — safest battery technology

Cons

-Only 5 kWh per unit — need multiples for whole-home backup
-$1,700/kWh — highest cost per kWh in our lineup
-Requires Enphase IQ System Controller for backup
-3.84 kW continuous — limited power per unit

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 5P

Our crew mounts the IQ 5P on a garage or basement wall in about 3 hours per unit. It pairs directly with the Enphase IQ System Controller — no separate gateway needed. We typically recommend 2-3 units for essential load backup or 4+ for near whole-home coverage. The modular approach means you can start small and add units later without rewiring.

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 5P or FranklinWH aPower 2 better?

The FranklinWH aPower 2 scores 9/10 vs 8.5/10 in our rating. It excels at: true whole-home backup with highest capacity (15 kwh). The Enphase IQ Battery 5P is the better choice if: homes with enphase microinverter systems. The right pick depends on your specific situation.

How much does the Enphase IQ Battery 5P cost vs the FranklinWH aPower 2?

The Enphase IQ Battery 5P costs $8,500 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 5P has a 15-year warranty (15-year product & performance warranty with 4,000-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 5P 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 5P

FranklinWH aPower 2

Price

$8,500 installed

$17,500 installed (with aGate)

Warranty

15 years

Usable Capacity

5 kWh

15 kWh

Continuous Power

3.84 kW

10 kW

Peak Power

7.68 kW (10 sec)

15 kW (10 sec)

Round-trip Efficiency

96% DC / 90% AC

89%

Chemistry

LFP (Lithium Iron Phosphate)

Weight

185 lbs (84 kg)

331 lbs (150 kg)

Dimensions

26.1 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

8.5/10

9/10

Pros & Cons

Enphase IQ Battery 5P

Pros

+96% DC round-trip efficiency — best in class
+15-year warranty — tied for longest available
+Modular: add units as needs grow (up to 16 per system = 80 kWh)
+Seamless Enphase app monitoring with IQ microinverters
+No single point of failure (distributed architecture)
+LFP chemistry — safest battery technology

Cons

-Only 5 kWh per unit — need multiples for whole-home backup
-$1,700/kWh — highest cost per kWh in our lineup
-Requires Enphase IQ System Controller for backup
-3.84 kW continuous — limited power per unit

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 5P

FranklinWH aPower 2

Frequently Asked Questions

Is the Enphase IQ Battery 5P or FranklinWH aPower 2 better?

How much does the Enphase IQ Battery 5P cost vs the FranklinWH aPower 2?

Which has a better warranty?

Does NuWatt install both the Enphase IQ Battery 5P 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 5P vs FranklinWH aPower 2

Choose Enphase IQ Battery 5P if:

Choose FranklinWH aPower 2 if:

Spec-by-Spec Comparison

Pros & Cons

Enphase IQ Battery 5P

Pros

Cons

FranklinWH aPower 2

Pros

Cons

Installation Notes from Our Crew

Enphase IQ Battery 5P

FranklinWH aPower 2

Frequently Asked Questions

Related Comparisons

Not Sure Which to Choose?

Ready to start your clean energy project?

Enphase IQ Battery 5P vs FranklinWH aPower 2

Choose Enphase IQ Battery 5P if:

Choose FranklinWH aPower 2 if:

Spec-by-Spec Comparison

Pros & Cons

Enphase IQ Battery 5P

Pros

Cons

FranklinWH aPower 2

Pros

Cons

Installation Notes from Our Crew

Enphase IQ Battery 5P

FranklinWH aPower 2

Frequently Asked Questions

Related Comparisons

Not Sure Which to Choose?