def _pdp_credits():
    """ peak demand credits data
        would like to integrate this above, but didnt want to mess with
        code if you call the above somehwere else
        pdpkwh : dictionary with pdp per [kwh] energy credits; keys are tarrifs
        pdpdem : dictionary with pdp demand credits; keys are tarrifs
        pdpchg : dictionary with pdp charges; keys are tarrifs
    """
    pdpkwh = {'A1TOU': {'Summer': {'Peak': 0.01016, 'PartialPeak': 0.01016,
        'OffPeak': 0.01016}, 'Winter': {'PartialPeak': 0.0, 'OffPeak': 0.0}
        }, 'A6TOU': {'Summer': {'Peak': 0.1217, 'PartialPeak': 0.02434,
        'OffPeak': 0.0}, 'Winter': {'PartialPeak': 0.0, 'OffPeak': 0.0}},
        'A10TOU_secondary': {'Summer': {'Peak': 0.00641, 'PartialPeak': 
        0.00641, 'OffPeak': 0.00641}, 'Winter': {'PartialPeak': 0.0,
        'OffPeak': 0.0}}, 'A10TOU_primary': {'Summer': {'Peak': 0.00608,
        'PartialPeak': 0.00608, 'OffPeak': 0.00608}, 'Winter': {
        'PartialPeak': 0.0, 'OffPeak': 0.0}}, 'A10TOU_transmission': {
        'Summer': {'Peak': 0.00344, 'PartialPeak': 0.00344, 'OffPeak': 
        0.00344}, 'Winter': {'PartialPeak': 0.0, 'OffPeak': 0.0}},
        'E19TOU_secondary': {'Summer': {'Peak': 0.0, 'PartialPeak': 0.0,
        'OffPeak': 0.0}, 'Winter': {'PartialPeak': 0.0, 'OffPeak': 0.0}},
        'E19TOU_primary': {'Summer': {'Peak': 0.0, 'PartialPeak': 0.0,
        'OffPeak': 0.0}, 'Winter': {'PartialPeak': 0.0, 'OffPeak': 0.0}},
        'E19TOU_transmission': {'Summer': {'Peak': 0.0, 'PartialPeak': 0.0,
        'OffPeak': 0.0}, 'Winter': {'PartialPeak': 0.0, 'OffPeak': 0.0}}}
    pdpdem = {'A1TOU': {'Summer': 0.0, 'Winter': 0.0}, 'A6TOU': {'Summer': 
        0.0, 'Winter': 0.0}, 'A10TOU_secondary': {'Summer': 2.89, 'Winter':
        0.0}, 'A10TOU_primary': {'Summer': 2.74, 'Winter': 0.0},
        'A10TOU_transmission': {'Summer': 3.04, 'Winter': 0.0},
        'E19TOU_secondary': {'Summer': {'peak': 6.19, 'ppeak': 1.34},
        'Winter': 0.0}, 'E19TOU_primary': {'Summer': {'peak': 5.99, 'ppeak':
        1.16}, 'Winter': 0.0}, 'E19TOU_transmission': {'Summer': {'peak': 
        5.51, 'ppeak': 1.22}, 'Winter': 0.0}}
    pdpchg = {'A1TOU': 0.6, 'A6TOU': 1.2, 'A10TOU': 0.9, 'E19TOU': 1.2}
    return pdpkwh, pdpdem, pdpchg
