Knowledge Centre
Engineering notes written for the people who specify drives: how solar pumping actually works, when a soft starter beats a VFD, what an IP rating does and does not protect against, and how to size the DC side of a pump system.
How a Solar Pump Inverter Works, and Why There Is No Battery
The array feeds DC, the inverter tracks the maximum power point and varies frequency, and the pump follows the sun. Water in a tank is the storage.
Read →VFD or Soft Starter: Choosing Between Them
Both remove starting inrush. Only one of them controls speed afterwards, and that difference decides the cost of the panel.
Read →Four-Quadrant Drives: Returning Braking Energy Instead of Burning It
On cranes, elevators and high-inertia loads, an active front end feeds the recovered energy back to the grid at a power factor near 1.
Read →IP20 to IP65: Matching Drive Protection to the Site
Most drive failures in the field are environmental. The rating you need is set by dust, water, oil mist and salt — and sometimes by the coating, not the enclosure.
Read →Driving PMSM and Induction Motors From One Platform
Permanent magnet motors are more efficient and need matched control. Boray's vector platforms drive both, which matters when a customer's fleet is mixed.
Read →Sizing the DC Side: Array Voltage, Boosters and Pump Rating
The pump's AC rating fixes the DC voltage the array has to deliver. Everything else on the DC side follows from that number.
Read →Constant Pressure Water Supply Without a Pressure Tank
A PID loop in the drive holds the setpoint as taps open and close, which removes the cycling that wears out a fixed-speed booster set.
Read →Distributed Drives: Moving the Inverter Out of the Cabinet
Mounting an IP65 drive at the motor shortens the motor cable, and the motor cable is where the EMI and the copper cost live.
Read →General enquiries
Which products does Boray manufacture?
Solar pump inverters, variable frequency drives, hybrid solar inverters, soft starters, customised VFDs, solar DC voltage boosters and induction heating machines.
Which markets does Boray already supply?
Products are supplied in Asia (Philippines, India, Pakistan, Thailand, Vietnam), the Middle East (Turkey, Syria, Egypt), and across Africa and South America (Morocco, Nigeria, Brazil).
Can Boray customise a drive for our pump platform?
Yes. The customised VFD series — BR300-IP54 and SD300 — exists for exactly this, with function, protection rating and mechanical arrangement adapted to the target application.
How is quality controlled before shipment?
Production runs on two lines with digital quality control, barcode tracking and ERP management, and every product is full-load tested before delivery.
What certifications do the products hold?
Certification status is confirmed per product and per destination market — request the current certificate set for the model and country you are quoting.
What are the lead time and minimum order quantity?
Lead time and MOQ depend on the series and the configuration. Send the model, rating and quantity and Boray will confirm both.
Do you supply technical documentation?
Operation manuals and wiring diagrams are available for the drive series on request — ask for the manual for your model with your enquiry.
Who do we talk to about a project rather than a single unit?
Send the application, motor ratings and site conditions by WhatsApp or email and the engineering team will work through the specification with you.
Question not covered here?
Send it with the motor and site details. The engineering team answers specification questions directly.
WhatsApp +86 189 2640 9646 Email the engineering team All contact details