Backup power is not one product. It is a load plan, a safe connection, an energy or fuel strategy, a permitted installation and a maintenance commitment. Compare portable, standby, battery and hybrid paths without pretending one fits every home.
CPSC says to operate portable generators outside only, at least 20 feet from the home, with exhaust directed away. Never use one in a home, garage, basement, crawlspace, shed, porch or carport—even with doors open. Install working CO alarms on every level and outside sleeping areas.
CPSC guidance ↗Start with outage behavior and site constraints. Product comparisons only become meaningful after the required power, energy, connection and recovery plan are known.
Lower-complexity entry when safe outdoor placement, fuel and manual setup are realistic.
Can start automatically and serve selected circuits or a managed larger load when properly designed.
No combustion exhaust at the battery and fast transfer; solar may provide a recharge path when designed for outage operation.
Battery can handle quiet/instant loads while a generator or solar source supports recharge and extended operation.
Copy running watts, starting watts and expected daily hours from the equipment label or manufacturer documentation. Do not guess medical-device requirements.
Planning boundary: This worksheet does not select equipment or validate wiring. Starting behavior, voltage, power quality, climate, derating, load sequencing and manufacturer rules can change the required system. Have a qualified professional verify the final design.
Enter written quote amounts. Blank means unknown—not included.
Ask every bidder the same questions and require the answers in the revised written proposal.
Which exact circuits and loads are included, and which are excluded or shed automatically?
What running, starting and daily-energy assumptions produced the recommended size?
Are the transfer equipment, panel work, conductors, trenching and commissioning included?
Who verifies gas-meter capacity, propane storage or the portable-fuel plan?
Which permits, inspections, utility approvals and code upgrades are included?
Where can the equipment legally and safely sit given exhaust, openings, property lines, flood, snow, noise and service access?
What maintenance, exercise testing, monitoring fees, consumables and replacement batteries are expected?
What happens during a failed start, depleted battery, low fuel supply or equipment fault?
Safe placement, CO alarms, correctly rated cords or approved transfer equipment, dry operation, fuel rotation and practiced startup matter as much as nameplate watts.
Open the portable-generator safety plan →Electrical service, transfer equipment, fuel supply, setbacks, pad/drainage, noise, flood exposure and maintenance belong in one installed scope.
Start the local permit check →HomeCostGrid does not sell, install or certify backup-power equipment. The calculator uses only your entries and cannot verify product compatibility, electrical design, fuel availability, runtime, code compliance or safe siting.
These pages pick up where this one leaves off, so you can answer the next question without starting over.
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