sushidog
Well-known member
The 300 watt sharp panels I have in mind are 45voc ea. for a total of 135 volts (109.5v under load) for 3 in series. http://sunelec.com/solar-panels/high-voltage-solar-panels/sharp-300w-module-silver-frame.html
If the higher voltage 85.6voc SunPower E20s are used (72.9v under load) then I would wire them in parallel - still plenty of volts for a 48v system (and it might not kill me if I touch the wrong wire.)
I plan on using a Tristar TS-mppt-45 if going with the Sharp 300 watt panels (1800 watts) and the TS-mppt-60 if upping the power to the 6 Sunpower panels (2610 watts). If using the Sunpower I will pull one panel out of the 48v bank for recharging the 12v batteries, leaving 2175 watts on the 48v side. If using the sharp 300 watt panels I will need a seventh panel for the 12v bats, with separate Tracer 30 or 40 amp MPPT chargers (the BN models that I can program with custom charging profiles), in case I want to upgrade to lithium batteries in the future.
I will be using Bogart Engineering's new Pentametric meter to monitor both my 48 and 12v battery and charging operations with one meter. http://www.thesolar.biz/Pentametric_Meter_from_Bogart_Engineering.htm
The problem with going with a 48v system for my heat pump and inverted 120v a/c needs is that I will still need a fairly heavy 12v system with fairly heavy amp capability to operate the slide motors and jacks. I could tap 12v off the 48v bank for LED lighting, fridge control boards, blower motors, fantastic fan motors and such, using A golf cart voltage reducer, but it would take a rather big, expensive one to run the high amp slides. Plus the more power I have on board the better, right? Dealing with all the added weight will be my major challenge though. I might start with LiFePo4s on the 12v side, just as an experiment before investing major bucks for a big 48v bank of these high-tech/high-cost ultimate batteries.
For an inverter, I will be using the 2,000 watt Aims PSW inverter/charger. http://www.theinverterstore.com/2000-watt-pure-sine-inverter-charger-48-volt.html
Chip
If the higher voltage 85.6voc SunPower E20s are used (72.9v under load) then I would wire them in parallel - still plenty of volts for a 48v system (and it might not kill me if I touch the wrong wire.)
I plan on using a Tristar TS-mppt-45 if going with the Sharp 300 watt panels (1800 watts) and the TS-mppt-60 if upping the power to the 6 Sunpower panels (2610 watts). If using the Sunpower I will pull one panel out of the 48v bank for recharging the 12v batteries, leaving 2175 watts on the 48v side. If using the sharp 300 watt panels I will need a seventh panel for the 12v bats, with separate Tracer 30 or 40 amp MPPT chargers (the BN models that I can program with custom charging profiles), in case I want to upgrade to lithium batteries in the future.
I will be using Bogart Engineering's new Pentametric meter to monitor both my 48 and 12v battery and charging operations with one meter. http://www.thesolar.biz/Pentametric_Meter_from_Bogart_Engineering.htm
The problem with going with a 48v system for my heat pump and inverted 120v a/c needs is that I will still need a fairly heavy 12v system with fairly heavy amp capability to operate the slide motors and jacks. I could tap 12v off the 48v bank for LED lighting, fridge control boards, blower motors, fantastic fan motors and such, using A golf cart voltage reducer, but it would take a rather big, expensive one to run the high amp slides. Plus the more power I have on board the better, right? Dealing with all the added weight will be my major challenge though. I might start with LiFePo4s on the 12v side, just as an experiment before investing major bucks for a big 48v bank of these high-tech/high-cost ultimate batteries.
For an inverter, I will be using the 2,000 watt Aims PSW inverter/charger. http://www.theinverterstore.com/2000-watt-pure-sine-inverter-charger-48-volt.html
Chip
