The Suffolk Accident Rescue Service (Sars) saw fundraising reach an all-time high of £61,000 in donations and grants over the last year.
Sars provides volunteer doctors and paramedics for emergency response support to assist the East of England Ambulance Service.
Its members were present at the Springlands Way road accident in Sudbury on April 9, which resulted in the death of 18-year-old Ryan Noakes.
The charity has also attended emergencies in Long Melford, Great Cornard and Wattisham in the last year.
Group chairman Dr Pam Crispin said: “The last year has been fantastic and we are really grateful for the support we’ve received from all sectors of the community.
“This increase in income from fundraising has meant that we have been able to invest heavily in new specialist medical equipment for all our volunteer doctors and paramedics.
“Sars has helped thousands of local people since being formed in 1972 and we remain dedicated to ensuring that critically-ill people get the best possible care.”
Fundraising manager Ben Hall said the fundraising target for this year was £100,000.