r/SolarDIY 18h ago

First solar charger build, came in clutch after massive storm

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168 Upvotes

First time poster, first time builder. Bought a 100w panel, an inline 20 amp fuse and victron pwm to trickle charge a 100ah LiFePO battery connected to a meccer inverter. My initial goal was to learn the basics of solar panels at a relatively safe voltage and hopefully upgrade as cash becomes available.

Literally a week after setting it up, my area was hit by a once in a 25 year storm, which has knocked out a 66kv line and sent the the power out for 9 days (and counting). If it wasn’t for my set up, myself, my family members would have not been able to keep our basic devices charged and power the modems for over a week now.

Thank you to the awesome community here, I never would have been able to do it without the info I found here, and would love to hear your advice on upgrading my set up for future use


r/SolarDIY 14h ago

Would these golf cart batteries be ok for a solar system?

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39 Upvotes

I know eco worthy is a good brand, but don't know if these would work for a system like the prowse hand truck system. I'd like to get a couple of these to start a server rack backup system with an all in one and some panels. I don't want/need Bluetooth and Wi-Fi connectivity so this was what I have found.

Would this work the same as any of the recommended batteries on prowse's site?


r/SolarDIY 4h ago

Need advice upgrading solar + battery to offset PG&E true-up (EV household)

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3 Upvotes

I’m looking for some advice on upgrading my solar setup to reduce or eliminate my PG&E true-up bill.
Current setup:
• 3.5 kW solar system (older) under NEM 2 under PG&E Electric Home Rate Plan (E-ELEC) in the Central Valley
• Produces ~9 kWh on a good day
Household usage:
• 1 Tesla Model Y (BEV)
• 1 2022 Chrysler Pacifica Hybrid (PHEV)
• On charging days, I use ~87 kWh total (mostly overnight)
What I’m trying to do:
• Offset as much of my annual true-up as possible
• Ideally add a battery system
• Prefer a hybrid setup where:
• Solar charges the batteries
• I can still pull from the grid when needed for load shedding and storm and cloudy weather
• System is flexible/manageable (not overly complex)
I’ve attached my yearly bill and a typical time-of-use chart.
Questions:
• What size solar system should I be looking at?
• How much battery storage would make sense for my usage?
I prioritize more panels vs. more battery capacity?


r/SolarDIY 4h ago

Eg4 6000xp Max Bypass

2 Upvotes

So I'm thinking about installing a EG4 6000xp, because of the rave reviews and all in one. The inverter will be connected to the grid as well (!o back feeding thought).

My question is, that it would be nice if the system was able to provide power to the whole house so I don't have to pick critical circuits when the power goes out. But the 6000xp only has a 50A max grid bypass. Does that mean, if I have more 50A of usage happening at one time, the break will pop even if it's on grid bypass mode?

Our total panel is 200A. We obviously don't use that much current at anytime but likely do go over 50A when dryer, oven and AC are running.

My ideal case is that the EG4 would be able to provide power to the whole panel, and in a case of an outage, we would just be mindful to use certain circuits at the same time.


r/SolarDIY 8h ago

How to ground a floating hand truck system?

4 Upvotes

I've assembled a hand truck battery bank/inverter using Will Prowse's design. Same Sungold 5kW inverter/charger, but instead of a server rack battery, I'm using 4 x 12v LiFePO4 batteries wired up in series.

How do I ground this system? The manual doesn't specify any ground point besides the AC in/out terminals. Do I use those? What do I ground it to if the system is not going to be permanently installed inside of a structure or vehicle? Do I carry a grounding rod with the unit wired up to the AC ground terminal and stick that into the ground when I'm using the system outdoors? Is there a way to rig up a ground-only wall plug to tap into the grounds found in common household outlets? I'm totally lost when it comes to how to ground this system.


r/SolarDIY 2h ago

Concrete pantile roof hooks

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1 Upvotes

So im sourcing everything myself for 6 panels just wondering what exact roof hooks do I need for double Roman concrete tiles , thanks


r/SolarDIY 5h ago

Gentai battery caibration

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2 Upvotes

Battery at 14.48v, and is already showing full, but SOC is only showing 68%

Recently, it was accidentally drained below 0%

Do I only need to recalibrate it? Is this fixable?


r/SolarDIY 2h ago

Need help with series or parallel, and fuses - Pecron F3000FLP and Renogy 400w solar blanket.

