- PV INTERCONNECTION
Solar Meter Socket Adapter

- 2-8 HoursAVG TIME SAVINGS
- $4,550POTENTIAL COST SAVINGS

Safer, Quicker, Cost-Effective Alternative To Line-Side Taps & MPUs
All-in-one supply-side connection at the meter. Less work, fewer headaches, faster completion.
| Solar MSA | Line-Side Tap | Service/MPU | |
|---|---|---|---|
| Single-Line Diagrams | Simple, Repeatable | Complex, Custom | Complex, Custom |
| Interconnection | Easy | Labor Intensive | Labor Intensive |
| Install Time | 15-30 Minutes | 3-6 Hours | 1-3 Days |
| Inside Home Access | Minimal | Extensive | Extensive |
| Panel Work | None-Minimal | Substantial | Substantial |
| Home Repairs | None | Walls & Painting | Walls & Painting |
| Overcurrent Protection (Circuit Breaker) | Built-In, Up To 80A / 22k AIC | Installed Separately | Installed Separately |
| Safety Risk | Low | Moderate | Moderate |
| Inspection | Predictable | Less Predictable | Less Predictable |

ConnectDER's Flagship Product For The Last Decade
Tried, tested, trusted by installers nationwide.

Ondřej Mahdal | Design Manager - Freedom PowerConnectDER’s devices are easy to install and even easier to design with. Their Solar MSA helps especially with PV systems that are too large to interconnect with backfeed breakers and projects where standard line-side taps are not allowed or possible.

Cameron Maurer | Master Electrician - Green Mountain SolarYou never know what you're going to find. A really old panel, it could be rusty, the wire size could be wrong. Using a ConnectDER MSA removes these variables, streamlines the entire process, and makes it more efficient and safe.



“Eliminates the need to enter a home and greatly reduces the amount of electrical work required.”

“ConnectDER's Meter Socket Adapter is an installer's dream.”

“Costs 10% or less than upgrading a home’s service panel or utility interconnection.”
How To Install
Fool-proof installation behind the meter in just 15-30 minutes.
- Step 1

Remove the utility meter
- Step 2

Install the ConnectDER MSA
(NO SPECIAL TOOLS REQUIRED) - Step 3

Reattach the utility meter
Product shown is the ConnectDER Solar Meter Socket Adapter. All our MSAs follow the same simple 3-step install process. In some areas, only utility technicians can install MSAs behind the utility billing meter.
Approved In More Than 60% Of The U.S. Residential Market
We have relationships with all major utilities across the U.S. and we’re constantly securing new approvals for behind-the-meter installation of our devices.
- BEHIND THE UTILITY METER (APPROVED BY UTILITY)

Solar MSA Tech Specs
Mechanical Specifications
| Enclosure Rating | NEMA 3R |
|---|---|
| Enclosure Type | Injection molded polycarbonate, UL 94 V0 flame rating |
| Cooling | Natural convection |
| Dimensions (W x H x D) | 6.7 x 6.7 x 4.6in adapter only |
| Weight | 4.1 lb (1.9kg) |
| Mounting System | Blade interface with 4-jaw or 5-jaw meter socket |
| Electric Meter Compatibility | Type 2S, 12S |
| Meter Socket Compatibility | Ringless and ring-type, lever and horn bypass meter sockets |
| DER Interface Point | Factory configured, load side of utility meter/supply side of main service disconnect |
| Conduit Connection | Single 1” NPT fitting |
| Terminal Connections | L1, L2, N, G; Up to 3 AWG wire |
Utility Interactive Source Ratings
| Maximum Power | 15.36 KW AC |
|---|---|
| Maximum Voltage | 240V |
| Maximum Continuous PV Current | 64A |
| Continuous Combined Current, PV/Grid | 200A |
| Inverter Wiring Termination | Terminal block |
| Grid Termination Method | Blade interface with meter socket for L1/L2, pigtail for neutral |
Safety Information
| Applicable Safety Standards | UL 414 – Meter Sockets |
|---|---|
| File Number (Standards) | 5028888 |
| Ambient Air Operating Temperature Range | -22°F to 149°F (-30°C to 65° C) |
| Ambient Air Storage Temperature Range | -40°F to 176°F (-40°C to 80°C) |
Overcurrent Protection
| Type | Siemens Type QP, Siemens Type QH, Eaton Type BRH (22k AIC) Thermal magnetic 120/240V, externally resettable |
|---|---|
| Overcurrent Ratings Available | 40A, 60A or 80A Standard |
| Overcurrent Interrupting Rating | 22k AIC |

Simpler Schematics, Happier Designers
A repeatable, scalable interconnection method you can use on every job.
Solar MSA Frequently Asked Questions
Solar MSA supports up to 200A, single phase electrical services. It is compatible with ring type or ringless meter sockets and both ANSI Form 2S (120/240V) and 12S (120/208V) electronic (i.e. AMI) and older style electromechanical meters.
Conveniently Sold Where You Already Shop
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