🌱 Renewable Energy Calculator - Solar Panel Sizing, Wind Energy & Battery Storage

☀️ Solar Panel System Calculator

📊 System Type:

Grid-Tied Off-Grid Hybrid (Grid-Tied + Battery) Ground Mount Rooftop Commercial Scale

🏠 Energy Consumption

⚡ Monthly Electricity Usage (kWh):
💰 Average Electricity Rate ($/kWh):
📊 Energy Independence Goal (%):	50% - Partial Offset 75% - Significant Offset 100% - Full Independence 125% - Net Positive
📈 Annual Usage Growth (%):	%

🌞 Solar Resource Assessment

📍 Location (Solar Zone):	Excellent (Southwest US) Very Good (California, Nevada) Good (Most of US) Moderate (Northeast, Northwest) Poor (Alaska, Northern regions)
☀️ Peak Sun Hours (daily):
📊 Roof Orientation:	South (Optimal) Southwest Southeast West East North (Poor)
📐 Roof Tilt Angle (degrees):
🌳 Shading Factor:	No Shading Minimal (5% loss) Moderate (15% loss) Significant (30% loss) Heavy Shading (50% loss)

🔧 System Components

📊 Panel Type:	Monocrystalline (20-22%) Polycrystalline (15-17%) Thin Film (10-12%) Bifacial (22-24%) PERC (20-21%)
⚡ Panel Wattage:	W
📊 Panel Efficiency (%):	%
🔄 Inverter Type:	String Inverter (95%) Power Optimizers (97%) Microinverters (96%) Central Inverter (98%)
📊 System Efficiency (%):	%

💰 System Costs

💰 Cost per Watt Installed:
🏠 Available Roof Area (sq ft):
💰 Federal Tax Credit (%):	%
💰 State/Local Incentives:
💰 Net Metering Rate ($/kWh):

☀️ Solar Panel System Sizing Guide

Home Size	Monthly Usage	System Size	Panel Count	Roof Area Needed
Small (1,000-1,500 sq ft)	500-750 kWh	4-6 kW	10-15 panels	200-300 sq ft
Medium (1,500-2,500 sq ft)	750-1,200 kWh	6-10 kW	15-25 panels	300-500 sq ft
Large (2,500-4,000 sq ft)	1,200-2,000 kWh	10-16 kW	25-40 panels	500-800 sq ft
Very Large (4,000+ sq ft)	2,000+ kWh	16+ kW	40+ panels	800+ sq ft

📊 Solar Panel Technology Comparison

Panel Type	Efficiency	Cost/Watt	Lifespan	Best Use Case
Monocrystalline	20-22%	$0.70-$1.00	25-30 years	Limited roof space
Polycrystalline	15-17%	$0.50-$0.70	25-30 years	Budget-conscious
Thin Film	10-12%	$0.40-$0.60	20-25 years	Large installations
Bifacial	22-24%	$0.80-$1.20	25-30 years	Ground mount systems
PERC	20-21%	$0.60-$0.80	25-30 years	Balanced performance

🌞 Solar System Presets

🏠 Small Residential 🏡 Large Residential 🏢 Small Commercial

🏕️ Off-Grid Cabin 🚐 RV Solar 🚜 Farm Solar

💨 Wind Energy System Calculator

📊 Wind System Type:

Small Residential (1-10 kW) Medium Residential (10-100 kW) Commercial (100kW-1MW) Utility Scale (1MW+) Vertical Axis Turbine Horizontal Axis Turbine

💨 Wind Resource Assessment

💨 Average Wind Speed (mph):
📊 Wind Class:	Class 1 (Poor: 0-9.8 mph) Class 2 (Marginal: 9.8-11.5 mph) Class 3 (Fair: 11.5-12.8 mph) Class 4 (Good: 12.8-14.3 mph) Class 5 (Excellent: 14.3-15.7 mph) Class 6 (Outstanding: 15.7+ mph)
📏 Hub Height (feet):
🌊 Turbulence Factor:	Low (Open plains) Moderate (Rural areas) High (Suburban) Very High (Urban)
🏔️ Terrain Factor:	Flat/Open Rolling Hills Mountainous Coastal Ridge Top

