I am setting up a 12 volt solar system for my shed. I have 3 *315 watt Suntech Poly Panels, a Victron 150 / 100 mppt controller, Victron BMV 700 battery monitor, and a 12/24 v 65 amp battery protector, connected to 4 * 6v 520 amp batteries. (Total 1040 amp storage) The regulator will allow me to upgrade to 24 v and then 48 v as time goes by, and we live on the property full time.
We estimate that we will use approx 120 amps a day. (Between 1500 - 1800 watts day) This gives me 4 days back up from the batteries with a 50% capacity. (I will assume the panels will produce 20 amps a day in inclement weather.) I know we normally speak in wattage for total power draw, but amps for myself, works better when comparing battery storage.
According to our calcs, the 3 panels wired in series will produce around 70amps to the MPPT regulator per sun hour... Our area has an average of 4.8 sun hours a day.
I understand the nuances between float charge and full charge etc...My questions are 3 fold. Perhaps 4.
1.) Does 70amps going into the regulator equate to 70 amps hour going into the battery system?
2.) What size fuse would you recommend I use for the system between the batteries and the load. I have a 12/24v Powertech 6 way illuminated switch panel to wire the various lights and equipment to. Which totals in 35 amps total for the unit. Each switch varies in its breaker switch between 5 to 10 amps.
3.) What size invertor would you recommend I use on a 12 volt system. I have a small 350 watt power tech, which I use off a 120 watt panel system to recharge my power tool batteries. We also have a 3000 watt invertor on our caravan, which we don't use, and I can salvage from it. But, our intention is mostly to use 12 volt appliances. ( I know 24 volt, and 48 volt is a much better system, but for now, 12 volt is what our budget allows for.)
4.) Do I have to ground the system somewhere between the batteries and the panels.
Thanks in advance... P.s the panels will be ground mounted and not roof mounted.
We estimate that we will use approx 120 amps a day. (Between 1500 - 1800 watts day) This gives me 4 days back up from the batteries with a 50% capacity. (I will assume the panels will produce 20 amps a day in inclement weather.) I know we normally speak in wattage for total power draw, but amps for myself, works better when comparing battery storage.
According to our calcs, the 3 panels wired in series will produce around 70amps to the MPPT regulator per sun hour... Our area has an average of 4.8 sun hours a day.
I understand the nuances between float charge and full charge etc...My questions are 3 fold. Perhaps 4.
1.) Does 70amps going into the regulator equate to 70 amps hour going into the battery system?
2.) What size fuse would you recommend I use for the system between the batteries and the load. I have a 12/24v Powertech 6 way illuminated switch panel to wire the various lights and equipment to. Which totals in 35 amps total for the unit. Each switch varies in its breaker switch between 5 to 10 amps.
3.) What size invertor would you recommend I use on a 12 volt system. I have a small 350 watt power tech, which I use off a 120 watt panel system to recharge my power tool batteries. We also have a 3000 watt invertor on our caravan, which we don't use, and I can salvage from it. But, our intention is mostly to use 12 volt appliances. ( I know 24 volt, and 48 volt is a much better system, but for now, 12 volt is what our budget allows for.)
4.) Do I have to ground the system somewhere between the batteries and the panels.
Thanks in advance... P.s the panels will be ground mounted and not roof mounted.
Comment