diff --git a/omf/solvers/__init__.py b/omf/solvers/__init__.py
index dcaf42343..ea7b8455b 100644
--- a/omf/solvers/__init__.py
+++ b/omf/solvers/__init__.py
@@ -17,4 +17,5 @@
 from omf.solvers import mohca_cl
 from omf.solvers import sdsmc
 from omf.solvers import reopt_jl
-from omf.solvers import protsetopt
+#from omf.solvers import protsetopt
+from omf.solvers import der_cam
diff --git a/omf/solvers/der_cam/README.md b/omf/solvers/der_cam/README.md
new file mode 100644
index 000000000..90cd9bb7d
--- /dev/null
+++ b/omf/solvers/der_cam/README.md
@@ -0,0 +1,24 @@
+mmm.solvers.der-cam
+
+Solver for Lawrence Berkeley National Laboratory (LBNL) DER-CAM API
+
+Before running:
+- acquire an API key : request a DER-CAM account here: https://dercam-app.lbl.gov/
+
+# Functions (WIP)
+`__init__.py`
+```
+>> run ( path, modelFile="", reoptFile="", timeout=0 )
+
+>> print_existing_models ( userKey )
+```
+
+# Input options:
+
+- modelFile : single-node or multi-node input (Excel file)
+- reoptFile : REopt.jl input (json file) -> Scenario_test_POST.json
+
+# Outputs:
+
+- results.csv
+- results-nodes.csv 
diff --git a/omf/solvers/der_cam/__init__.py b/omf/solvers/der_cam/__init__.py
new file mode 100644
index 000000000..39a0a1614
--- /dev/null
+++ b/omf/solvers/der_cam/__init__.py
@@ -0,0 +1,312 @@
+import os, time, json, platform
+import pandas, openpyxl
+import requests as req
+import keyring
+
+urlBase = 'https://microgrids1.lbl.gov:4000/api/xls' 
+fileMimeType = 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
+
+lock_file = "lock_file.txt"
+
+thisDir = os.path.abspath(os.path.dirname(__file__))
+
+def get_credentials():
+    '''returns API key for current user from keyring'''
+    userKey = keyring.get_password("my_program", "user")
+    return userKey
+
+def set_credentials():
+    '''sets current user's API key using keyring'''
+    userKey = input("Enter your API key for the DER-CAM API ( sign up found here: https://dercam-app.lbl.gov/u/api ): ")
+    keyring.set_password("my_program", "user", userKey)
+    return userKey
+
+def testfile_path(fileName):
+    ''' returns file path to the given file within testFiles folder '''
+    return os.path.normpath(os.path.join(thisDir,"testFiles",fileName))
+
+def check_for_existing_file( der_cam_file ):
+    ''' removes previous der_cam input file '''
+    if os.path.exists( der_cam_file ):
+        os.remove( der_cam_file )
+
+def build_input_spreadsheet(path, reopt_input_file, der_cam_file_name ):
+    ### work in progress
+    '''builds file input for der-cam api given REopt input json'''
+
+    reopt_file_path = os.path.normpath(os.path.join(path,reopt_input_file))
+    der_cam_file_path = os.path.normpath(os.path.join(path,der_cam_file_name))
+
+    #load reopt input file (reopt_input_file -> input_json)
+    with open(reopt_file_path) as j:
+        input_json = json.load(j)
+
+    #load default der-cam excel input (test.xlsx)
+    base_file = testfile_path("test.xlsx")
+    xls = pandas.ExcelFile(base_file)
+    sheets = xls.sheet_names
+
+    check_for_existing_file(der_cam_file_path)
+    create_new_file = True
+
+    financial = input_json.get("Financial",None)
+    pv = input_json.get("PV",None)
+    wind = input_json.get("Wind",None)
+    es = input_json.get("ElectricStorage",None)
+    generator = input_json.get("Generator",None)
+
+    def set_invest(df, tech, min, existing, max):
+        #for min_kw <= max_kw & existing_kw <= max_kw (todo: input checking for user interface portion)
+        if existing > 0:
+            df.at[tech,"FixedInvest"] = 0
+            df.at[tech,"ForcedInvestCapacity"] = existing
+            df.at[tech,"ExistingYN"] = 1
+        elif min > 0:
+            df.at[tech, "FixedInvest"] = 0
+            df.at[tech,"ForcedInvestCapacity"] = min
+        elif max > 0:
+            df.at[tech,"FixedInvest"] = 0
+        return df
+
