Re: [RE-wrenches] Charging a 108V battery bank

Hi Jason, Considering temperature affect on voltage, you would choose something just above the Vmp. As the array becomes illuminated, voltage will rise but the battery is always a full load to the PV array. Voltage will never go higher than battery OV protection while connected or the open

Re: [RE-wrenches] Charging a 108V battery bank

Hi Larry, So no MPPT in that situation and how much extra Vmp on the PV’s is recommended above operating battery Voltage? Thanks, Jason RemoteEnergy.org > On Jul 1, 2021, at 2:18 PM, la...@starlightsolar.com wrote: > > Just thought I would throw out that with an

Re: [RE-wrenches] Charging a 108V battery bank

Just thought I would throw out that with an Elite Power Solutions Li-ion battery system you can connect a PV solar source directly to the battery, no PV controller needed. The EMS will monitor each cell and open the charge relay when the battery is full. The dual solenoid controller will allow

Re: [RE-wrenches] Charging a 108V battery bank

Normally you definitely do not want to tap a high voltage battery for use at  say, 12 or in this case, maybe 48V when the top end is 108V nominal. But with a separate charger for the house inverter, (48V ?),  and the 60V side, it would work a lot better than just using a single 108V charger

Re: [RE-wrenches] Charging a 108V battery bank

Dave, This is for a boat that will stay mostly on the finger lakes and in the Erie Canal system in upstate NY. Definitely not an ocean boat. But the plan is to convert it to a full time residence, potentially in the winter as well. Cheers, Dave On Thu, Jul 1, 2021 at 11:52 AM Dave Angelini

Re: [RE-wrenches] Charging a 108V battery bank

Less is more offgrid. On a boat, if it is oceangoing, it is a life or death kind of world. A fire at sea probably will happen at night in bad seas. Not sure if this is your clients scenario for their use. An all electric boat sounds a bit scary. How will they get ashore? I use to give the owner

Re: [RE-wrenches] Charging a 108V battery bank

Bob, This is a very interesting idea to have two separate battery banks in series. I find it odd though that this particular motor's datasheet calls for 9 12V batteries. I suppose that I could have one charge controller set for 48V and the other set for 60V. Although this will also pose the

Re: [RE-wrenches] Charging a 108V battery bank

If the boat is insured or is going to leave US waters and hopes to be insured, better CYA it and check this out. NMEA may be of help also. https://www.nmea.org/content/STANDARDS/nmea_2000_certified_products We did Marine electronics on the side and cruised our sailboat for a decade. It was

Re: [RE-wrenches] Charging a 108V battery bank

If you can't find a single compatible charger, what also works it to use 2 (two) separate MPPT charge controllers each with a separate PV array inputs and connect each CC's battery to half of the battery bank.  This has worked fine for both OB and MNS controllers in past years and should

Re: [RE-wrenches] Charging a 108V battery bank

kef> From: RE-wrenches on behalf of Dave Tedeyan Sent: Wednesday, June 30, 2021 3:50:15 PM To: RE-wrenches Subject: [RE-wrenches] Charging a 108V battery bank Hi All, I am going to be working with someone who plans to completely electrify a boat. The electric motor is meant to run on ni