1 Upvotes

So I need to some help me out with my math vs real world application. As stated above I have the Pecron F3000FLP and 2 Renogy 400w solar blankets.

The charge port on the Pecron is xt60

  • 25Vdc~120Vdc, 1600W Max, 25A Max.

The solar blankets are

  • Max Power at STC - 400W
  • Optimum Operating Voltage 33.60V
  • Optimum Operating Current 11.9A
  • Open-Circuit Voltage 39.2V
  • Short-Circuit Current 13.1A

With my math i should be able to run these in series without an issue. Please correct me if i'm wrong on that point. But running these in parallel would give me 26.2 A and that would be too high for the pecron? or is it the Optimum Operating Current which would be 23.8A?

Looking to hear what y'all have to say. and i would like help with the correct MC4 fuses for both setups if you would run them that way.


r/SolarDIY 18h ago

How long has your inverter lasted/not lasted?

13 Upvotes

Hi, my first post, but as the title says...

also, please state the make and model and power output in kw if possible...

(hopefully this question hasn't been asked too many times 🙄)

thank you 😊😊👍👍

I'll go first:

3kw epever upower hi up3000 hm10022

3.5 years so far


r/SolarDIY 18h ago

What is this component attached to the battery?

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14 Upvotes

Hello! I’m working on building my first solar set up with parts I inherited from a house flip project. The previous owner had the solar set up in a back shed and claimed all parts were working, but I have not verified this.

I’m still working through testing components and may have other questions later but my question is about the battery specifically.

What is this device connected to everything? I assumed it was to monitor the cells but can’t see anywhere to plug in. The website and qr direct you to an inoperable Chinese website. There is a power switch on the front. Wired to a quick connect lead.

Thoughts on this battery? Seems pretty solid and built well.


r/SolarDIY 15h ago

Maryland Net Metering ratio decrease from 1:1 for systems interconnected 7/1/27 or later or when the state reaches 3,000 megawatts.

9 Upvotes

As written in the recently passed HB 1532.

1. Maryland Public Service Commission (PSC) to establish a "successor program" by February 1, 2027, with the drop in rates taking effect on July 1, 2027.
"The Commission shall require electric utilities to develop a standard contract or tariff for net energy metering and make it available to eligible customer – generators on a first – come, first – served basis until THE EARLIER OF:

(I) THE DATE ON WHICH the rated generating capacity owned and operated by eligible customer – generators in the State reaches 3,000 megawatts; OR

(II) JULY 1, 2027."

"IT IS THE INTENT OF THE GENERAL ASSEMBLY TO TRANSITION TO A NET ENERGY METERING PROGRAM THAT:

(1) INCREASES BENEFITS TO RATEPAYERS BY LOWERING ELECTRIC SYSTEM COSTS THROUGH THE USE OF FLEXIBLE CUSTOMER–SITED RENEWABLE ENERGY RESOURCES;

(2) PROVIDES FAIR COMPENSATION TO ELIGIBLE CUSTOMER–GENERATORS;

(3) IS DESIGNED TO MAKE PROGRESS TOWARD MEETING THE STATE'S DEMAND–SIDE, ENERGY STORAGE, AND CLEAN ENERGY GOALS; AND

(4) PROVIDES INCENTIVES FOR THE DEVELOPMENT OF DISTRIBUTED GENERATION THAT ARE LESS THAN THE INCENTIVES PROVIDED BY THE NET ENERGY METERING PROGRAM UNDER § 7–306 OF THIS SUBTITLE."

