Post Top: Solar Central – 100 Watt / 70 Ah

Part Number: M75-SPTOP-000C

MUTCD Sign Rings: If your controller is running firmware 401N or >, adjust brightness from 100% to 60%. Failure to do so will result in higher power draw and solar systems may fail.

Is my ring MUTCD?
There is a -M at the end of the model number for MUTCD compliant rings

Summary

The Post Top Solar Kit provides a complete off-grid power solution for TraffiCalm radar speed signs using a 100-watt solar panel and dual-battery 70 Ah storage system. Designed for clean pole-top integration, this system maximizes solar exposure while maintaining a compact footprint. With weather-sealed electronics, heavy-duty mounting components, and conduit-protected wiring, the system delivers reliable performance across year-round field deployments.

Product Options

This solar kit is available under a single configuration: M75-SPTOP-000C. Battery quantity, mounting hardware, and included components are fixed as listed in the specifications.

Specifications

Physical Descriptions

• Universal mounting bracket accommodates 4.5" OD round posts
• NEMA 3R enclosure
• All electronics potted for weatherproofness
• Stainless steel fasteners for corrosion resistance
• Solar panel dimensions: 51.18" L × 20.79" W × 1.38" D (130 cm × 52.81 cm × 3.51 cm)
• Battery box dimensions: 12" H × 12" W × 10" D (30.48 cm × 30.48 cm × 25.4 cm)
• Total system weight: 102 lb (46.27 kg), including two 35 Ah batteries, battery box, solar panel, and rack

Solar Panel Power Specs

• Maximum Power (Pmax): 100 W
• Voltage at Pmax (Vmp): 17.2 V
• Current at Pmax (Imp): 4.94 A
• Open Circuit Voltage (Voc): 21.6 V
• Short-Circuit Current (Isc): 5.5 A
• Temperature coefficient of Voc: −(80 ± 10) mV/°C
• Temperature coefficient of Isc: (0.065 ± 0.015)%/°C
• Temperature coefficient of power: −(0.5 ± 0.05)%/°C
• NOCT: 47 ± 2 °C
• Maximum system voltage: 60 VDC, 1500 watts
• Operating temperature: −40°F to +185°F (−40°C to +85°C)

Battery Specs

• Quantity 2 AGM batteries (35 Ah each)
• 12 V AGM, valve-regulated, spill-proof, high-energy density
• Nominal capacity (20-hr, 1.75 A to 10.50 V): 35 Ah each
• Internal resistance: 8 milliohms
• Max discharge current (7 min): 105 A
• Battery dimensions: 7.72" L × 5.14" W × 6.22" H (19.61 cm × 13.06 cm × 15.8 cm)
• Approx battery weight: 24.7 lb each
• Operating temperature:
  • Charge: −4°F to 122°F (−20°C to 50°C)
  • Discharge: −40°F to 140°F (−40°C to 60°C)

Construction

• 14-gauge carbon steel NEMA 3R battery housing
• Standard gray polyester powder-coat finish
• Provisions for padlocking, replacement keys available
• Spun aluminum + powder-coated cast steel structure
• Stainless and zinc-plated hardware

Bracket

• Wind load rating: 90 MPH (145 KPH)
• Snow load rating: 1.1 kN/m²
• Designed for post-top installation
• Allows optimal solar placement at latitude + 15° tilt

Environmental

• Operating temperature range: −40°F to +185°F (−40°C to +85°C)

Warranty

• 3-year limited warranty on the solar kit
• 1-year warranty on batteries
• Unlimited technical support included

Why Choose the Post Top Solar Kit – 100 W / 70 Ah?

• Higher-capacity 100 W panel supports stronger charging
• Dual 35 Ah batteries offer extended runtime
• Clean pole-top mounting avoids side obstructions
• Durable NEMA 3R housing and potted electronics ensure long-term reliability
• Battery enclosure supports keyed access and service convenience
• Build America / Buy America Compliant
• Made in an ISO 9001:2015 certified facility