EMP Shield DC 90-120 Volt Solar & Wind System EMP Protection

EMP Shield DC 90-120 Volt EMP Protection Guards Solar and Wind Controllers and Inverters That Work in the 90-120V Range

The DC-90-120-W is EMP Shield's single DC unit for solar and wind equipment that runs between 90 and 120 volts. EMP Shield lists it for inverters or charge controllers with an operational range of 90-120 volts. Its label reads Model DC/90-120V/W, with +POS on the red lead, -NEG on the black lead and GND on the green lead.

Choose it when the first device after your PV array falls in this voltage range. EMP Shield builds its DC series for standalone solar systems, off-grid cabins and mobile power setups, and for sites such as remote monitoring stations and critical infrastructure. This model fills the 90-120V slot in that lineup, between the 48V and 220-300V models.

EMP Shield DC 90-120 Volt EMP Protection Features

Sized for the 90-120V Input Range

EMP Shield offers DC units at eight voltage points, from 12V to 1000V. This one is matched to controllers and inverters that work between 90 and 120 volts, so the protection is set for that part of your system.

Connects Across the PV Input

EMP Shield's single solar system diagram shows the DC unit wired across the charge controller's PV input, between the panels and the controller. Red goes to positive, black to negative and green to ground. That placement puts the protection right where the array's wiring enters your equipment.

Three-Way DC Protection

The protection modes EMP Shield lists for its DC units are positive-to-negative, positive-to-ground and negative-to-ground. That covers positive, negative and ground in every pairing.

228kA Surge Capacity per Phase

EMP Shield states a surge capacity of 228kA per phase for the DC series, which it also expresses as up to 228,000 amps per phase. The nominal discharge current (In) is 114kA per circuit.

Under-One-Nanosecond Shunting and EMP Coverage

EMP Shield says its SightSpeed technology detects over-voltage and starts shunting it in under a nanosecond. It lists coverage for the E1, E2 and E3 phases of an EMP, CMEs or solar flares, lightning and power surges. MIL-STD-188-125-1, MIL-STD-461G, MIL-STD-464C and RS-105 are the standards EMP Shield reports testing against at Keystone Compliance, at 50 kV/m and 90 kV/m. Keystone Compliance, EMP Shield points out, does not endorse products. EMP Shield states that its products carry a Department of Homeland Security listing in the agency's EMP resilience report.

IP66 Enclosure for Outdoor Sites

EMP Shield gives this model an IP66 rating and says it can be used outdoors in extreme weather. The gray box mounts with four corner tabs, and its leads exit through a single fitting.

Real-World Applications

Off-grid solar arrays. On an off-grid system, EMP Shield points to the charge controller as the device that sets your choice. If that controller works in the 90-120V range, this unit goes across its PV input.

Wind energy systems. EMP Shield groups wind with solar in its list of DC uses. A wind system whose controller or inverter works between 90 and 120 volts is a match.

Grid-tied inverters. In a grid-tied setup, the inverter is usually the first device after the array, according to EMP Shield. When its operating range sits at 90-120V, this model fits there.

Remote and critical sites. EMP Shield names remote monitoring stations and critical infrastructure for its DC series. Solar-powered equipment at those sites with a 90-120V controller or inverter can use this unit.

Practical Comparison

Single DC 90-120V Versus Dual DC 90-120V

EMP Shield also makes a Dual 90-120V unit that combines two DC models in one device to save space. Pick this single unit for one 90-120V circuit. The Dual version makes sense when two circuits at that voltage need coverage from one box.

DC 90-120V Unit Versus a Faraday Bag

A Faraday bag keeps stored electronics shielded while they are packed away. Solar equipment has to be wired and running to produce power. The DC-90-120-W protects the system while it works.

DC 90-120V Unit Versus a Plug-In Surge Strip

Plug-in surge strips sit on AC outlets inside a building. They do nothing for the DC conductors running from an array to a charge controller. This unit is built for that DC run.

Buyer Guidance

Reading Your Equipment's Input Voltage

EMP Shield's rule is simple. Select the unit by the maximum input voltage of the first device after the PV array. Look up that figure for your charge controller or inverter before you order. If it lands in the 90-120V range, this is your model. If it lands outside that range, the Outbound Power team can help you find the right voltage point.

Who Should Install It

This unit connects to your solar wiring. EMP Shield's protection policy names installation by a licensed electrician as one of its conditions, so hire one for the job.

This May Be A Good Fit If

• Your charge controller or inverter works at 90-120V
• You run an off-grid solar or wind system
• You have one DC input circuit to protect
• You need a unit EMP Shield rates for outdoor use

Common Questions

Which Device Sets the Voltage I Choose?

The first device after the PV array. EMP Shield says that is usually the charge controller in off-grid systems and the inverter in grid-tied systems.

What If My Input Voltage Is Above 120V?

Then a different model is needed. EMP Shield's next voltage point above this one is 220-300V. Ask our team before ordering if your equipment falls between the listed ranges.

What Warranty Does EMP Shield Provide?

A 10-year limited warranty from EMP Shield covers defects in materials and workmanship through repair or replacement. Lightning damage that destroys the unit is handled with a $50 replacement once the destroyed unit is sent in. EMP Shield's separate protection policy may reimburse connected electronics up to $25,000 when its terms are met.

What's Included

• 1 x EMP Shield DC-90-120-W Unit

Protection Matched to Your 90-120V Equipment

EMP Shield DC 90-120 Volt EMP Protection puts a rated surge path on the DC input of your 90-120V charge controller or inverter, in an enclosure EMP Shield rates for outdoor use. Questions about your system's voltage or the install are welcome, and the Outbound Power team is glad to help.

EMP Shield DC-90-120-W Manual