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Solar Pump Drives now available for PMSM , AC Induction and Solar Induction motors

Will I save Money If I Install Solar ?

    Yes that is the bottom line isn’t it ? Should be straight forward to answer if – the Ifs and but(s) appear and the issue becomes too confusing.  Let me explain why. Installed Wp Vs What we actually get on field.  Wp rating of the Solar Panel is…

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REhub now adds an LCD screen

As REhub started getting sold in different parts of India – one request we kept getting was the need for a display – it does not surprise me at all . I jog regularly and need the iPod Nano telling me the minutes I took to run each kilometer and…

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PWM, MPPT and measuring real output

Yesterday I received a call from a system integrator – who has been installing solar systems using PWM charge controllers and is looking at switching to MPPT charger.  He has an experimental set up with a 200 AH batteries, 48V, 2500 Wp Solar panels : 250 Wp X 10 nos ,…

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How much Solar PV should I install in my home

This is another very commonly asked question.Here are some guidelines to determine the size of install in India. Money as a constraint : If Rooftop schemes with reverse or net metering is available in your locality ( not unless you are in Gandhinagar for example http://mnre.gov.in/file-manager/UserFiles/presentations-pwc-workshop-06092012/GEDA.pdf) install as much as you have…

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Does MPPT make sense in Indian Conditions

As we interact with a variety of different solar system installers, we have got this question repeatedly – does MPPT make sense in Indian conditions. The implied question is – MPPT controllers cost more than the PWM counterparts – is it worth the while to add this cost to the…

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How a good MPPT charge controller (e.g. REhub) reduces system costs

REhub  is based on an high efficiency MPPT charge controller with the ability to accept a wide input MPPT range ( e.g 17 – 65 V for a 12V battery system). System_integrators can use this to their advantage by a) Selecting PV panels that are mass produced and therefore of lower…

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