Power Planner

Off-Grid Energy Sizing & Critical Load Analysis

OPERATIONAL SCENARIO
TARGET AUTONOMY:720h (30.0d)
Presets:
GROUP COMPOSITIONGeneral Household Profile
SYNCED WITH HOUSEHOLD PROFILE(1 person)

Using your global household composition. Calculated targets automatically adjust based on each member's demographic profile and pet calorie/water baselines.

Adults:1
Children:0
Important Considerations
Inverter Surge Capability:

Ensure your inverter can handle the Peak Surge for at least 5-10 seconds. Induction motors (Fridges Pumps Power Tools AC Units) require 3-5x their running watts to start.

Note: Induction equipment (motors, pumps, compressors) can surge 3x-7x their rated power.

Battery Discharge Rate (C-Rating):

Verify your battery bank can deliver the required Instant Watts without voltage drop.

• Pure Sine: Highly recommended for electronics and inductive motors.

• Efficiency: Higher voltage (24V/48V) = Lower amperage and higher thermal efficiency.

Equipment List

Device Name
= 1188 Wh/day⚡ Surge: 1200W

System Configuration

1 = Daily Recharge (every day)

Power Results

Total Running Load
150.0 Watts
INVERTER SURGE SCENARIOS:
Best Case (Single max surge)1200.0 W
Standard1200.0 W
Worst Case (Concurrent startup)1200.0 W
DAILY ENERGY BALANCE
Daily Consumption:1397.6 Wh/day
ℹ️ No recharge configured: the battery bank is sized to cover 100% of consumption during a complete blackout.
Required Battery Bank
6988.2 Ah @ 12V
~41929 usable Wh (83859 nominal Wh at 50% DoD)
Inverter Selection: Pure Sine Wave inverters are strongly recommended. Select an inverter with the AC output voltage corresponding to your country/region (e.g. 230V 50Hz in Europe/Africa/Asia or 120V 60Hz in North America).
Recommended Charging Wattage Range
8386W – 16772W
Recommended charge rate for 50% (Lead Acid / AGM) (0.10C – 0.20C):
C-Rate Validations
Max Charge Rate:
0.00CSafe
Cont. Discharge:
0.00C(14.7A)Safe
Surge Capacity:
0.02C(117.6A)Safe
SYSTEM WARNINGS
❌
System in Deficit: You are losing 1398Wh daily. With your current battery size, the system will reach 0% in approximately 30.0 days. Increase charging power to avoid shutdown.
⚠️
Reality Check: Your battery bank is oversized for this load. Check if Autonomy Days is set too high (keep it at 1-2 days) or if appliance Duty Cycles are correctly set.

Energy Survival Guide for a Blackout

Preparing for power failures requires more than just buying equipment. A well-designed Hybrid System ensures long-term resilience. Use our planner above to calculate the necessary capacity, whether you are assembling your own DIY Batteries with LiFePO4 cells or planning the integration of an LPG Generator for emergency recharging.

Check out our advanced tutorials to learn how to build a 48V battery bank or construct a DIY sound isolation box for generators.

Frequently Asked Questions (FAQ)

Commercial Batteries vs. DIY Systems: Which is the best option for my home?
The choice depends on your budget. Commercial systems (EcoFlow, BLUETTI, Jackery) offer ease of use, fast charging, or portability. DIY systems (See our Tutorial) (48V/51.2V LiFePO4 rack batteries) offer the lowest cost per kWh and are ideal for robust off-grid setups.
What is the best fuel for a generator in an emergency scenario?
LPG (Propane/Butane) is ideal for urban environments due to cleaner emissions. Diesel offers high density for heavy loads. Natural gas depends on the public grid. (Note: Independently verify the storage shelf life of each fuel).
Can I use the generator in a well-ventilated, closed room with no connection to the rest of the house?
Yes, in an isolated, attached room that is well-ventilated for the exhaust of toxic gases. The goal is to run it only to recharge the batteries. Building a DIY sound isolation box is recommended due to noise levels above 70dB.
How do I size the battery and know what equipment I can keep running?
By evaluating capacity (kWh) and power (kW). Use our Battery Sizing Calculator at the top of this page to input critical equipment and find your exact configuration.