Will Your System Last the Night?

Interactive Boat Power Planner — Solar • Battery • Generator • AC

Replaces messy spreadsheets and guesswork

Basic Advanced

Will Your Boat Power System Last the Night?

Boat Power Planner by SV Hanna Belle

Build your system and see if it actually lasts through the night. Test real tradeoffs between solar, battery capacity, generator runtime, and AC usage in seconds.

Quick Presets
Choose a preset → Toggle your loads → Check if you make it through the night
System Setup
📍 Location
☀ Solar Array
2400 W
▭ Battery Bank
800 Ah
⚙ Gen Mode
▼ Generator Settings
⚡ Generator
🕒 Gen Runtime (Manual Only)
3.6 hrs
📉 Start %
40%
📈 Stop %
85%
🔌 System Voltage
🖨 Inverter / Charger
Power Loads
✓ Base Loads
Includes fridge, electronics, pumps, lighting, and always-on systems (~400W average, 9.6 kWh/day)
ON
✓ Heavy Loads
Includes intermittent high-draw appliances like microwave, kettle, induction cooking, or power tools. Selected intermittent loads use about 4.0 kWh/day. Equivalent continuous load: 4000 W average over 24 hours.
OFF
✓ Optional Loads
Situational or infrequent loads like windlass, kettle, or hair dryer. Selected optional loads use about 0.0 kWh/day. Equivalent continuous load: 0 W average over 24 hours.
OFF
~1500W × 0 hrs = 0.0 kWh/day
✓ Air Conditioning
ON
▼ Air Conditioning Settings
🌬 AC Unit Size
🌙 AC Start
16:00
🌅 AC End
2:00
❄ Air Conditioning
~1500W × 8 hrs = 12.0 kWh/day
8 hrs
🔋 Start Battery
50%
System Summary

Your system is balanced for moderate daily usage.

Battery Curve
Days start and end at 0600.
How to Fix It
☀ + Add 1200W Solar
System Sustainable
▭ + Add 300 Ah Battery
Still Fails
⚡ Run Generator 2.5 hrs/day
System Stable
System Status
SYSTEM FAILS
Battery Dead by 12:17 AM
⚡ Battery End:
5%
⛽ Generator Stats
0 cycles | 0.0 hrs | 0.0 gal
☀ Solar vs. Usage
12 kWh / 18 kWh
⚡ Generator Output
0 kWh
🔌 Battery Amps
0 A
About This Tool

This tool shows whether your boat’s power system will survive real overnight conditions — and what actually fixes it if it won’t. It’s intentionally simplified to highlight the tradeoffs that matter: solar vs. generator, battery capacity, and AC usage. Use it to test scenarios, push your system to failure, and find the smallest setup that works.

Based on real offshore usage patterns and system behavior.

Watch real-world builds and walkthroughs on YouTube


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