🔧 Turbine Specifications

⚡ Turbine Rated Power (kW):
💨 Cut-in Wind Speed (mph):
💨 Rated Wind Speed (mph):
💨 Cut-out Wind Speed (mph):
📊 Capacity Factor (%):	%

💰 Wind System Costs

💰 Turbine Cost per kW:
🏗️ Installation Cost:
🔧 Annual Maintenance (% of cost):	%
📋 Permits & Interconnection:

💨 Wind Energy Potential by Region

Region	Wind Class	Avg Speed (mph)	Capacity Factor	Suitability
Great Plains	4-6	14-18	35-45%	Excellent
Midwest	3-5	12-16	30-40%	Very Good
Coastal Areas	3-4	12-14	25-35%	Good
Mountain Ridges	4-5	13-16	30-40%	Very Good
Southeast	1-3	8-12	15-25%	Poor to Fair
Northeast	2-4	10-14	20-30%	Fair to Good

🔧 Wind Turbine Size Comparison

Turbine Size	Power Rating	Rotor Diameter	Hub Height	Annual Output
Small Residential	1-10 kW	8-25 ft	30-80 ft	2,000-20,000 kWh
Medium Residential	10-100 kW	25-50 ft	80-120 ft	20,000-200,000 kWh
Commercial	100kW-1MW	50-150 ft	120-250 ft	200,000-2,000,000 kWh
Utility Scale	1-3 MW	200-400 ft	250-350 ft	2-6 million kWh

🔋 Battery Storage System Calculator

📊 Battery Application:

Backup Power Load Shifting Off-Grid Storage Grid Services Solar + Storage Wind + Storage

🔋 Battery System Sizing

⚡ Daily Energy Consumption (kWh):
📊 Backup Duration (hours):	4 Hours 8 Hours 12 Hours 24 Hours (1 Day) 48 Hours (2 Days) 72 Hours (3 Days)
⚡ Peak Power Demand (kW):
📊 Depth of Discharge (%):	50% (Lead Acid) 80% (AGM) 90% (Lithium) 95% (LiFePO4)
📊 System Efficiency (%):	%

🔋 Battery Technology

📊 Battery Chemistry:	Lithium-Ion LiFePO4 Lead Acid AGM Gel Saltwater
🔄 Cycle Life:
📊 Round-Trip Efficiency (%):	%
📊 Self-Discharge Rate (%/month):	%
🌡️ Temperature Derating (%):	%

💰 Battery System Costs

💰 Battery Cost per kWh:
🔄 Inverter Cost:
🏗️ Installation & BOS:
🔧 Annual Maintenance:
🔄 Replacement Cost (% of initial):	%

🔋 Battery Technology Comparison

Battery Type	Cost/kWh	Cycle Life	Efficiency	Lifespan	Best Use
Lithium-Ion	$600-1,000	5,000-8,000	95-98%	10-15 years	Daily cycling
LiFePO4	$700-1,200	6,000-10,000	95-98%	15-20 years	Long-term storage
Lead Acid	$200-400	500-1,500	80-85%	3-8 years	Budget backup
AGM	$300-600	800-2,000	85-90%	5-10 years	Maintenance-free
Saltwater	$500-800	5,000+	85-90%	10-15 years	Safe, non-toxic

📊 Battery Sizing Guidelines

Application	Typical Size	Backup Duration	DOD	Cost Range
Essential Loads Backup	10-20 kWh	8-12 hours	80-90%	$8,000-20,000
Whole Home Backup	20-40 kWh	12-24 hours	80-90%	$20,000-40,000
Off-Grid Cabin	15-30 kWh	2-3 days	50-80%	$15,000-30,000
Solar + Storage	10-30 kWh	Evening use	90-95%	$10,000-30,000
Commercial Backup	50-200 kWh	4-8 hours	80-90%	$50,000-200,000