How do I tie a PV system and a generator into a building supply if I am paralleling co-gen units and PV systems into a single building service?
-Barbara in non-resident
Jun. 1, 2016
Read More »
Bill Haman, P.E.
Program Manager

Connecting a distributed generation system to the electric utility grid requires a design and installation [...]

Read More »
Is it practical to construct a PV array system on old barn roofs rather than tear the barns down?
-Joel in Iowa
Oct. 26, 2015
Read More »
Bill Haman, P.E.
Program Manager

Even if the orientation of the barns is ideal for solar PV, the condition of [...]

Read More »
Our electric bill averages $300 a month. Would solar be an option for our shop or would the payback be too far out?
-Dave in Iowa
Oct. 7, 2015
Read More »
Bill Haman, P.E.
Program Manager

The feasibility of a distributed renewable energy system is determined by analyzing the cost and [...]

Read More »
Why does wind power increase as the cube, not the square of speed?
-Richard in Seattle
Oct. 7, 2015
Read More »
Bill Haman, P.E.
Program Manager

The kinetic energy of the wind can be expressed by the equation: K.E. = 0.5mU2 [...]

Read More »
Are the average solar production rates provided in the Iowa Energy Center solar calculator based on a panel size of 1 kwh per sq meter of panel?
-Mike in Iowa
Jun. 30, 2015
Read More »
Bill Haman, P.E.
Program Manager

The Iowa Energy Center Solar Calculator provides the energy output of a PV system sized [...]

Read More »
I am planning to install a distributed generation system at my home and need to know how it can be connected to the grid and the rate at which the utility company will purchase my excess power.
-Iowa
Jun. 30, 2015
Read More »
Bill Haman, P.E.
Program Manager

All electric grid connected systems require the notification and interconnection agreement of the servicing electric [...]

Read More »