+    #save each sheet (some with replacements) to new der-cam excel input file (der_cam_file_name)
+    for sheet in sheets:
+        hasIndex = True
+        hasHeader = False
+        if sheet == "FinancialSettings":
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df.at["DiscRate",df.columns[0]] = financial.get("offtaker_discount_rate_fraction")
+            df.at["MaxPaybackPeriod",df.columns[0]] = financial.get("analysis_years")
+
+        if sheet == "GeneralReliabilityParams":
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df.at["VOLL",df.columns[0]] = financial.get("value_of_lost_load_per_kwh")
+
+        if sheet == "SolarCostParameters" and pv != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df.at["PV","VariableCost"] = pv.get("installed_cost_per_kw")
+            df.at["PV","Lifetime"] = pv.get("macrs_option_years")
+
+        if sheet == "SolarInvestParameters" and pv != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, index_col=0)
+            #hasHeader = True
+            df = set_invest(df, "PV", pv.get("min_kw"), pv.get("existing_kw"), pv.get("max_kw"))
+
+        if sheet == "PowerExportOptions" and pv != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            can_export = int(pv.get("can_export_beyond_nem_limit"))
+            df.at["NetMetering",df.columns[0]] = can_export 
+            df.at["RenewableExport",df.columns[0]] = can_export
+
+        if sheet == "GeneralTechConstrains" and pv != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df.at["allowPVCurtailment",df.columns[0]] = int(pv.get("can_curtail"))
+
+        if sheet == "WindGeneratorPar" and wind != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df.at["WindRateCapacity",df.columns[0]] = 50 #using fixed capacity per wind generator unit for calculation purposes
+            df.at["WindCapitalCost",df.columns[0]] = 50 * wind.get("installed_cost_per_kw")
+            df.at["WindLifeTime",df.columns[0]] = wind.get("macrs_option_years")
+
+        if sheet == "WindGeneratorForcedInvest" and wind != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df = set_invest(df, "node1", wind.get("min_kw"), 0, wind.get("max_kw"))
+
+        if sheet == "StorageCostParameters" and es != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, index_col=0)
+            hasHeader = True
+            df.at["ElectricStorage","VariableCost"] = es.get("installed_cost_per_kw")
+            #df.at["ElectricStorage","VariableOM"] = electricStorage.get("replace_cost_per_kwh") * 24 * 30
+            df.at["ElectricStorage","Lifetime"] = es.get("battery_replacement_year")
+            #df.at["maxs"] = electricStorage.get("max_kw") / 2000
+            #df.at["capcost"] = electricStorage.get("replace_cost_per_kw")
+
+        if sheet == "StorageInvestParameters" and es != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, index_col=0)
+            #hasHeader = True
+            df = set_invest(df, "ElectricStorage",es.get("min_kw"),0,es.get("max_kw"))
+
+        if sheet == "BattInverterParameters" and es != None:
+            #choosing 2000kw inverter type to update (temporary)
+            df = pandas.read_excel(base_file, sheet_name=sheet, index_col=0)
+            hasHeader = True
+            df.at["BattInverter_2000kw","Lifetime"] = es.get("inverter_replacement_year")
+
+        if sheet == "ElecStorageStationaryParameter" and es != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None, index_col=0)
+            df.at["DiscreteSize",df.columns[0]] = es.get("max_kwh")
+
+        if sheet == "LFGenSetOPT" and generator != None:
+            df = pandas.read_excel(base_file, sheet_name=sheet, index_col=0)
+            df.at["LFGS01","capcost"] = generator.get("installed_cost_per_kw")
+            df.at["LFGS01","OMFix"] = generator.get("om_cost_per_kw")
+            df.at["LFGS01","lifetime"] = generator.get("macrs_option_years")
+            df.at["LFGS01","BackupOnly"] = int(generator.get("only_runs_during_grid_outage"))
