I have had to put in a whole house generator for power outage emergencies and having someone in home that is dependant upon oxygen, hospital bed and a Lift chair. It took all of my savings to do so. Does anyone know of organizations/charities that help defray some of the cost?
Years ago my community used to get HUD funds for emergency repairs. I don't know if that HUD program is still in effect, and/or whether it can award funds after an installation is done. But it's worth contacting the local community. If I recall correctly, it was the Building Department that handled these grants.
Or you could research and/or contact HUD directly to find out what grants are available, then contact your local community.
My county has a home improvement loan service; I haven't contacted them but it's possible a similar local governmental department may know of sources.
Did you ask the installation team if they know anyone? Sometimes contractors, especially those who focus on installations and/or retrofits for older or compromised people, are aware of sources for assistance.
You might also contact the local Senior Center, the Alzheimer's Assn., or the local Jewish Welfare Federation for suggestions. I've found each of them to be very good at providing lists for potential sources.