Long Island storms make backup power a real consideration. The two main options — a standby generator or a home battery — solve the problem differently. Here's how to choose.
Standby generators
A natural-gas or propane standby generator with an automatic transfer switch can run essential circuits or a whole home indefinitely as long as fuel is available. Best for long, frequent outages.
Home batteries
Batteries like the Tesla Powerwall store energy (often paired with solar) and switch over silently in milliseconds. Best for shorter outages, daily peak-shaving, and homeowners going solar.
Cost Estimates
| Standby generator, 10–14 kW essentials (installed) | $6,500 – $9,500 |
| Standby generator, 22 kW whole-home (installed) | $10,500 – $14,500 |
| Standby generator, 24–26 kW (installed) | $12,500 – $16,500 |
| Single home battery (installed) | $12,000 – $18,000 |
| Interlock + inlet + permit (portable generator) | $1,000 – $2,000 |
| Manual transfer switch for portable generator | Free quote (per project) |
Permit Information
- Both generators and batteries require electrical permits and inspection; generators also require gas and sometimes mechanical permits.
Common Mistakes to Avoid
- Backfeeding a portable generator through a dryer outlet — extremely dangerous and illegal.
- Undersizing the battery or generator for the loads you actually want backed up.
When to Call a Professional
Transfer switches and standby systems must be installed by a licensed electrician. Never connect any generator without a proper transfer switch.
Frequently Asked Questions
Is a generator or battery better for Long Island?
Generators win for long, frequent outages; batteries win for short outages, quiet operation, and pairing with solar. Many homeowners eventually do both.
Talk to a licensed Long Island electrician
Flexible financing available
Spread the cost of panel upgrades, EV chargers, and backup power over time. Ask about financing options when you request your estimate.
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