+            df.at["LFGS01","Fuel"] = 4
+            df.at["LFGS01","Type"] = 3
+
+        if sheet == "EnableInvestment":
+            df = pandas.read_excel(base_file, sheet_name=sheet, index_col=0)
+            hasHeader = True
+            df.at["node1","GenSetInvest"] = int(generator != None)
+            df.at["node1","SolarInvest"] = int(pv != None)
+            df.at["node1","StorageInvest"] = int(es != None)
+            df.at["node1","WindInvest"] = int(wind != None)
+        else:
+            df = pandas.read_excel(base_file, sheet_name=sheet, header=None)
+            hasIndex = False
+
+        if create_new_file:
+            df.to_excel(der_cam_file_path, sheet_name=sheet, index=hasIndex, header=hasHeader)
+            create_new_file = False
+        else:
+            with pandas.ExcelWriter(der_cam_file_path, mode='a') as writer:
+                df.to_excel(writer, sheet_name=sheet, index=hasIndex, header=hasHeader)
+
+    print(f"successfully created der-cam input at {path}/{der_cam_file_name}")
+
+#######################################################################
+### functions for posting model to API and checking for model results
+#######################################################################
+
+def check_timeout(start_time, timeout):
+    if timeout != 0:
+        current_time = time.time()
+        if current_time - start_time >= timeout:
+            return True
+    return False
+
+def check_lock(lock_path, timeout):
+    ''' checks if another API call is running and prints statement if so '''
+    printed = False
+    current_time = time.time()
+    while os.path.exists(lock_path):
+        if not printed:
+            print("30 second wait required between DER-CAM API calls - waiting ...")
+            printed = True
+        if check_timeout(current_time, 30):
+            print("30 seconds have passed: an error may be causing the lock file to not be released correctly")
+        if check_timeout(current_time, timeout):
+            print(f"error: timeout of {timeout} seconds reached while waiting for lock file to release")
+            return 
+
+def release_lock(start_time, lock_path):
+    ''' waits for up to 30 seconds before releasing API lock to ensure that API limits are followed '''
+    end_time = time.time()
+    sleep_time = 30 - ( end_time - start_time )
+    if sleep_time > 0:
+        print(f'sleeping for {sleep_time} seconds')
+        time.sleep(sleep_time)
+    os.remove(lock_path)
+    print("lock released")
+
+def check_model_status( modelKey, userKey ):
+    ''' checks status of posted model '''
+    urlKey = f'{urlBase}/{userKey}/model/{modelKey}'
+    response = req.get(urlKey)
+    model = response.json()['model']
+    return model['results_available'], model['status'], model['msg']
+
+def get_model_results( modelKey, userKey, modelHasResults ):
+    ''' accesses available results '''
+    if modelHasResults == 1:
+        urlResults = f'{urlBase}/{userKey}/model/{modelKey}/results'
+        resultsResponse =  req.get(urlResults)
+        return resultsResponse.json()['model']
+    else:
+        print(f"error: model results for key {modelKey} were not posted")
+
+#todo: remove any print statements that aren't useful to the user
+def solve_model(path, modelFile, timeout=0): 
+    ''' 
+    posts the model file to the DER-CAM API, waits to receive results, 
+    saves results to testFiles/results.csv and testFiles/results_nodes.csv,
+    and ensures total runtime of at least 30 seconds per call (to meet API limits)
+    '''
+    userKey = get_credentials()
+    if userKey == None:
+        userKey = set_credentials()
+
+    modelFilePath = os.path.normpath(os.path.join(path, modelFile))
+    files = {'modelFile': ('model.xlsx', open(modelFilePath, 'rb'), fileMimeType, {'Expires': '0'})}
+    urlRequest = f'{urlBase}/{userKey}/model'
+    data={ 'label': "example model post request", 'version': 5.9 }
