EP-SYF-4M Micro Pivot DC Gear Motor — 48V Solar-Compatible, 254:1 Extreme Ratio

EP-SYF-4M Micro Pivot DC Gear Motor — Product Overview

The Only DC-Powered Irrigation Drive

Every other Korea Ever-Power irrigation gear motor uses AC power — requiring connection to the electrical grid or a generator. The EP-SYF-4M breaks this dependency entirely by using a 48V permanent-magnet DC motor that runs directly from solar panels, battery banks, or any 48V DC power source. No inverter, no frequency converter, no grid connection. For the hundreds of millions of small farms and pastoral operations worldwide that lack reliable grid electricity, the EP-SYF-4M makes mechanized center-pivot irrigation possible for the first time.

4.75 RPM — The Slowest Output in the Catalog

The DC motor operates at 1,200 rpm (slower than the 1,740 rpm of AC motors), which produces 4.75 rpm through the 254 : 1 ratio — approximately one revolution every 12.6 seconds. This ultra-slow output is even gentler than the EP-SYF-4’s 6.8 rpm, providing the most uniform water distribution achievable from any Korea Ever-Power center drive. On micro pivot systems covering small orchards or nurseries, this crawling speed ensures every square meter receives equal irrigation time.

1/8 HP from a 250W Solar Array

The EP-SYF-4M’s permanent-magnet DC motor draws just 1/8 HP (93 watts) at full load, with a current draw of 2.45 AMPS at 48V. A modest 250–400W solar panel array provides sufficient power to run the gear motor during daylight hours, with a 48V battery bank enabling extended operation through cloud cover or into evening. The low power requirement also means the complete solar+battery+gear motor system costs a fraction of what grid-connected irrigation infrastructure requires.

Vollständige technische Spezifikationen

48V DC Motor Architecture — Built for Off-Grid Power

The EP-SYF-4M’s permanent-magnet DC motor is fundamentally different from the AC induction motors used on all other Korea Ever-Power irrigation drives. Each design choice serves the off-grid mission:

Solar-Powered Micro Pivot — Complete System Architecture

Minimum Solar Configuration

The EP-SYF-4M draws approximately 93 watts at full load. A 250W solar panel provides sufficient power for daytime-only operation with margin for cloud cover. For extended operation through overcast conditions or evening hours, a 400W panel paired with a 48V battery bank (100–200 Ah capacity) provides 8–16 hours of autonomous irrigation per full charge. A standard 48V solar charge controller manages the panel-to-battery-to-motor power flow without any custom electronics.

Complete Off-Grid Power Path

The full solar micro pivot system consists of just four electrical components: solar panel(s) → 48V charge controller → 48V battery bank → EP-SYF-4M gear motor. No inverter, no transformer, no frequency converter, no grid connection point. A timer or irrigation controller between the battery and motor automates the irrigation schedule. The entire electrical system can be installed by a technician with basic DC wiring skills — no licensed electrician is required for low-voltage DC systems in most jurisdictions.

Total System Cost Advantage

A complete solar-powered micro pivot system (panels + battery + controller + EP-SYF-4M + micro pivot frame + sprinklers) costs a fraction of a grid-connected standard pivot system. There are no monthly electricity bills, no utility connection fees, and no ongoing fuel costs for a generator. For small farms and development projects in regions where grid electricity costs $0.15–0.30/kWh, the solar micro pivot typically pays for itself within 2–4 irrigation seasons through eliminated electricity costs alone.

EP-SYF-4M vs. EP-SYF-4 — DC Gear Motor or AC Gearbox?

Feldanwendungsszenarien

Remote Pastoral Livestock Stations

Cattle and sheep stations in Mongolia, Central Asia, Australia’s outback, and Africa’s pastoral regions need green grazing circles around water points located far from any electrical grid. The EP-SYF-4M drives a solar-powered micro pivot that maintains irrigated pasture without any grid infrastructure. The 48V DC system runs entirely from solar panels during the growing season, requiring no fuel, no generator maintenance, and no utility bills.

Off-Grid Small Farm Irrigation

Small farms in developing regions of Southeast Asia, Sub-Saharan Africa, and South Asia lack reliable grid electricity but have abundant sunlight. The EP-SYF-4M makes mechanized pivot irrigation accessible to these farms for the first time: a 250W solar panel, a 48V battery, and the gear motor create a complete automated irrigation system at a cost that subsistence and smallholder farms can afford — especially when supported by agricultural development funding.

Agricultural Development Projects

International development organizations, NGOs, and government agricultural agencies deploying irrigation projects in off-grid regions specify the EP-SYF-4M because the entire system — solar panels, batteries, charge controller, and gear motor — can be shipped, installed, and maintained by local technicians without specialized electrical training. The DC system has no high-voltage components, making it safer for communities with limited technical infrastructure.

Why Choose the EP-SYF-4M

Installation und Wartung

Mounting Procedure

❶ Bolt the EP-SYF-4M to the micro pivot tower frame using the 3.375″×4.5″ mount pattern.

❷ Connect the 48V DC power wiring from the charge controller or battery bank to the motor terminals. Observe polarity — reversing polarity reverses rotation direction.

❸ Connect the output shaft to the micro pivot Antriebswelle or arm-drive mechanism.

❹ Verify oil level (shipped pre-filled). Apply 48V power and verify smooth 4.75 rpm output rotation in the correct direction.

Wartungsplan

◆ Start of irrigation season — Check oil level; inspect DC wiring connections; clean solar panels.

◆ Every 1,500 hours / annually — Full oil change (0.5 L); inspect motor brushes (if applicable) or permanent magnet condition.

◆ Every 3,000 hours — Inspect gear mesh; check output shaft wear; verify battery health.

◆ End of season — Disconnect battery to prevent deep discharge; store panels securely; top off gearbox oil.

Companion Products & Solar System Components

AC Gearbox-Only Version

For grid-connected micro pivots, the EP-SYF-4 gearbox-only accepts any NEMA 48-C AC motor, providing the same 254 : 1 ratio at 6.8 rpm output (slightly faster than the DC version’s 4.75 rpm due to the higher AC motor input speed).

Landwirtschaftliche Getriebe

Small farms using solar micro pivots also run Getriebe für Rotationsgrubber assemblies for tillage and Getriebe für Rundballenpresse units for seasonal straw management.

Häufig gestellte Fragen

Kundenrezensionen und Feldberichte