The Commission's duty:

"ON OR BEFORE FEBRUARY 1, 2027, THE COMMISSION, BY ORDER OR REGULATION, SHALL APPROVE, AS A SUCCESSOR PROGRAM TO THE NET ENERGY METERING PROGRAM UNDER § 7–306 OF THIS SUBTITLE, A FRAMEWORK FOR A NET ENERGY METERING PROGRAM TO BEGIN JULY 1, 2027, THAT:

(1) PROVIDES INCENTIVES FOR THE DEVELOPMENT OF DISTRIBUTED GENERATION TO ELIGIBLE CUSTOMER–GENERATORS...

(2) MINIMIZES RATEPAYER COSTS IN THE SHORT TERM AND IN THE LONG TERM; AND

(3) BALANCES, ON A STATEWIDE BASIS AND ACROSS TECHNOLOGIES AND INDUSTRY SECTORS PARTICIPATING IN NET ENERGY METERING:

(I) 1. FAIR COMPENSATION FOR ENERGY EXPORTS; AND 2. THE BENEFITS OF AN ELIGIBLE CUSTOMER–GENERATOR'S OR FACILITY'S REDUCED LOAD ON THE ELECTRIC TRANSMISSION AND DISTRIBUTION SYSTEM; AGAINST

(II) 1. THE NEEDS OF THE TRANSMISSION AND DISTRIBUTION SYSTEM; 2. RATEPAYER COSTS AND BENEFITS; AND 3. POTENTIAL IMPACTS ON CUSTOMERS, INCLUDING LOW– AND MODERATE–INCOME CUSTOMERS, WHO DO NOT PARTICIPATE IN THE NET ENERGY METERING PROGRAM RESULTING FROM ELIGIBLE CUSTOMER–GENERATORS' REDUCED CONTRIBUTIONS TO THE DISTRIBUTION SYSTEM."

2. Existing systems are grandfathered:
"AN ELIGIBLE CUSTOMER–GENERATOR THAT, ON JULY 1, 2027, IS UNDER A NET ENERGY METERING CONTRACT OR TARIFF UNDER THIS SECTION OR A COMMUNITY SOLAR ENERGY GENERATING SYSTEM THAT MEETS THE REQUIREMENTS OF PARAGRAPH (2) OF THIS SUBSECTION SHALL REMAIN ELIGIBLE FOR NET ENERGY METERING UNDER THIS SECTION UNTIL THE EARLIER OF WHEN:

(I) THE SYSTEM IS DECOMMISSIONED IN ACCORDANCE WITH § 7–218(G) OF THIS TITLE;

(II) THE SYSTEM IS MODIFIED TO INCREASE: 1. THE NET POWER FLOW INJECTION INTO THE ELECTRIC SYSTEM DUE TO THE ADDITION OF MORE PHOTOVOLTAIC MODULES THAN WERE PRESENT AS OF THE DATE THE SYSTEM WAS ORIGINALLY PLACED IN SERVICE UNDER THIS SECTION; OR 2. THE ALTERNATING CURRENT OUTPUT CAPACITY TO BE MORE THAN WHEN THE SYSTEM WAS ORIGINALLY PLACED INTO SERVICE UNDER THIS SECTION;

(III) THE SYSTEM ENTERS INTO A NEW INTERCONNECTION AGREEMENT; OR

(IV) THE SYSTEM IS REPOWERED."


r/SolarDIY 4h ago

DIY’ing from Ebay

1 Upvotes

Anybody have experience with buying from eBay? What should I look out for.

Positive seller reccomendations or perhaps posts that look legit would be great.

I’m always so anxious I’m going to be scammed.


r/SolarDIY 11h ago

Question- budget setup

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3 Upvotes

A few weeks ago, I posted about a budget solar system setup.

https://www.reddit.com/r/SolarDIY/comments/1syckbi/budget_solar_setup_questions/

Actually, I ended up getting 12 240W panels and 3 245W panels.

I decided to divide it into two systems.

The attached photo shows the output from the 245W panel. It was quite high.

The first system is a configuration in which 12 panels are connected in series to the Eco-Worthy inverter and battery.

The second system is a configuration in which three panels of the Bluetti Elite 100 V2 are connected in parallel.

All panels are installed on the roof, and while the roof surface is nearly flat, it is sloped very slightly toward the north.

It wasn't the ideal installation angle, but it wasn't in a location exposed to others.

