Post Top: Solar South – 60 Watt / 35 Ah

Part Number: M75-SPTOP-000S

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 60-watt solar panel and a 35 Ah AGM battery system. Designed for top-of-pole mounting, this kit delivers year-round energy production through efficient solar harvesting and a weather-resilient construction. With an integrated controller, heavy-duty mounting hardware, and conduit-enclosed wiring, the system installs cleanly and supports reliable roadside performance in a variety of climates.

Product Options

This solar kit is available under a single configuration: M75-SPTOP-000S.

Kit contents are fixed as described in the specifications.

Specifications

Physical Descriptions

• Universal mounting bracket accommodates 4.5" OD round posts
• NEMA 3R weatherproof enclosure
• All electronics potted for weatherproofness
• Stainless steel fasteners for corrosion resistance
• Solar panel dimensions: 22.83" L × 22.24" W × 1.38" D (58 cm × 56.5 cm × 3.5 cm)
• Battery box dimensions: 12" H × 12" W × 10" D (30.48 cm × 30.48 cm × 25.4 cm)
• Total system weight: 69 lb (31.3 kg), including one 35 Ah battery, battery box, solar panel, and panel rack

Solar Panel Power Specs

• Maximum Power (Pmax): 60 W
• Voltage at Pmax (Vmp): 19.08 V
• Current at Pmax (Imp): 3.16 A
• Open Circuit Voltage (Voc): 22.35 V
• Short-Circuit Current (Isc): 3.36 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 1 AGM battery (35 Ah)
• 12 V AGM, valve-regulated, spill-proof, high-energy density
• Nominal capacity (20-hr, 1.75 A to 10.50 V): 35 Ah
• Internal resistance: 8 milliohms
• Maximum 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)
• Approximate battery weight: 24.7 lb
• 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
• Provisions for padlocking; replacement keys available
• Standard gray polyester powder-coat finish
• Spun aluminum and 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
• Supports top-of-pole mounting
• Bracket and mount assembly designed for optimal solar orientation (latitude + 15° recommended)

Environmental

• Operating temperature range (system): −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 – 60 W / 35 Ah?

• Optimized post-top mounting maximizes solar exposure and system efficiency
• Complete kit includes panel, controller, enclosure, wiring, and brackets
• Lightweight and compact design ideal for restricted-space installations
• Weather-sealed housing and potted electronics ensure long-term reliability
• AGM battery provides dependable energy storage and strong discharge performance
• Designed and manufactured in the USA; compliant with Build America/Buy America requirements
• No trenching required, reducing installation time and cost