Welcome to VisBis

VisBis is  the subsidiary of Luminatek company in the business of helping other companies develop products. Our engineers have many years of experience in a wide variety of fields. We now concentrate on helping other companies engineer their power needs--batteries, power supplies, inverters and D.C. to D.C. converters.

We not only engineer products, but we also manufacture products both in Utah and in China. This helps our customers and keeps us in lasting, long term relationships with both our customers and our factories.  We are truing to be cost effective and sell our products to smallest mark up. Very often we modify our existing products to your needs. For our buyers from North America, please go to Powerstream website.


News/Info

Connecting devises to solar panel

Connecting devises to solar panel

Some people treat solar panel as a battery with exact or close to exact voltage. Solar panels are made to specific applications with specific voltage parameters and wattage.
Solar Power and method to calculate  panels in accordance to your load

Solar Power and method to calculate panels in accordance to your load

Q. How big the solar panel shall be? Answer: Starting point is to calculate power consumption of your house or devise.
How to charge Lithium batteries?

How to charge Lithium batteries?

Very typical question I receive in my email: How do I charge Lithium battery?
Battery Capacity calculator. Dermines battery capacity (C) in ampere-hours (Ah) for 2 (two) sequential discharge events.

Battery Capacity calculator. Dermines battery capacity (C) in ampere-hours (Ah) for 2 (two) sequential discharge events.

This calculator determines the total required battery capacity (C) in ampere-hours (Ah) for two sequential discharge events. It accounts for the load currents (I1, I2), discharge times (t1, t2), discharge rates (Rc1, Rc2), and includes corrections for non-linear effects in internal resistance at low states of charge (SoC).

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