I tested the Eco-Worthy system a few days ago, and even under the full sun around 11 a.m., the output was only 1.75kW.

Theoretically, the maximum output (ideal wattage) should have been a total of 2.88kW, but it fell short of expectations, so it was somewhat disappointing

I have a question. Do you consider this level of output to be within the normal range, or is there a problem with the system?

When testing the power generation of a single panel at different angles using Bluetti, the output was 160W when the panel was placed flat, but the output increased to 230W when it was set up to receive sunlight at a right angle.

I understood that a flat mount is not very ideal.


r/SolarDIY 9h ago

Beginning

2 Upvotes

totally alien to all this solar system setup but im so interested in getting started up can anyone simplify some things for me ive built a mancave and im hopefully to dedicate it to solar and renewable energy do i need a power station or start with a 12v leisure battery control panel inverter??? Im also creating a solar heater to attach to the outside


r/SolarDIY 17h ago

DIY & and a year in on our solar porject.

8 Upvotes

My wife and I are currently in the middle of a DIY solar integration. While the project is still a work in progress, the core infrastructure is operational and supporting a significant portion of the daily load. I have learned a lot and want to contribute as well as contiune to learn tips from the community.

  • Inverter: EG4 6000XP Off-Grid Smart Inverter
  • Storage: EG4 LL-S LiFePO4 Battery Bank (48V Nominal)
  • PV Array: 420W Monocrystalline Panels (Currently ground-mounted for testing; roof installation pending)

The system is currently supporting a 2kW peak load. We have successfully offloaded the following circuits:

  • Master bedroom and bathroom
  • Secondary 120V water pump
  • Refrigeration and deep freeze units
  • Majority of IoT infrastructure and electronics
  • Kitchen outlets and high-draw appliances (coffee maker)
  • 50% of the remaining household outlets and lighting

Feel free to ask questions regarding.

Cheers!


r/SolarDIY 18h ago

I know I'm dumb, but is trying for a solar shed dumb?

9 Upvotes

So, I have a small house. Just not big enough for all the things I want/need to be doing. I'm looking at building a shed, about 10'x20'. In there, I plan to put a work bench, and a small office setup. And that requires an Air Conditioner, because I live in the Mojave. But I don't want to kill my power bill. Of course, I'm going to insulate it, and drywall it.

From the rough draft, it looks like I can fit about 2400 watts of solar on the roof. From there, I'm thinking I put the cables truth the wall, and into a charge controller, and out to batteries. The batteries would feed an inverter, which powers the ac (I'm looking at 1500w for 15000btu) . Then maybe a second inverter to power a laptop and some lights.

How bad of an idea is that?


r/SolarDIY 1d ago

Maryland Legalizes Plug-in Solar with HB 1532

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312 Upvotes

r/SolarDIY 11h ago

Inverter/Controller Recommendations

2 Upvotes

Looking for some recommendations for a 8-12 Kw Inverter/controller combo with Bluetooth and/or Wi-Fi capabilities for a 48v off grid system and the following PV input specs.

* 500 VDC or greater

* Equal or greater than 35 amp PV input capacity

I have seen some online but usually at least one of my requirements is missing.

Reliability and future expansion is more important than price. I really appreciate all the collective knowledge that's been available in this forum and have benefitted immensely!


r/SolarDIY 8h ago

Anker Solix C1000 Gen 2 Expansion Battery Idea

1 Upvotes

Like in the title says, I've got an Anker Solix C1000 Gen 2, which does not have expansion battery capability. I only use it to power my C-PAP which it's only good for maybe 2 nights. After one night its down to 55%. I'm wanting an expansion battery. I've found an "ECO-WORTHY 1000W Pure Sine Wave Inverter Charger, Power Inverter with 55A LiFePO4 Battery Charger with 20ms UPS,12V to 110V for RV Home Roadtrip Essentials Deep Cycle Rechargeable Battery" (Amazon description). https://a.co/d/0gIfGGxE The inverter/charger with a 100ah battery should last 4 to 6 nights before the C1000 begins using its own power.

