@KaunganaDoDo nailed it!

This will not work, Mr president. Please determine the actual cost of electricity and let people pay just that. If you want to reduce cost, work first on inefficiencies at Kenya power. And it's better when govt works quietly, we prefer when you just announce after review behind the scenes is complete, that tariffs have reduced

Uhuru orders review of electricity tariffs for SMEs

How can electricity tariffs be reduced (reviewed) without renegotiating thermal PPAs?
I occasionally drive by Athi-River Gulf Power and i have never found it generating power i.e they just being paid to sit idle Thanks to Kiraitu Murungi and Kibaki company. An idea is for GoK to renegotiate with Rabai & Tsavo whose PPA ends in 2023 for an early exit.

1) Ministry of Energy has made application to stop charging VAT on Fuel Levy component of electricity bill as that amounts to double taxation as Fuel already taxed VAT.

2) As per Aug 2018 KNBS figures Thermal generation contribution was 9% in July 2018 down from a high of 30% in February 2018 but consumer hasn't seen the reduced price of more Geothermal and Hydro generation [Thanking the long rains 2018] .

3) As of 16.10.2018 LTWP is averaging 139 MW with 212/365 wind turbines online but this cheap wind energy is not hitting consumers pockets.

4) Early 2019 Kengen will online 168 MW of Olkaria V but Jubilee Govt has lied before how geothermal power will reduce our bills but i remain hopeful.

Let's wait and see if the president directive will be obeyed

Off topic but, my thoughts on why is power expensive?

Poorly negotiated PPAs. Not just the energy costs, other costs such as capacity factors.

Excess generation. Someone has to pay for excess powe generation. It's always the consumer through:
1. Higher Tariff
2. Government subsidies (ultimately borne by consumer's tax)