+    
+    lock_path = os.path.normpath(os.path.join(thisDir,lock_file))
+    check_lock(lock_path,timeout)
+    
+    if not os.path.exists(lock_path):
+        with open(lock_path, 'w') as f:
+            f.write(str(os.getpid()))
+            print(f"lock acquired at: {lock_path}")
+        #posts model to API
+        response = req.post(url=urlRequest, data=data, files=files)
+        start_time = time.time()
+        print(f"response.status_code: {response.status_code}, response.reason: {response.reason}")
+        modelResponse = response.json()['model']
+        #acquires key for given model
+        modelKey = modelResponse['model_key']
+
+        modelHasResults, modelStatus, modelMsg = check_model_status( modelKey, userKey )
+        if modelStatus == "failed":
+            release_lock(start_time, lock_path)
+            print(f"error: {modelMsg}")
+            return 
+
+        #waits for model to solve
+        while modelHasResults != 1:
+            #add waiting period between checks? (doesn't seem to have limits on requests, only posting models)
+            modelHasResults, modelStatus, modelMsg = check_model_status( modelKey, userKey )
+            if modelStatus == "failed":
+                release_lock(start_time, lock_path)
+                print(f"error: {modelMsg}")
+                return
+            if check_timeout(start_time, timeout):
+                release_lock(start_time, lock_path)
+                print(f"error: timeout of {timeout} seconds reached while waiting for model results")
+                print(f"results available: {modelHasResults}, status: {modelStatus}, msg: {modelMsg}")
+                return 
+
+        solvedModel = get_model_results( modelKey, userKey, modelHasResults )
+        
+        #todo: add optional function inputs for output file names
+        with open(os.path.normpath(os.path.join(path,"results.csv")), 'w') as f:
+            f.write(solvedModel['results'])
+            
+        with open(os.path.normpath(os.path.join(path,"results_nodes.csv")), 'w') as f:
+            f.write(solvedModel['resultsNodes'])
+
+        print(f'model competed: results saved to {path}/results.csv and {path}/resultsNodes.csv')
+        
+        release_lock(start_time, lock_path)
+
+def print_existing_models(userKey):
+    ''' prints all existing models saved to the account associated with the specified API key '''
+    response = req.get(f'{urlBase}/{userKey}/model')
+    myModels = response.json()['models']
+    print("existing models: ")
+    print(myModels)
+
+
+#def print_model( modelKey ):
+#    ''' prints results from the model with the given API key if it exists in the users account '''
+
+def run(path, modelFile="", reoptFile="", timeout=0):
+    ''' 
+    if reoptFile provided (json) : translates to der-cam input sheet and solves model 
+    if modelFile provided (xlsx) : solves given modelFile
+    '''
+    if modelFile == "" and reoptFile == "":
+        return "error: enter modelFile and/or reoptFile to translate into modelFile"
+    elif modelFile == "":
+        build_input_spreadsheet(path, reoptFile, "der_cam_inputs.xlsx")
+        modelFile = "der_cam_inputs.xlsx"
+    solve_model(path, modelFile, timeout=timeout)
+
+
+def _test():
+    run(os.path.normpath(os.path.join(thisDir,"testFiles")), modelFile="test.xlsx")
+
+    #print_existing_models()
+
+if __name__ == "__main__":
+    _test()
\ No newline at end of file
diff --git a/omf/solvers/der_cam/testFiles/test.xlsx b/omf/solvers/der_cam/testFiles/test.xlsx
new file mode 100644
index 000000000..d8b29d13c
Binary files /dev/null and b/omf/solvers/der_cam/testFiles/test.xlsx differ
diff --git a/requirements.txt b/requirements.txt
index 7b09b4111..d6859f9b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,3 +47,5 @@ pandapower==2.10.1
 matpowercaseframes
 fire
 haversine
+keyring
+openpyxl
\ No newline at end of file