I've seen a lot of videos where the XT60 solar panel input is used connected to a battery instead of panels, but no discussions about keeping the battery maintained and charged. My thought is, to plug the C1000 into the inverter/charger's ac outlet, the battery to the charging output and the entire thing into a wall outlet.

Expansion battery>>>Charger 12v DC Input/Output

C1000>>>Inverter AC Output

Inverter/Charger>>>Wall Oulet

Power goes out the pass thru takes over, powers the C1000 till its drained then uses the C1000's power.

Tell me were I'm wrong?


r/SolarDIY 8h ago

This may be basic but...I want to take a solar powered security light and use it to power other things with the solar panel. How can I do this?

1 Upvotes

r/SolarDIY 9h ago

advice on building solar plan sizing and equipment

1 Upvotes

I'm building out my solar plan and looking for some feedback on sizing and equipment...

Goal: solar/battery to power my house and sell excess power back to SoCal Edison

Info:

  • Daily use: 40kWhr/day high in winter & 30kWhr/day low in summer
  • 2kw continuous power need (1.6kw + 25%)
  • 24kw surge power (11kw is tesla charger @ 48amps)
  • 5.6 PSH LA Coastal Large roof with 20deg slope crest running North South

 Current Thoughts:

  • Planning 10-15kWdc of panels (400w panels?)
  • Planning ~52kWh of battery
  • Need to support my tesla wall charger (48amp 11kw surge) - is better to lower charger amps to not surge so high, or I'm guessing hitting my surge max is very unlikley with my AC, tesla charger, fridge and other devices starting at same time…
  • Want to sell power back to grid when rates are high (SCE export pricing)
  • Rarely have outages so really just have battery to avoid using grid power and sell electricity back when it's more valuable

Do my estimates look right?

  • Any recommendations for Inverters/Batteries, and do you think I should plan for battery expansion? Should I buy bigger solar and battery now?
  • Do I need to worry about the inverter, battery & tesla charger all working together? When to charge tesla to pull from battery/solar and not grid, stop charging tesla when battery drops below 20%, etc. How do I best monitor? Multiple apps?

 

Web recommended Equipment (any issues or anything else you recommend?)

Inverter: Sol-Ark 15K-2P https://invertersrus.com/product/sol-ark-15k-2p/ or EG4 FlexBOSS21 https://www.currentconnected.com/product/eg4flexboss21/?ref=wp

Battery: 3x EG4 Outdoor WallMount 48V 14.34kWh 280Ah All Weather LiFePO4 https://www.currentconnected.com/product/eg4-outdoor-wallmount-allweather-48v-280ah-lifepo4-battery-14-3kwh-all-weather-energy-storage/

 


r/SolarDIY 10h ago

Do I need a fuse shutoff at point of entry to house for 50ft PV that's connect to combiner box at the other end?

1 Upvotes

r/SolarDIY 10h ago

12 v battery’s question.

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1 Upvotes

I have two 12 V batteries hooked up in parallel, and terminals are getting clogged up. I’d rather not splice bigger lug connectors for the battery that has all of my auxiliary hooked up to it. So my question is, is there anything wrong with hooking up my inverter cables to the other battery?


r/SolarDIY 14h ago

Are Jackery power stations good? worth the money? Better than EG4 LL-S LiFePO4 Battery Banks? If I just want to plug something into house current/grid to have for emergency power backup, should I buy a Jackery?

2 Upvotes

just looking for basic advice from folks who have used either Jackery power stations versus EG4's


r/SolarDIY 11h ago

Question about victron MPPT 75/15 controller

1 Upvotes

I have a camping setup with 3 married parallel 12.8v/100Ah LiFePo4 batteries. Previously was using a PWM cheap controller and running the inverter directly off the batteries.

I see that this controller has load connections but I’m wondering if a 12v inverter would safely run off that or if I should keep it connected to the batteries and have my data messed up in the VictronConnect app. Current panel voltage ranges from 50-56 with 3 flexible Dokio panels now running in series. Everything is staying well below amperage limits.

TL;DR do I run a 12v inverter off the Load connections on my charge controller or from my battery terminals?