Energy Revolution System vs David’s Shield

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Both guides are about coping without mains power, but they answer different questions. One is about planning a small backup-power set-up; the other is about long grid-down events and protecting small electronics. Here’s how they compare.

Quick verdict

Best if: Planning for power cuts

Energy Revolution System

Backup-power planning.

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Best if: Long grid-down planning

David’s Shield

Broader outage planning.

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Side by side

	Energy Revolution System	David’s Shield
Question it answers	How do I keep some power on in a cut?	How do I plan for a long grid-down event?
Main content	Planning a small home backup-power set-up	Faraday-cage shielding idea and outage planning
Realism	Treat savings or output figures as vendor claims	Large EMP events are rare; planning advice is the useful part
Safety	Anything wired to your home needs a qualified electrician	Test any home-made shielding

The short answer

For most households, ordinary power cuts are the realistic risk, so a backup-power guide is the more practical first buy. If you want a broader grid-down plan, David’s Shield focuses on that.

Energy Revolution System

One of the best-selling products on the ClickBank marketplace. Treat any savings claims as the vendor’s. Batteries and generators carry fire, shock and carbon-monoxide risks: never run a generator indoors, and use a qualified electrician.

David’s Shield

Covers shielding small electronics and planning for long outages. The sales page leans on dramatic scenarios; the practical planning sections are the most useful part.

Official advice first

For free official preparedness advice, see gov.uk/prepare in the UK or ready.gov in the US.

Safety first: generators, batteries, fuel and home-built power systems can cause fires, electric shock and carbon-monoxide poisoning. Never run a generator or fuel heater indoors, fit a CO alarm, and use a qualified electrician for anything connected to your home wiring. Drinking water must be properly treated: follow official guidance (in the UK, your water company and gov.uk; in the US, ready.gov and the CDC). For official emergency-preparedness advice, see gov.uk/prepare or ready.gov.

Common questions

Will either cut my energy bills?

Treat any savings claims as the vendor’s, not ours. Results depend on your home and set-up.

Still not sure?

Answer 2–3 quick questions and we’ll suggest the best fit.

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Prices, contents and refund terms are set by each vendor and can change. Check the official page at checkout.