How does the Solar Microinverter vs String Inverter & Optimizer Calculator calculate financial return and payback?

The solver models gross capital expenditure (CapEx), Section 48 Investment Tax Credits (ITC 30%–50%), 5-year MACRS accelerated depreciation, utility demand charge shaving, and levelized cost of energy (LCOE).

Does this calculator account for battery degradation over time?

Yes, it models standardized degradation curves (typically 1.5% to 2.2% annually for LiFePO4 cells) and accounts for battery pack augmentation cycles across a 20-to-25 year lifecycle.

What federal tax credits apply under the Inflation Reduction Act?

Under Section 48 and Section 45Y, qualifying clean energy and battery storage installations unlock a 30% base ITC, plus potential 10% domestic content and 10% energy community bonus adders.

Inverter Architecture & Power Electronics

Microinverter vs String Optimizer Sizer

Compare Enphase IQ8 microinverters, SolarEdge HD-Wave with DC optimizers, and standard string inverters. Calculate 25-year production and replacement economics.

Array Sizing & Roof Conditions

Total Solar DC System Capacity (kW)

kW DC (24 x 400W panels)

Roof Shading Conditions

Grid Electricity Rate ($/kWh)

Inverter Architecture Comparison

Enphase IQ8 $4,800 25-Yr warranty included

SolarEdge + Opt $3,840 Inverter + optimizers

Raw String $2,400 Replaced at Yr 12

Micro Shading Gain +11% vs centralized string

25-Yr Extra Value +$8,400 Power harvested

Top Choice MICROINVERTER Max shade yield

Adding AC-Coupled or DC-Coupled Battery?

Enphase IQ batteries pair seamlessly via AC-coupling without needing high-voltage DC switches.

Battery Hub

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