This is an open label pilot feasibility telemedicine study. This pilot will involve a total of 37 at-home stimulation sessions (30-minutes each) of multichannel excitatory tDCS targeting the left dorsolateral prefrontal cortex (DLPFC) administered over 8 weeks, with a follow-up period of 4 weeks following the final stimulation session.

This is an open label pilot feasibility telemedicine study. This pilot will involve a total of 37 at-home stimulation sessions (30-minutes each) of multichannel excitatory tDCS targeting the left dorsolateral prefrontal cortex (DLPFC) administered over 8 weeks, with a follow-up period of 4 weeks following the final stimulation session.

The main objective of the study is to assess the feasibility and safety of home-based tDCS for patients with MDD.

The treatment course will consist of an acute phase of 28 tDCS sessions, conducted daily (7 days per week) over 4 weeks.

Thereafter, participants will undergo a taper phase of an additional 9 sessions of tDCS applied in progressively decreasing frequency until day #60 of the study as follows:

1. Three tDCS sessions applied once every other day.
2. Three tDCS sessions applied once every third day.
3. Three tDCS sessions applied once every fourth day.

Inclusion Criteria:

1. Major Depressive Disorder
2. Age >=18
3. Currently experiencing a major depressive episode of at least four weeks' duration
4. MADRS score at least 20 at trial entry.
5. Taking at least one approved antidepressant medication (except bupropion).
6. Has a healthcare provider, and a companion who can help administer study treatments; and be able to connect frequently with study staff
7. Access to wireless internet (wifi) connection

Exclusion Criteria:

1. Any psychotic disorder.
2. Concurrent benzodiazepine medication.
3. High suicide risk
4. History of significant neurological disorder.
5. Skin lesions on the scalp at the proposed electrode sites.
6. Pregnancy.
7. Any antidepressant medications will be permitted (except bupropion) provided the medication dose has been unchanged for 4 weeks prior to trial entry.
8. Any cranial metal implants (excluding ≤1 mm thick epicranial titanium skull plates and dental fillings) or
9. Medical devices (i.e. cardiac pacemaker, deep brain stimulator, medication infusion pump, cochlear implant, vagus nerve stimulator);
10. Previous surgeries opening the skull leaving skull defects capable of allowing the insertion of a cylinder with a radius greater or equal to 5 mm.
11. Substance use disorder (including alcohol) within the past year.