Search results

The C20 and C100 rating for a battery is to allow you to compare different batteries. As has been noted in the thread, for Lead/Acid chemistry you don't really want to discharge the battery below 50% or you will degrade the cycles*. For other chemistries, like LiFePO4 you can achieve 20% or...

BTW, Solar Assistant is a great piece of software. I struggled to be able to monitor my MPP LV5048 on-line but Solar Assistant came to the rescue. It was easy to set up and I use it daily to monitor the performance of my grid tied system. It was well worth the money. Any yes, it uses a...

System: Grid tied LV5048 / 2x EG4 LiFePO4 / 16 panel GND MOUNT / SOLAR ASSISTANT monitoring. Use: WELL PUMP + BARN. Works great and on sunny/partially cloudy days, recharging the BATTERIES and WATER TANK well before the sun goes down from solar alone. BUT how does it work on overcast...

Zapper, thanks for your comment. It appears to be a bug with charging caused by parameter 32 set to AUT (auto). Changing from AUT to a fixed amount, 60 mins in my case, fixes the charge current issue and allows the solar panels to operate at full power. Batteries are LiFePO4 and I do monitor...

Well, looks like this is an old probem with LV5048, which MPP Solar has not addressed. This may have no effect on your buying choices, but I have to say it doesn't fill me with confidence. The problem is related to Program 32, BULK CHARGING TIME, which is set to AUT (AUTO) and limits the...

Hi, I have an off-grid setup to power my well/boost pumps. We live in rural California, with abundant sunshine. The system comprises: 1. 16 x 325W panel ground mount 2. LV5048 3. 2 x EG4 batteries (10KW total) 4. Load is PUMPs + BARN (Lighting and miscellaneous appliances, Fan, Fridge etc)...

Thanks for your comment. Can't argue with measurements. I'll retake some measurements from my LV5048 tomorrow for the well (3/4 HP) and the booster pump (1 1/2 HP) just for comparison. BTW, both of these pumps are pretty old and both are 240V.

Not sure which columns you are using, perhaps for a 3/4 HP motor Pin = 230V x 8.4A = 1932W. But I think this is the maximum current at a SF = 1.5. For a 3/4 HP motor, the Full Load Eff (%) is specified as 62% and not (3 / 4 * 746) / (230 * 8.4 ) = 29%, as you may have calculated.

Thanks for the reply. Not sure I entirely agree with you. The rating on a motor as you say, is mechanical. So a 3/4 HP motor can provide that much mechanical power to do whatever you want, in my case pump water from a well, and meet the spec on the nameplate. The amount of mechanical...

You're right, and I should have mentioned about the PF. Measurements from the LV5048 for the 3/4 HP well pump were: POWER: 788W, 971VA The PF = 788/971 = 0.81. For 100% efficiency and PF = 1.0, the 3/4 HP* motor should use 0.75*746 = 560W(or VA). So the efficiency of the motor is 560/971...

Thanks for the reply. I think you are definitely on the right track. Well I can claim no credit for the well/booster pump combination idea, it was like that when we moved in. To answer your questions: 1. Soft Starter: Miter/Table saw soft starter is a GS10 Soft Starter. Not cheap, but...

I think you made the right call. There are some applications where soft start is OK, such as a mitre or table saw, but as I understand a standard well pump requires a large initial torque to operate correctly resulting in a high inrush current (3-5X operating current), which must be supplied...

Hi, I had a similar problem with a well pump and a booster pump in our pumphouse. If the well pump was operating and the booster pump started (inrush current), there was insufficient capacity in my LV5048 to supply the power. I used a DPDT relay with a 240V coil. I connected the 240V coil...

Hi, this is a great question. I ran into some issues, which may be helpful, adding emergency power for our pumphouse. For our water supply, we have a 400' deep well which pumps water with a submerged 3/4 HP motor, delivering ~6.5GPM to a 2500 Gallon tank. We have a 1.5 HP booster...